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19-4742; Rev 0; 7/09
+5V Multiprotocol, Pin-Selectable Cable Terminator
General Description
The MAX13174E contains six pin-selectable, multiprotocol cable termination networks. Each network is capable of terminating V.11 (RS-422, RS-530, RS-530A, RS-449, V.36, and X.21) with a 100 differential load, V.35 with a T-network load, or V.28 (RS-232) and V.10 (RS-423) with an open-circuit load for use with transceivers having on-chip termination. The termination protocol can be selected by the serial interface cable wiring or by pin control. The MAX13174E replaces discrete resistor termination networks and expensive relays required for multiprotocol termination, saving space and cost. The MAX13174E terminator is ideal to form a complete +5V cable- or pin-selectable multiprotocol DCE/DTE interface port when used with the MAX13170E and MAX13172E transceiver ICs. The MAX13174E terminator can use the V EE power generated by the MAX13170E charge pump, simplifying system design. The MAX13174E/MAX13170E/MAX13172E are pinfor-pin compatible with the MXL1344A/MXL1543/ MXL1544/MAX3175. The MAX13174E is available in a 24-pin SSOP package and is specified for the 0C to +70C commercial temperature range. o Supports V.11 and V.35 Termination o Pin-Selectable Termination o Pin-Selectable DCE/DTE Support o Replaces Discrete Resistor Termination Networks and Expensive Relays o Available in 24-Pin SSOP Package o Certified TBR-1 and TBR-2-Compliant Chipset (NET1 and NET2)--Pending Completion of Testing
Features
MAX13174E
Applications
Data Networking CSU and DSU Data Routers PCI Cards Telecommunication Equipment Data Switches
Ordering Information
PART MAX13174ECAG+ TEMP RANGE 0C to +70C PIN-PACKAGE 24 SSOP
+Denotes a lead(Pb)-free/RoHS-compliant package.
Pin Configuration appears at end of data sheet.
Typical Operating Circuit
LL CTS DSR DCD DTR RTS RXD RXC TXC SCTE TXD
T4
R4
R3
R2
R1
MAX13172E T3
T2
T1
R3
R2
R1
MAX13170E T3
T2
T1 MAX13174E
18 LL A (141)
13 5 10 8 CTS A (106) CTS B DSR A (109) DSR B
22 6 DCD A (107) DCD B
23 20 19 4 DTR A (108) DTR B RTS A (105) RTS B
1
7
16 3 RXD A (104) RXD B
9 17 RXC A (115) RXC B
12 15 11 24 14 2 TXC A (114) TXC B SCTE A (113) SCTE B TXD A (103) TXD B
DB-25 CONNECTOR
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
SG (102) SHIELD (101)
1
+5V Multiprotocol, Pin-Selectable Cable Terminator MAX13174E
ABSOLUTE MAXIMUM RATINGS
(All voltages to GND, unless otherwise noted.) Supply Voltages VCC .......................................................................-0.3V to +6V VEE.....................................................................+0.3V to -7.1V Logic-Input Voltages M0, M1, M2, DCE/DTE, LATCH............................-0.3V to +6V Termination Network Inputs R_A, R_B, R_C.....................................................-15V to +15V R_A to R_B (high-impedance state) ................................14V R_A to R_B.........................................................................6V R_C to R_B (high-impedance state) ..................................3V R_A to R_C.........................................................................3V R_C to R_A (high-impedance state) ................................14V Continuous Power Dissipation (TA = +70C) 24-Pin SSOP (derate 14.9mW/C above +70C) .......1196mW Junction-to-Case Thermal Resistance (JC) (Note 1) 24-Pin SSOP..............................................................24.6C/W Junction-to-Ambient Thermal Resistance (JA) (Note 1) 24-Pin SSOP..............................................................66.9C/W Operating Temperature Range...............................0C to +70C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a fourlayer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VCC = +4.5V to +5.5V, VEE = -4V to -7.1V, TA = 0C to +70C, unless otherwise noted. Typical values are at TA = +25C, VCC = +5V, VEE = -5V, unless otherwise noted.) (Note 2)
PARAMETER VCC Operating Range VEE Operating Range VCC POR Rising Threshold VCC Supply Current ICC All inputs connected to GND or VCC, except no-cable mode All inputs connected to GND or VCC, except no-cable mode SYMBOL VCC VEE CONDITIONS MIN 4.5 -7.1 1 TYP 5 -5 1.88 2.2 1.34 -3.5 -1 MAX 5.5 -4 2.75 6.15 2.85 mA UNITS V V V mA
ICC_NOCAB VEE = 0V, M[x] = 1111 (Note 3) VEE Supply Current TERMINATOR INPUTS Differential-Mode Impedance V.35 Mode Common-Mode Impedance V.35 Mode Differential-Mode Impedance V.11 Mode High-Impedance Leakage Current Differential Path Enable Time Differential Path Disable Time Common-Mode Path Enable Time Common-Mode Path Disable -2V VCM +2V, all channels (Figure 1) -2V VCM +2V, all channels (Figure 2) -7V VCM +7V, all channels, except nocable mode (Figure 1) -7V VCM +7V, all channels, no-cable mode, VEE = 0V, VAB 2V (Figure 1) IZ -15V VR_A +15V -50 90 135 100 IEE
104 153 104 115
110 165 110

+50 50 300 12 2
A s s s s
2
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+5V Multiprotocol, Pin-Selectable Cable Terminator
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +4.5V to +5.5V, VEE = -4V to -7.1V, TA = 0C to +70C, unless otherwise noted. Typical values are at TA = +25C, VCC = +5V, VEE = -5V, unless otherwise noted.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN 0.66 x VCC 0.33 x VCC VIN = VCC or GND Human Body Model R_A, R_B to GND All Other Pins Air Gap Discharge IEC 61000-4-2 Contact Discharge IEC 61000-4-2 Human Body Model -1 15 10 6 2 kV kV +1 TYP MAX UNITS LOGIC INPUTS (M0, M1, M2, LATCH, DCE/DTE) Input High Voltage Input Low Voltage Logic Input Current ESD PROTECTION VIH VIL IIN V V A
MAX13174E
Note 2: All parameters tested at a single temperature. Specifications over temperature are guaranteed by design. Note 3: M[x] is the input bus DCE/DTE, M2, M1, M0.
Typical Operating Characteristics
(VCC = +5V, VEE = -5V, TA = +25C, unless otherwise noted.)
V.11 OR V.35 DIFFERENTIAL IMPEDANCE vs. TEMPERATURE
MAX13174E toc01
V.11 OR V.35 DIFFERENTIAL IMPEDANCE vs. COMMON-MODE VOLTAGE (VCM)
MAX13174E toc02
V.11 OR V.35 DIFFERENTIAL IMPEDANCE vs. SUPPLY VOLTAGE (VCC)
109 108 IMPEDANCE (I) 107 106 105 104 103 102 101 100
MAX13174E toc03
110 109 108 IMPEDANCE (I) 107 106 105 104 103 102 101 100 0 10 20 30 40 50 60 VCM = +7V VCM = -7V VCM = 0V
110 109 108 IMPEDANCE (I) 107 106 105 104 103 102 101 100
110
70
-7
-5
-3
-1
1
3
5
7
4.5
4.7
4.9
5.1
5.3
5.5
TEMPERATURE (NC)
VCM (V)
VCC (V)
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3
+5V Multiprotocol, Pin-Selectable Cable Terminator MAX13174E
Typical Operating Characteristics (continued)
(VCC = +5V, VEE = -5V, TA = +25C, unless otherwise noted.)
V.11 OR V.35 DIFFERENTIAL IMPEDANCE vs. SUPPLY VOLTAGE (VEE)
MAX13174E toc04
V.35 COMMON-MODE IMPEDANCE vs. TEMPERATURE
MAX13174E toc05
V.35 COMMON-MODE IMPEDANCE vs. COMMON-MODE VOLTAGE (VCM)
MAX13174E toc06
110 109 108 IMPEDANCE (I) 107 106 105 104 103 102 101 100 -7 -6 VEE (V) -5
165 160 IMPEDANCE (I) 155 150 145 140 135 VCM = -2V VCM = +2V
165 160 IMPEDANCE (I) 155 150 145 140 135
-4
0
10
20
30
40
50
60
70
-2
-1
0 VCM (V)
1
2
TEMPERATURE (NC)
V.35 COMMON-MODE IMPEDANCE vs. SUPPLY VOLTAGE (VCC)
MAX13174E toc07
V.35 COMMON-MODE IMPEDANCE vs. SUPPLY VOLTAGE (VEE)
MAX13174E toc08
HI-Z MODE SUPPLY CURRENT vs. TEMPERATURE
900 800 SUPPLY CURRENT (FA) 700 600 500 400 300 200 100 IEE ICC
MAX13174E toc09
165 160 IMPEDANCE (I) 155 150 145 140 135 4.5 4.7 4.9 5.1 5.3 VCM = -2V VCM = +2V
165 160 IMPEDANCE (I) 155 150 145 140 135 VCM = -2V VCM = +2V
1000
0 -7 -6 VEE (V) -5 -4 0 10 20 30 40 50 60 70 TEMPERATURE (NC)
5.5
VCC (V)
V.11 OR V.35 DIFFERENTIAL IMPEDANCE MAGNITUDE vs. FREQUENCY
MAX13174E toc10
V.11 OR V.35 DIFFERENTIAL IMPEDANCE PHASE vs. FREQUENCY
10 5 PHASE (DEGREES) 0 -5 -10 -15 -20 -25 -30
MAX13174E toc11
120 100 IMPEDANCE (I) 80 60 40 20 0 0.1 1 10
15
-35 100 0.1 1 10 100 FREQUENCY (MHz) FREQUENCY (MHz)
4
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+5V Multiprotocol, Pin-Selectable Cable Terminator
Pin Description
PIN 1 2 3 4 5 6 7 8 9 10 11 12, 13 14 15 16 17 18 19 20 21 22 23 24 NAME M0 VEE R1C R1B R1A R2A R2B R2C R3A R3B R3C GND VCC R4B R4A R5B R5A R6A R6B LATCH DCE/DTE M2 M1 Mode-Select Input (Table 1) Negative Supply Voltage (typically connected to VEE of MAX13170E). Bypass to GND with a 0.1F capacitor. Load 1, Center Tap Load 1, Node B Load 1, Node A Load 2, Node A Load 2, Node B Load 2, Center Tap Load 3, Node A Load 3, Node B Load 3, Center Tap Ground +5V Supply Voltage. Bypass to GND with a 0.1F capacitor. Load 4, Node B Load 4, Node A Load 5, Node B Load 5, Node A Load 6, Node A Load 6, Node B Latch Signal Input. When LATCH is low, the input latches are transparent. When LATCH is high, the data at the mode-select inputs are latched. DCE/DTE Mode-Select Input (Table 1) Mode-Select Input (Table 1) Mode-Select Input (Table 1) FUNCTION
MAX13174E
Detailed Description
The MAX13174E contains six pin-selectable multiprotocol cable termination networks (Figure 3). Each network is capable of terminating V.11 (RS-422, RS-530, RS-530A, RS-449, V.36, and X.21) with a 100 differential load, V.35 with a T-network load, or V.28 (RS-232) and V.10 (RS-423) with an open-circuit load for use with transceivers that have on-chip termination. The termination protocol can be selected by the serial interface cable wiring or by pin control. The MAX13174E replaces discrete resistor termination networks and expensive relays required for multiprotocol termination, saving space and cost. The MAX13174E terminator is designed to form a complete +5V cable- or pin-selectable multiprotocol DCE/DTE interface port when used with the MAX13170E and MAX13172E transceivers. The MAX13174E terminator
can use the VEE power generated by the MAX13170E charge pump, simplifying system design. The MAX13174E/MAX13170E/MAX13172E are functionally compatible with the MXL1344A/MXL1543/MXL1544/ MAX3175.
Termination Modes
The termination networks in the MAX13174E can be set to one of three modes: V.11, V.35, or high impedance. As shown in Figure 4, in V.11 mode, switch S1 is closed and switch S2 is open, presenting 104 across terminals A and B. In V.35 mode, switches S1 and S2 are both closed, presenting a T-network with 104 differential impedance and 153 common-mode impedance. In high-impedance mode, switches S1 and S2 are both open, presenting a high impedance across terminals A and B suitable for V.28 and V.10 modes.
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5
+5V Multiprotocol, Pin-Selectable Cable Terminator MAX13174E
A A
I
R1 = 52 R1 = 52
AMMETER
S1 ON R3 = 127 S2 OFF AMMETER S2 ON R2 = 52 I R2 = 52 VCM = 2V B VCM = 7V OR 2V V RDM = DM I RCM = VCM I B S1 ON R3 = 127
VDM = 2V
Figure 1. V.11 or V.35 Differential Impedance Measurement
Figure 2. V.35 Common-Mode Impedance Measurement
3 1 24 23 22 21 M0 M1 M2 DCE/DTE LATCH VCC VEE 14 2 54 1 MAX13174E
8
11 12
13
Applications Information
Older multiprotocol interface termination circuits have been constructed using expensive relays with discrete resistors, custom cables with built-in termination, or complex circuit-board configurations to route signals to the correct termination. The MAX13174E provides a simple solution to this termination problem. All required termination configurations are easily cable- or pinselectable using the four mode-control input pins (M0, M1, M2, and DCE/DTE).
2
3
4
5
6
67
9 10 16 15 18 17 19 20
Figure 3. Block Diagram
Using the MAX13174E in a Multiprotocol Serial Interface
The MAX13174E terminator is designed to form a complete +5V cable- or pin-selectable multiprotocol DCE/DTE interface port when used with the MAX13170E/MAX13172E differential drivers/receivers. The MAX13174E terminator is designed to use the VEE power generated by the MAX13171E's charge pump and meets all data sheet specifications when connected as illustrated in Figure 5. The mode-selection tables of all three devices are identical, allowing the M0, M1, M2, and DCE/DTE pins of each device to be connected to a single 4-wire control bus. The MAX13170E and MAX13172E provide internal pullups for the four lines,
The state of the MAX13174E's mode-select pins--M0, M1, M2, and DCE/DTE--determines the mode of each of the six termination networks. Table 1 shows a cross-reference of termination mode and select pin state for each of the six termination networks within the MAX13174E.
No-Cable Mode
The MAX13174E enters no-cable mode when the modeselect inputs--M0, M1, and M2--are connected high. In no-cable mode, all six termination networks are placed in V.11 mode, with S1 closed and S2 open (Figure 4).
6
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+5V Multiprotocol, Pin-Selectable Cable Terminator MAX13174E
Table 1. Termination Mode Select Table
PROTOCOL V.10/RS-423 RS-530A RS-530 X.21 V.35 RS-449/V.36 V.28/RS-232 No Cable V.10/RS-423 RS-530A RS-530 X.21 V.35 RS-449/V.36 V.28/RS-232 No Cable DCE/ DTE 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 M2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 M1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 M0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 R1 Z Z Z Z V.35 Z Z V.11 Z Z Z Z V.35 Z Z V.11 R2 Z Z Z Z V.35 Z Z V.11 Z Z Z Z V.35 Z Z V.11 R3 Z Z Z Z Z Z Z V.11 Z Z Z Z V.35 Z Z V.11 R4 Z V.11 V.11 V.11 V.35 V.11 Z V.11 Z Z Z Z Z Z Z V.11 R5 Z V.11 V.11 V.11 V.35 V.11 Z V.11 Z V.11 V.11 V.11 V.35 V.11 Z V.11 R6 Z V.11 V.11 V.11 V.35 V.11 Z V.11 Z V.11 V.11 V.11 V.35 V.11 Z V.11
Note: Z indicates high impedance, 1 = high, and 0 = low. Z, V.11, and V.35 refer to termination modes (Figure 4).
A MAX13174E R1 52
A MAX13174E R1 52
A MAX13174E R1 52
S1 CLOSED C
S1 CLOSED C
S1 OPEN C
S2 OPEN R2 52
R3 127
S2 CLOSED R2 52
R3 127
S2 OPEN R2 52
R3 127
B
B
B
(a) V.11
Figure 4. Termination Modes
(b) V.35
(c) Z
forcing them to the logic-high state if they are not grounded. This allows interface-mode configuration by simply strapping the appropriate pins to ground in the interconnect cable.
V.11 Termination
A standard V.11 interface is shown in Figure 6. For highspeed data transmission, the V.11 specification recommends terminating the cable at the receiver with a 100 (min) resistor. The resistor, although not required, prevents reflections from corrupting transmitted data.
7
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+5V Multiprotocol, Pin-Selectable Cable Terminator MAX13174E
C6 100pF 3 VCC 5V 14 3 C3 4.7F C1 1F C4 4.7F DTE_TXD/DCE_RXD DTE_SCTE/DCE_RXC 5 6 7 DTE_TXC/DCE_TXC DTE_RXC/DCE_SCTE DTE_RXD/DCE_TXD 8 9 10 T1 T2 T3 R1 R2 R3 20 19 18 17 16 15 15 12 17 9 3 16 7 TXC A TXC B TXC A TXC B 1 2 4 CHARGE PUMP 28 27 26 25 24 23 22 21 C13 1F C2 1F 2 C5 4.7F C12 1F M0 VEE 5 4 6 7 DCE/DTE M2 M1 VCC LATCH 21 C7 100pF 8 C8 100pF
11
12 13 MAX13174E
9 10 16 15 18 17 19 20 22 23 24 1 DTE 2 TXD A 14 TXD B 24 SCTE A 11 SCTE B DCE RXD A RXD B RXC A RXC B
RXC A SCTE A RXC B SCTE B RXD A TXD A RXD B TXD B SG
MAX13170E M0 M1 13 M2 14 DCE/DTE 11 12
1
SHIELD
DB-25 CONNECTOR C9 1F C10 1F VCC 1 28 VCC VDD VEE GND 27 C11 1F
2
DTE_RTS/DCE_CTS DTE_DTR/DCE_DSR
3 4 5
T1 T2 T3 R1 R2 R3 R4 T4
26 25 24 23
4 RTS A 19 RTS B 20 DTR A 23 DTR B 8 DCD A 10 DCD B 6 DSR A 22 DSR B 5 CTS A 13 CTS B 18 LLA
CTS A CTS B DSR A DSR B
DTE_DCD/DCE_DCD DTE_DSR/DCE_DTR DTE_CTS/DCE_RTS DTE_LL/DCE_LL
6 7 8 10 9
22 21 20 19 18 17 16
DCD A DCD B DTR A DTR B RTS A RTS B LLA
MAX13172E M0 15 M1 INVERT 13 M2 14 DCE/DTE 11 12 DCE/DTE M2 M1 M0
Figure 5. Multiprotocol DCE/DTE Port
8 _______________________________________________________________________________________
+5V Multiprotocol, Pin-Selectable Cable Terminator MAX13174E
GENERATOR BALANCED INTERCONNECTING CABLE LOAD CABLE RECEIVER TERMINATION A 100 MIN B C B C
impedance and a 150 15 common-mode impedance. The V.35 driver generates a current output (11mA, typ) that develops an output voltage between 440mV and 660mV across the load termination networks. In Figure 9, the MAX13174E is used to implement the resistive T-network that is needed to properly terminate the V.35 receiver. Internal to the MAX13174E, S1 and S2 are closed to connect the T-network resistors to the circuit. The V.35 specification allows for 4V of ground difference between the V.35 generator and V.35 load. The MAX13174E maintains correct termination impedance over these conditions.
A
Figure 6. Typical V.11 Interface
In Figure 7, the MAX13174E is used to terminate the V.11 receiver on the MAX13170E. Internal to the MAX13174E, S1 is closed and S2 is open to present a 104 typical differential resistance and high-Z common-mode impedance. The MAX13170E's internal V.28 termination is disabled by opening S3. The V.11 specification allows for signals with commonmode variations of 7V and differential signal amplitudes from 2V to 6V. The MAX13174E maintains termination impedance between 100 and 110 over these conditions.
V.35 EMI reduction
For applications where EMI reduction is especially important, the MAX13174E termination networks provide a pin for shunting common-mode driver currents to GND. Mismatches between the driver A and B output propagation delays can create a common-mode disturbance on the cable. This common-mode energy can be shunted to GND by placing a 100pF capacitor to GND from the center tap of the T-network termination (R1C, R2C, and R3C as shown in Figure 5).
V.28 Termination
Most industry-standard V.28 receivers (including the MAX13170E and MAX13172E) do not require external termination because the receiver includes an internal 5k termination resistor. When the MAX13174E is
V.35 Termination
Figure 8 shows a standard V.35 interface. The generator and the load must both present a 100 10 differential
A
A R5 55k R1 52
MAX13170E
MAX13174E
R8 5k
R6 11k
RECEIVER
S1 S2 R3 124
S3 + 1.4V
R2 52 B B R4 55k S2 GND
R7 11k S1
C
Figure 7. V.11 Termination and Internal Resistance Networks
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+5V Multiprotocol, Pin-Selectable Cable Terminator MAX13174E
GENERATOR BALANCED INTERCONNECTING CABLE A 50 A CABLE TERMINATION 50 LOAD RECEIVER
125
125
50 B C B C
50
Figure 8. Typical V.35 Interface
A
A R5 55k R1 52
MAX13170E
MAX13174E
R8 5k
R6 11k
RECEIVER
S1 S2 R3 124
S3 + 1.4V
R2 52 B B R4 55k S2 GND
R7 11k S1
C
Figure 9. V.35 Termination and Internal Resistance Networks
placed in V.28 mode, all six of the termination networks are placed in a high-Z mode. In high-Z mode, the MAX13174E termination networks do not interfere with the MAX13170E's internal 5k termination. In Figure 10, the MAX13174E and MAX13170E are placed in V.28 mode. Switches S1 and S2 are opened on the MAX13174E to place the network in high-Z mode. Switch S3 is closed on the MAX13170E to enable the 5k terminating resistor.
A Complete X.21 Interface
A complete DTE-to-DCE interface operating in X.21 mode is shown in Figure 11. The MAX13174E terminates the V.11 clock and data signals. The MAX13170E carries the clock and data signals, and the MAX13172E carries the control signals. The control signals generally do not require external termination.
ESD Protection
ESD-protection structures are incorporated on all pins to protect against electrostatic discharges encountered during handling and assembly. The differential resistors
10
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+5V Multiprotocol, Pin-Selectable Cable Terminator MAX13174E
A A R5 55k R1 52
MAX13170E
MAX13174E
R8 5k
R6 11k
RECEIVER
S1 S2 R3 124
S3 + 1.4V
R2 52 B B R4 55k
R7 11k S1
C GND
S2
Figure 10. V.28 Termination and Internal Resistance Networks
have extra protection against static electricity. Maxim's engineers have developed state-of-the-art structures to protect these pins against an ESD of 15kV (Human Body Model) without damage. The ESD structures withstand high ESD in all states: normal operation, shutdown, and powered down. After an ESD event, the MAX13174E keeps working without latchup or damage. ESD protection can be tested in various ways. The Electrical Characteristics table shows the limits, and each device is characterized for protection to the following methods: * Human Body Model * * Contact Method specified in IEC 61000-4-2 Air Gap Discharge Method specified in IEC 61000-4-2
IEC 61000-4-2 The IEC 61000-4-2 standard covers ESD testing and the performance of finished equipment. However, it does not specifically refer to integrated circuits. The MAX13174E helps equipment designs to meet IEC 61000-4-2 without the need for additional ESD-protection components. The major difference between tests done using the Human Body Model and IEC 61000-4-2 is higher peak current in IEC 61000-4-2 because series resistance is lower in the IEC 61000-4-2 model. Figure 12c shows the IEC 61000-4-2 model, and Figure 12d shows the current waveform for the IEC 61000-4-2 ESD Contact Discharge test.
ESD Test Conditions ESD performance depends on a variety of conditions. Contact Maxim for a reliability report that documents test setup, test methodology, and test results. Human Body Model Figure 12a shows the Human Body Model, and Figure 12b shows the current waveform it generates when discharged into a low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of interest, which is then discharged into the test device through a 1.5k resistor.
Compliance Testing
A European Standard EN 45001 test report for the MAX13170E, MAX13172E, and MAX13174E chipset will be available from Maxim upon completion of testing. Contact Maxim Quality Assurance for a copy of the report.
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11
+5V Multiprotocol, Pin-Selectable Cable Terminator MAX13174E
DTE SERIAL CONTROLLER TXD
MAX13170E MAX13174E MAX13174E
DCE
MAX13170E
SERIAL CONTROLLER TXD
D1
TXD
104
R3
SCTE
D2 D3
SCTE
104
R2 R1
SCTE
TXC RXC
R1 R2
104 104
TXC RXC RXD
D3 D2
TXC RXC
RXD
R3
104
D1
RXD
MAX13172E
MAX13172E
RTS DTR
D1 D2 D3
RTS DTR
R3 R2 R1
RTS DTR
DCD DSR CTS LL
R1 R2 R3 D4 R4
DCD DSR CTS LL
D3 D2 D1 R4 D4
DCD DSR CTS LL
Figure 11. DTE-to-DCE X.21 Interface
12
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+5V Multiprotocol, Pin-Selectable Cable Terminator MAX13174E
RC 1M CHARGE-CURRENT LIMIT RESISTOR HIGHVOLTAGE DC SOURCE RD 1500 DISCHARGE RESISTANCE DEVICE UNDER TEST
IP 100% 90% AMPS
IR
PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE)
Cs 100pF
STORAGE CAPACITOR
36.8% 10% 0 0 tRL TIME tDL CURRENT WAVEFORM
Figure 12a. Human Body ESD Test Model
RC 50M TO 100M CHARGE-CURRENT LIMIT RESISTOR HIGHVOLTAGE DC SOURCE RD 330 DISCHARGE RESISTANCE DEVICE UNDER TEST
Figure 12b. Human Body Current Waveform
I 100% 90% IPEAK
Cs 150pF
STORAGE CAPACITOR
10% tR = 0.7ns TO 1ns 30ns 60ns t
Figure 12c. IEC 61000-4-2 ESD Test Model
Figure 12d. IEC 61000-4-2 ESD Generator Current Waveform
Pin Configuration
PROCESS: BiCMOS
TOP VIEW
M0 1 VEE 2 R1C 3 R1B 4 R1A 5 R2A 6 R2B 7 R2C 8 R3A 9 R3B 10 R3C 11 GND 12
Chip Information
+
24 M1 23 M2 22 DCE/DTE 21 LATCH
Package Information
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. PACKAGE TYPE 24 SSOP PACKAGE CODE A24+3 DOCUMENT NO. 21-0056
MAX13174E
20 R6B 19 R6A 18 R5A 17 R5B 16 R4A 15 R4B 14 VCC 13 GND
SSOP
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
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