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3.3V CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
Integrated Device Technology, Inc.
IDT54/74FCT3245/A
FEATURES:
* 0.5 MICRON CMOS Technology * ESD > 2000V per MIL-STD-883, Method 3015; > 200V using machine model (C = 200pF, R = 0) * 25 mil Center SSOP and QSOP Packages * Extended commercial range of -40C to +85C * VCC = 3.3V 0.3V, Normal Range or VCC = 2.7V to 3.6V, Extended Range * CMOS power levels (0.4W typ. static) * Rail-to-Rail output swing for increased noise margin * Military product compliant to MIL-STD-883, Class B
DESCRIPTION:
The FCT3245/A octal transceivers are built using advanced dual metal CMOS technology. These high-speed, low-power transceivers are ideal for synchronous communication between two busses (A and B). The direction control pin (DIR) controls the direction of data flow. The output enable pin (OE) overrides the direction control and disables both ports. All inputs are designed with hysteresis for improved noise margin. The FCT3245/A have series current limiting resistors. These offer low ground bounce, minimal undershoot, and controlled output fall times-reducing the need for external series terminating resistors.
FUNCTIONAL BLOCK DIAGRAM
PIN CONFIGURATIONS
DIR 1 2 3 4 5 6 7 8 9 10 P20-1 D20-1 SO20-2 SO20-7 SO20-8 & E20-1 20 19 18 17 16 15 14 13 12 11 Vcc OE B1 B2 B3 B4 B5 B6 B7 B8
DIR OE A1 B1 A2 B2 A3 B3 A4 B4 A5 B5 A6 B6 A7 B7 A8 B8
2650 drw 01
A1 A2 A3 A4 A5 A6 A7 A8 GND
DIP/SOIC/SSOP/QSOP/CERPACK TOP VIEW
DIR
VCC
A2
A1
OE
INDEX
2650 drw 02
32 A3 A4 A5 A6 A7 4 5 6 7 8 L20-2 1
20 19 18 17 16 15 14
B1 B2 B3 B4 B5
9 10 11 12 13
GND A8 B8 B7 B6
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
LCC TOP VIEW
2650 drw 03
MILITARY AND COMMERCIAL TEMPERATURE RANGES
(c)1996 Integrated Device Technology, Inc.
FEBRUARY 1996
DSC-2650/5
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IDT54/74FCT3245/A 3.3V CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN DESCRIPTION
Pin Names
FUNCTION TABLE(1)
Inputs
OE
DIR Ax Bx
Description Output Enable Input (Active LOW) Direction Control Input Side A Inputs or 3-State Outputs Side B Inputs or 3-State Outputs
2650 tbl 01
OE
L L H
DIR L H X
Outputs Bus B Data to Bus A Bus A Data to Bus B High Z State
2650 tbl 02
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care Z = High Impedance
ABSOLUTE MAXIMUM RATINGS(1)
Symbol Rating Commercial Military VTERM(2) Terminal Voltage -0.5 to +4.6 -0.5 to +4.6 with Respect to GND VTERM(3) Terminal Voltage -0.5 to +7.0 -0.5 to +7.0 with Respect to GND -0.5 to VTERM(4) Terminal Voltage -0.5 to with Respect to VCC + 0.5 VCC + 0.5 GND TA Operating -40 to +85 -55 to +125 Temperature TBIAS Temperature -55 to +125 -65 to +135 Under Bias TSTG Storage -55 to +125 -65 to +150 Temperature PT Power Dissipation 1.0 1.0 IOUT DC Output Current -60 to +60 -60 to +60 Unit V
CAPACITANCE (TA = +25C, f = 1.0MHz)
Symbol Parameter(1) CIN Input Capacitance CI/O I/O Capacitance Conditions VIN = 0V VOUT = 0V Typ. 3.5 4.0 Max. Unit 6.0 pF 8.0 pF
2650 lnk 04
V
V C C C W mA
NOTE: 1. This parameter is measured at characterization but not tested.
2650 lnk 03 NOTES: 1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. 2. Vcc terminals. 3. Input terminals. 4. Output and I/O terminals.
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IDT54/74FCT3245/A 3.3V CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: Commercial: TA = -40C to +85C, VCC = 2.7V to 3.6V; Military: TA = -55C to +125C, VCC = 2.7V to 3.6V
Symbol VIH VIL II H II L IOZH IOZL VIK IODH IODL VOH Parameter Input HIGH Level (Input pins) Input HIGH Level (I/O pins) Input LOW Level (Input and I/O pins) Input HIGH Current (Input pins)(6) Input HIGH Current (I/O pins)(6) Input LOW Current (Input pins)(6) VCC = Max. Input LOW Current (I/O pins)(6) High Impedance Output Current (3-State Output pins) (6) Clamp Diode Voltage Output HIGH Current Output LOW Current Output HIGH Voltage VCC = Max. VI = 5.5V VI = VCC VI = GND VI = GND VO = VCC VO = GND VCC = Min., IIN = -18mA VCC = 3.3V, VIN = VIH or VIL, VO = 1.5V(3) VCC = 3.3V, VIN = VIH or VIL, VO = 1.5V(3) VCC = Min. VIN = VIH or VIL VCC = 3.0V VIN = VIH or VIL VCC = Min. VIN = VIH or VIL IOH = -0.1mA IOH = -3mA IOH = -6mA MIL. IOH = -8mA COM'L. IOL = 0.1mA IOL = 16mA IOL = 24mA VCC = 3.0V IOL = 24mA VIN = VIH or VIL VCC = Max., VO = GND(3)
--
Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level
Min. 2.0 2.0 -0.5 -- -- -- -- -- -- -- -36 50 VCC-0.2 2.4 2.4 (5) -- -- -- -- -60 -- -- --
Typ.(2) -- --
--
Max. 5.5 VCC+0.5 0.8 1 1 1 1 1 1
-1.2
Unit V V A
-- -- -- -- -- -- -0.7
A V mA mA V
-60 90 -- 3.0 3.0 -- 0.2 0.3 0.3
-135
-110 200 -- -- -- 0.2 0.4 0.55 0.50 -240
--
VOL
Output LOW Voltage
V
IOS VH ICCL ICCH ICCZ
Short Circuit Current(4) Input Hysteresis Quiescent Power Supply Current
mA mV A
150 0.1 0.1
VCC = Max., VIN = GND or VCC
COM'L. MIL.
10 100
NOTES: 1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at Vcc = 3.3V, +25C ambient. 3. Not more than one output should be tested at one time. Duration of the test should not exceed one second. 4. This parameter is guaranteed but not tested. 5. VOH = VCC -0.6V at rated current. 6. The test limits for this parameter is 5A at TA = -55C.
2650 lnk 05
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IDT54/74FCT3245/A 3.3V CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS
Symbol ICC ICCD Parameter Quiescent Power Supply Current Dynamic Power Supply Current(4) VCC = Max. Test Conditions(1) VIN = VCC - 0.6V(3) VIN = VCC VIN = GND Min. -- -- Typ.(2) 2.0 60 Max. 30 85 Unit A A/ MHz
VCC = Max. Outputs Open OE = DIR = GND One Input Toggling 50% Duty Cycle VCC = Max. Outputs Open fi =10MHz 50% Duty Cycle
IC
Total Power Supply Current (6)
VIN = VCC VIN = GND VIN = VCC -0.6V VIN = GND VIN = VCC VIN = GND VIN = VCC -0.6V VIN = GND
--
0.6
0.9
mA
--
0.6
0.9
OE = DIR = GND
One Bit Toggling VCC = Max. Outputs Open fi = 2.5MHz 50% Duty Cycle OE = DIR = GND Eight Bits Toggling
--
1.2
1.7 (5)
--
1.2
1.8 (5)
NOTES: 1. For conditions shown as max. or min., use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 3.3V, +25C ambient. 3. Per TTL driven input; all other inputs at VCC or GND. 4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations. 5. Values for these conditions are examples of the ICC formula. These limits are guaranteed but not tested. 6. IC = IQUIESCENT + IINPUTS + IDYNAMIC IC = ICC + ICC DHNT + ICCD (fCPNCP/2 + fiNi) ICC = Quiescent Current (ICCL, ICCH and ICCZ) ICC = Power Supply Current for a TTL High Input DH = Duty Cycle for TTL Inputs High NT = Number of TTL Inputs at DH ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL) fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices) NCP = Number of Clock Inputs at fCP fi = Input Frequency Ni = Number of Inputs at fi
2650 tbl 06
SWITCHING CHARACTERISTICS OVER OPERATING RANGE(3)
FCT3245 Com'l. Symbol Parameter Condition(1) Min.(2) Max. Mil. Min.(2) Max. Com'l. Min.(2) Max. FCT3245A Mil. Min.(2) Max. Unit
tPLH tPHL tPZH tPZL tPHZ tPLZ tPZH tPZL tPHZ tPLZ
Propagation Delay A to B, B to A Output Enable Time OE to A or B Output Disable Time OE to A or B Output Enable Time DIR to A or B(4) Output Disable Time DIR to A or B(4)
CL = 50pF RL = 500
1.5 1.5 1.5 1.5 1.5
7.0 9.5 7.5 9.5 7.5
1.5 1.5 1.5 1.5 1.5
7.5 10.0 10.0 10.0 10.0
1.5 1.5 1.5 1.5 1.5
4.6 6.2 5.0 6.2 5.0
1.5 1.5 1.5 1.5 1.5
4.9 6.5 6.0 6.5 6.0
ns ns ns ns ns
2650 tbl 07 NOTES: 1. See test circuit and waveforms. 2. Minimum limits are guaranteed but not tested on Propagation Delays. 3. Propagation Delays and Enable/Disable times are with VCC = 3.3V 0.3V, Normal Range. For VCC = 2.7V to 3.6V, Extended Range, all Propagation Delays and Enable/Disable times should be degraded by 20%. 4. This parameter is guaranteed but not tested.
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IDT54/74FCT3245/A 3.3V CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
TEST CIRCUITS AND WAVEFORMS TEST CIRCUITS FOR ALL OUTPUTS
6V V
CC
SWITCH POSITION
Open GND
500 V Pulse Generator R
T IN
V D.U.T.
OUT
Test Open Drain Disable Low Enable Low Disable High Enable High All Other tests
Switch 6V
50pF C
L
500
SET-UP, HOLD AND RELEASE TIMES
DATA INPUT TIMING INPUT ASYNCHRONOUS CONTROL PRESET CLEAR ETC. SYNCHRONOUS CONTROL PRESET CLEAR CLOCK ENABLE ETC. tSU
tH
tREM
tSU
tH
PROPAGATION DELAY
3V 1.5V 0V VOH 1.5V VOL 3V 1.5V 0V
2650 drw 07
SAME PHASE INPUT TRANSITION tPLH OUTPUT tPLH OPPOSITE PHASE INPUT TRANSITION tPHL tPHL
GND Open
2650 lnk 08 DEFINITIONS: CL= Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.
2650 drw 04
PULSE WIDTH
3V 1.5V 0V 3V 1.5V 0V 3V 1.5V 0V 3V 1.5V 0V
2650 drw 05
LOW-HIGH-LOW PULSE tW HIGH-LOW-HIGH PULSE
1.5V
1.5V
2650 drw 06
ENABLE AND DISABLE TIMES
ENABLE CONTROL INPUT tPZL OUTPUT NORMALLY SWITCH 6V LOW tPZH OUTPUT NORMALLY HIGH SWITCH GND tPLZ 3V 1.5V tPHZ 0.3V 1.5V 0V VOH 0V DISABLE 3V 1.5V 0V 3V 0.3V VOL
2650 drw 08 NOTES: 1. Diagram shown for input Control Enable-LOW and input Control DisableHIGH. 2. Pulse Generator for All Pulses: Rate 1.0MHz; tF 2.5ns; tR 2.5ns. 3. If VCC is below 3V, input voltage swings should be adjusted not to exceed VCC.
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IDT54/74FCT3245/A 3.3V CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
ORDERING INFORMATION
IDT X XX FCT Temp. Range Family XX Device Type X Package X Process Blank B P D SO PY Q 245 245A 3 54 74 Commercial MIL-STD-883, Class B Plastic DIP (P20-1) CERDIP (D20-1) Small Outline IC (SO20-2) Shrink Small Outline Package (SO20-7) Quarter-size Small Outline Package (SO20-8) Non-Inverting Octal Bidirectional Transceiver
3.3Volt -55C to +125C -40C to +85C
2650 drw 09
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