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19-1125; Rev 0; 9/96
Single-Channel CardBus and PCMCIA VCC/VPP Power-Switching Network
_______________General Description
The MAX1602 DC power-switching IC contains a network of low-resistance MOSFET switches that deliver selectable VCC and VPP voltages to a single CardBus or PC Card host socket. Key features include lowresistance switches, small packaging, soft-switching action, and compliance with PCMCIA specifications for 3V/5V switching. 3.3V-only power switching for fast, 32-bit CardBus applications is supported in two ways: low-resistance 3.3V switches allow high 3.3V load currents (up to 1A); and completely independent internal charge pumps let the 3.3V switch operate normally, even if the +5V and +12V supplies are disconnected or turned off to conserve power. The internal charge pumps are regulating types that draw reduced input current when the VCC switches are static. Power consumption is automatically reduced to 11A max when the outputs are high-Z or GND. Other key features include guaranteed specifications for output current limit level, and guaranteed specifications for output rise/fall times (in compliance with PCMCIA specifications). Reliability is enhanced by thermal-overload protection, accurate current limiting, an overcurrent-fault flag output, and undervoltage lockouts. The CMOS/TTL-logic interface is flexible, and can tolerate logic input levels in excess of the positive supply rail. The MAX1602 fits a complete CardBus/PCMCIA switch into a space-saving, 16-pin QSOP package.
____________________________Features
o Supports a Single PC Card/CardBus Socket o 1A, 0.25 Max 3.3V VCC Switch 1A, 0.25 Max 5V VCC Switch o Soft Switching for Low Inrush Surge Current o Overcurrent Protection o Overcurrent/Thermal-Fault Flag Output o Thermal Shutdown at Tj = +150C o Independent Internal Charge Pumps o Break-Before-Make Switching Action o 11A Max Standby Supply Current o 5V and 12V Not Required for Low-RDS(ON) 3.3V Switching o Complies with PCMCIA 3V/5V Switching Specifications o Super-Small 16-Pin QSOP Package o Code Compatible with: Cirrus CL-PD67XX Family Databook DB86184 Intel 82365SL (industry-standard coding)
MAX1602
__________Simplified Block Diagram
12IN
VPP
________________________Applications
Data Loggers Handy-Terminals Docking Stations PCMCIA Read/Write Drives
CONTROL INPUTS VX VY VY
MAX1602
VCC VCC VCC VCC VDD DECODE LOGIC CODE SELECT OVERCURRENT AND THERMAL SHUTDOWN FAULT CODE
______________Ordering Information
PART MAX1602EEE TEMP. RANGE -40C to +85C PIN-PACKAGE 16 QSOP
GND
Pin Configuration appears on last page.
________________________________________________________________ Maxim Integrated Products
1
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Single-Channel CardBus and PCMCIA VCC/VPP Power-Switching Network MAX1602
ABSOLUTE MAXIMUM RATINGS
Inputs/Outputs to GND (VX, VY, VCC) (Note 1) ..........................................-0.3V, +6V VPP Input/Output to GND (12IN, VPP) (Note 1) ............................................-0.3V, +15V Logic Inputs to GND (A0VCC, A1VCC, A0VPP, A1VPP) (Note 1)........................................-0.3V, +6V CODE Input to GND ........................................-0.3V, (VY + 0.3V) VCC Output Current (Note 2)...................................................4A VPP Output Current (Note 2).............................................260mA VCC Short Circuit to GND ..........................................Continuous VPP Short Circuit to GND ...........................................Continuous Continuous Power Dissipation (TA = +70C) QSOP (derate 8.3mW/C above +70C) ....................667mW Operating Temperature Range MAX1602EEE .................................................-40C to +85C Storage Temperature Range .............................-65C to +160C Lead Temperature (soldering, 10sec) .............................+300C
Note 1: There are no parasitic diodes between any of these pins, so there are no power-up sequencing restrictions (for example, logic input signals can be applied even if all of the supply voltage inputs are grounded). Note 2: VCC and VPP outputs are internally current limited. See the Electrical Characteristics.
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
(VY = 3.3V, VX = 5V, 12IN = 12V, TA = 0C to +85C, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER POWER-SUPPLY SECTION Input Voltage Range VX, VY 12IN VY falling edge 12IN falling edge 12IN rising edge VX falling edge VY Standby Supply Current VX Standby Supply Current 12IN Standby Supply Current VY Quiescent Supply Current VX Quiescent Supply Current 12IN Quiescent Supply Current VCC SWITCHES Operating Output Current Range On-Resistance, VY Switches On-Resistance, VX Switches Output Current Limit VCC, VX = VY = 3V to 5.5V 12IN = 0V to 13V, VY = 3V, VX = 0V to 5.5V, ISWITCH = 1A, TA = +25C 12IN = 0V to 13V, VX = 4.5V, VY = 0V to 5.5V, ISWITCH = 1A, TA = +25C VCC 1.2 0 0.09 0.09 1 0.25 0.25 4 A A All switches 0V or high-Z, control inputs = 0V or VY, TA = +25C VX all switches 0V or high-Z, control inputs = 0V or VY, TA = +25C All switches 0V or high-Z, control inputs = 0V or VY, TA = +25C Any combination of VY switches on, control inputs = 0V or VY, no VCC loads Control inputs = 0V or VY, no VCC loads VPP 12V switches on, control inputs = 0V or VY, no VPP loads 20 10 5 3.0 11 2.4 1.8 5.0 1.4 5.5 13 2.8 10.0 2.8 11 1 1 200 50 100 A A A A A A V CONDITIONS MIN TYP MAX UNITS
2.6 3.0 8.0 1.9 3
Undervoltage Lockout Threshold
V
2
_______________________________________________________________________________________
Single-Channel CardBus and PCMCIA VCC/VPP Power-Switching Network
ELECTRICAL CHARACTERISTICS (continued)
(VY = 3.3V, VX = 5V, 12IN = 12V, TA = 0C to +85C, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER Output Sink Current Output Leakage Current Output Propagation Delay Plus Rise Time Output Rise Time Output Propagation Delay Plus Fall Time Output Fall Time VPP SWITCHES Operating Output Current Range On-Resistance, 12V Switches On-Resistance, VPP = VCC Switches Output Current Limit Output Sink Current Output Leakage Current Output Propagation Delay Plus Rise Time Output Rise Time Output Propagation Delay Plus Fall Time Output Fall Time INTERFACE AND LOGIC SECTION FAULT Signal Propagation Delay FAULT Output Low Voltage FAULT Output Leakage Current Thermal Shutdown Threshold Logic Input Low Voltage Logic Input High Voltage Code Input Low Voltage Code Input High Voltage Code Input Mid-Level Voltage Logic Input Bias Current VCC or VPP, load step to FAULT output, 50% point to 50% point (Note 3) ISINK = 1mA, low state V FAULT = 5.5V, high state Hysteresis = 20C (Note 4) __VCC, __VPP __VCC, __VPP "Intel" code "Cirrus" code "Databook" code __VCC, __VPP, code 1.5 0 VY - 0.4 1.2 -1 0.4 VY VY - 1.2 1 -0.5 150 0.6 1 0.4 0.5 s V A C V V V V V A VPP 12IN = 11.6V, ISWITCH = 100mA, TA = +25C Programmed to VX (5V) or VY (3.3V), TA = +25C VPP programmed to 12V VPP < 0.4V, programmed to 0V state VPP forced to 0V, high-Z state, TA = +25C VPP, 0V to 12IN, CL = 0.1F, 50% of input to 90% of output, TA = +25C VPP, 0V to 12IN, CL = 0.1F, 10% to 90% points, TA = +25C VPP, 12IN to 0V, CL = 0.1F, 50% of input to 10% of output, TA = +25C VPP, 12IN to 0V, CL = 0.1F, RL = 100 90% to 10% points 100 130 10 0.1 1.2 600 9 6 60 10 30 0 0.70 3 200 120 1 6 260 mA mA mA A ms s ms ms CONDITIONS VCC < 0.4V, programmed to 0V state VCC forced to 0V, high-Z state, TA = +25C VCC, 0V to VX or VY, CL = 30F, RL = 25, 50% of input to 90% of output, TA = +25C VCC, 0V to VX or VY, CL = 1F, RL = open circuit, 10% to 90% points, TA = +25C VCC, VX or VY to 0V, CL = 30F, RL = open circuit, 50% of input to 10% of output, TA = +25C VCC, VX or VY to 0V, CL = 1F, RL = 25, 90% to 10% points 100 MIN 10 1 2 1200 90 6 150 10 10 TYP MAX UNITS mA A ms s ms ms
MAX1602
3
_______________________________________________________________________________________
Single-Channel CardBus and PCMCIA VCC/VPP Power-Switching Network MAX1602
ELECTRICAL CHARACTERISTICS
(VY = 3.3V, VX = 5V, 12IN = 12V, TA = -40C to +85C, unless otherwise noted.) PARAMETER POWER-SUPPLY SECTION Input Voltage Range VX, VY 12IN VY falling edge, hysteresis = 1% 12IN falling edge 12IN rising edge VX, VY falling edge VY Standby Supply Current VX Standby Supply Current 12IN Standby Supply Current VY Quiescent Supply Current VX Quiescent Supply Current 12IN Quiescent Supply Current FAULT Output Low Voltage Logic Input Low Voltage Logic Input High Voltage All switches 0V or high-Z, control inputs = 0V or VY VX, all switches 0V or high-Z, control inputs = 0V or VY, TA = TMIN to TMAX All switches 0V or high-Z, control inputs = 0V or VY Any combination of VY switches on, control inputs = 0V or VY, no VCC loads Any combination of VX switches on, control inputs = 0V or high-Z, no VCC loads 12V switches on, control inputs = 0V or VY, no VPP loads ISINK = 1mA, low state __VCC, __VPP __VCC, __VPP 1.6 3.0 11 2.3 1.8 5 1.4 10 2.9 30 15 15 200 50 100 0.4 0.6 A A A A A A V V V 5.5 13 2.9 V CONDITIONS MIN TYP MAX UNITS
Undervoltage Lockout Threshold
V
Note 3: Not production tested. Note 4: Thermal limit not active in standby state (all switches programmed to GND or high-Z state).
4
_______________________________________________________________________________________
Single-Channel CardBus and PCMCIA VCC/VPP Power-Switching Network
__________________________________________Typical Operating Characteristics
(VY = 3.3V, VX = 5V, 12IN = 12V, TA = +25C, unless otherwise noted.) VCC SWITCHING (RISE)
MAX1602 TOC-01
MAX1602
VCC SWITCHING (RISE)
3 VCC (V) 2 1 0 CONTROL 5 INPUT 0 (V)
MAX1602 TOC-02
6 VCC (V) 4 2 0 CONTROL INPUT 5 (V) 0
500s/div CL = 30F, RL = 25
CL = 1F, RL =
500s/div
VCC SWITCHING (FALL)
MAX1602 TOC-03
VCC SWITCHING (FALL)
6 VCC (V) 4 2 0 CONTROL 5 INPUT 0 (V)
MAX1602 TOC-04
6 VCC (V) 4 2 0 CONTROL 5 INPUT 0 (V)
CL = 33F, RL =
10ms/div CL = 1F, RL = 25
20ms/div
VPP SWITCHING (RISE)
MAX1602 TOC-05
VPP SWITCHING (FALL)
15 10 VPP (V) 5 0 CONTROL 5 INPUT 0 (V)
MAX1602 TOC-06
15 10 VPP (V) 5 0 CONTROL 5 INPUT 0 (V)
CL = 0.1F, RL =
200s/div
CL = 0.1F, RL =
2ms/div
_______________________________________________________________________________________
5
Single-Channel CardBus and PCMCIA VCC/VPP Power-Switching Network MAX1602
_____________________________Typical Operating Characteristics (continued)
(VY = 3.3V, VX = 5V, 12IN = 12V, TA = +25C, unless otherwise noted.)
VCC CURRENT LIMITING
MAX1602 TOC-07
INPUT CURRENT (VCC OUTPUT SHORTED)
2.0 1.5 IVY (A) 1.0 0.5 0
MAX1602 TOC-08
4 VCC (V) 2 0
2ms/div CL = 1F, RESISTIVE OVERLOAD, RL = 1
1ms/div
VPP CURRENT LIMITING
MAX1602 TOC-14
INPUT CURRENT (VPP OUTPUT SHORTED)
10 5 VPP (V) 0 300 I12IN (mA) 200 100 0 100s/div RL = 0.1
MAX1600/3 TOC-15
10 VPP (V) 5 0
2ms/div CL = 1F, RL = 50
6
_______________________________________________________________________________________
Single-Channel CardBus and PCMCIA VCC/VPP Power-Switching Network
_____________________________Typical Operating Characteristics (continued)
(VY = 3.3V, VX = 5V, 12IN = 12V, TA = +25C, unless otherwise noted.)
12IN ON-RESISTANCE vs. CURRENT
MAX1602-09
MAX1602
12IN ON-RESISTANCE vs. TEMPERATURE
MAX1602-10
VX SUPPLY CURRENT vs. INPUT VOLTAGE
0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0
MAX1602 TOC-11
680 675 670 12IN RON (m) 665 660 655 650 645 640 0 20 40 60 80 100
850 800 750 700 650 600 550 500 ILOAD = 100mA
0.9 VX, VY SUPPLY CURRENT (A)
120
12IN RON (m)
-40
-20
0
20
40
60
80
100
0
1
2
3
4
5
6
CURRENT (mA)
TEMPERATURE (C)
INPUT VOLTAGE (V)
12IN SUPPLY CURRENT vs. INPUT VOLTAGE
MAX1602 TOC-17
VY SUPPLY CURRENT vs. INPUT VOLTAGE
45 VY SUPPLY CURRENT (A) 40 35 30 25 20 15 10 5 0 SHUTDOWN NORMAL OPERATION
MAX1602-018
7 12IN SUPPLY CURRENT (A) 6 5 4 3 2 1 0 0 2 4 6 8 10
50
12
0
1
2
3
4
5
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
VX ON-RESISTANCE vs. VCC LOAD CURRENT
MAX1602-12
VY ON-RESISTANCE vs. VCC LOAD CURRENT
120 110 VX RON (m) TA = +85C
MAX1602-13
130 120 110 VX RON (m) 100 90 80 TA = -40C 70 60 0 200 400 600 800 TA = +25C TA = +85C
130
100 90 80 70 60
TA = +25C
TA = -40C
1000
0
200
400
600
800
1000
VCC LOAD CURRENT (mA)
VCC LOAD CURRENT (mA)
_______________________________________________________________________________________
7
Single-Channel CardBus and PCMCIA VCC/VPP Power-Switching Network MAX1602
______________________________________________________________Pin Description
PIN 1 2 3 4, 6, 7, 9 5 8, 10 11 12 13 14 15 16 NAME GND 12IN VPP VCC VX VY A0VPP A1VPP A0VCC A1VCC CODE FAULT Ground +12V Supply Voltage Input VPP Output VCC Output. Connect all four VCC pins together. VX Supply Voltage Input. Input range is +3.0V to +5.5V. VX is normally connected to 5V. VY and Logic Supply Voltage Inputs. VY pins must be connected together. Input range is +3V to +5.5V. VY is normally connected to 3.3V. VPP Control Input (see Logic Truth Tables). VPP Control Input (see Logic Truth Tables). VCC Control Input (see Logic Truth Tables). VCC Control Input (see Logic Truth Tables). Three-Level Code-Select Input (see Logic Truth Tables): Low = Standard "Intel" code, High = "Cirrus" code, Mid-Supply = "Databook" code (Figure 4). Fault-Detection Output. FAULT goes low during current limit, undervoltage lockout, or thermal limit. FAULT is an open-drain output that requires an external pull-up resistor. FUNCTION
__________________________________________________________Logic Truth Tables
Table 1. Standard "Intel" Code (82365SL), CODE = GND
A1VCC A0VCC A1VPP A0VPP 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 VCC GND GND GND GND VY VY VY VY VX VX VX VX VY VY VY VY VPP GND GND GND GND GND VCC 12IN High-Z GND VCC 12IN High-Z GND VCC 12IN High-Z MODE STBY STBY STBY STBY Active Active Active Active Active Active Active Active Active Active Active Active
Table 2. "Cirrus" Code, CODE = High (VY)
A1VCC A0VCC A1VPP A0VPP 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 VCC High-Z High-Z High-Z High-Z VX VX VX VX VY VY VY VY GND GND GND GND VPP High-Z High-Z High-Z High-Z GND VCC 12IN High-Z GND VCC 12IN High-Z GND GND GND GND MODE STBY STBY STBY STBY Active Active Active Active Active Active Active Active STBY STBY STBY STBY
STBY = Standby Mode
STBY = Standby Mode
8
_______________________________________________________________________________________
Single-Channel CardBus and PCMCIA VCC/VPP Power-Switching Network
_________Logic Truth Tables (cont.)
Table 3. "Databook" Code, CODE = Mid-Supply (VY/2)
A1VCC A0VCC 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 AVPP 0 1 0 1 0 1 0 1 A0VPP X X X X X X X X VCC GND VY GND VX VY VY VX VX VPP High-Z 12IN GND 12IN VCC GND VCC GND MODE STBY Active STBY Active Active Active Active Active
_______________Detailed Description
The MAX1602 power-switching IC contains a network of low-resistance MOSFET switches that deliver selectable VCC and VPP voltages to two CardBus or PC Card host socket. Figure 1 is the detailed block diagram. The power-input pins (VY, VX, 12IN) are completely independent, however, power must always be applied to VY for proper operation. Low inrush current is guaranteed by controlled switch rise times. VCC's 100s minimum output rise time is 100% tested with a 1F capacitive load, and VPP's 1ms minimum rise time is guaranteed with a 0.1F load. These respective capacitive loads are chosen as worst-case card-insertion parameters. The internal switching control allows VCC and VPP rise times to be controlled, and makes them nearly
MAX1602
STBY = Standby Mode, X = Don't Care
VB12 1 12IN VPP
MAX1602
CHARGE PUMP CURRENT LIMIT
6
40
VY VY
VB3 0.25 VCC VCC VCC VCC
CHARGE PUMP
CURRENT LIMIT
VX
VB5
0.25 40
CHARGE PUMP
CURRENT LIMIT
FAULT VDD CONTROL INPUTS DECODE LOGIC AND UVLO
SHDN THERMAL SHUTDOWN GND
Figure 1. Detailed Block Diagram
_______________________________________________________________________________________ 9
Single-Channel CardBus and PCMCIA VCC/VPP Power-Switching Network MAX1602
independent of resistive and capacitive loads (see risetime photos in the Typical Operating Characteristics). Fall times are a function of loading, and are compensated by internal circuitry. Power savings is automatic: internal charge pumps draw very low current when the VCC switches are static. Standby mode reduces switch supply current to 11A.
Overcurrent Protection
Peak detecting circuitry protects both the VCC and VPP switches against overcurrent conditions. When current through any switch exceeds the internal current limit (4A for VCC switches and 200mA for VPP switches) the switch turns off briefly, then turns on again at the controlled rise rate. If the overcurrent condition lasts more than 2s, the FAULT output goes low. FAULT is not latched. A continuous short-circuit condition results in a pulsed output current and a pulsed FAULT output until thermal shutdown is reached. FAULT is open-drain and requires an external pull-up resistor.
Operating Modes
The MAX1602 is compatible with the Cirrus CL-PD67XX, Databook DB86184, and Intel 82365SL PC Card Interface Controllers (PCIC). Four control inputs select the internal switches' positions and the operating modes according to the input code. Select the proper code format for the chosen controller with the CODE input pin (see Pin Description and Tables 1, 2, and 3). CODE reconfigures the logic decoder to one of three interface controllers: Low = Standard "Intel" code (Figure 3) High = "Cirrus" code (Figure 2) Mid-supply = "Databook" code (Figure 4) An additional 1A (3A max) of VY supply current will flow if CODE = mid-supply (VY/2). The MAX1602 has two operating modes: normal and standby. Normal mode supplies the selected outputs with their appropriate supply voltages. Standby mode places all switches at ground, high impedance, or a combination of the two.
Thermal Shutdown
If the IC junction temperature rises above +150C, the thermal shutdown circuitry opens all switches, including the GND switches, and FAULT is pulled low. When the temperature falls below +130C, the switches turn on again at the controlled rise rate. If the overcurrent condition remains, the part cycles between thermal shutdown and overcurrent.
Undervoltage Lockout
If the VX switch input voltage drops below 1.9V, the associated switch turns off and FAULT goes low. For example, if VY is 3.3V and VX is 0V, and if the interface controller selects VY, the VCC output will be 3.3V. If VX is selected, VCC changes to a high-impedance output and FAULT goes low. When a voltage is initially applied to 12IN, it must be greater than 8V to allow the switch to operate. Operation continues until the voltage falls below 2V (the VPP output is high impedance). When VY drops to less than 2.6V, all switches are turned off and the VCC and VPP outputs are high impedance.
TO PC CARD SOCKET
VCC SOCKET INTERFACE CIRRUS LOGIC CL-PD6720 CL-PD6722 CL-PD6729
VCC VPP +3.3V VY VY
MAX1602
TO PC CARD SOCKET
__________Applications Information
Supply Bypassing
Bypass the VY, VX, and 12IN inputs with ceramic 0.1F capacitors. Bypass the VCC and VPP outputs with a 0.1F capacitor for noise reduction and ESD protection.
+5V +12V
VX 12IN CODE GND
A0VPP A1VPP A0VCC A1VCC
A:VPP_VCC A:VPP_PGM A:VCC_5 A:VCC_3 GND
Figure 2. Application with Cirrus Logic Interface
10
______________________________________________________________________________________
Single-Channel CardBus and PCMCIA VCC/VPP Power-Switching Network MAX1602
TO SOCKETS TO PC CARD SOCKET VCC VCC VPP VCC VPP SOCKET INTERFACE SOCKET INTERFACE VCC
+3.3V
VY VY
MAX1602
A0VPP A1VPP
82365SL DF
A:VPP_EN0 A:VPP_EN1
TO PC CARD SOCKET
+3.3V
VY VY
MAX1602
DB87144
TO PC CARD SOCKET
A1VPP +5V 1M A0VCC +12V 12IN CODE GND A1VCC A:VCC_EN0 A:VCC_EN1 ISA BUS +12V 12IN CODE GND VX A0VCC A1VCC +5V VX
A:_VCTL1 A:_VCTL2 A:_VCTL0
1M NOTE: A0VPP, PIN 11 ON THE MAX1602, IS TIED TO GND.
Figure 3. Application with Intel Interface
Figure 4. Block Diagram of the Databook DB87144 PCI to CardBus Controller Interface to the MAX1602
______________________________________________________________________________________
11
Single-Channel CardBus and PCMCIA VCC/VPP Power-Switching Network MAX1602
__________________Pin Configuration
TOP VIEW
GND 1 12IN 2 VPP 3 VCC 4 VX 5 VCC 6 VCC 7 VY 8 16 FAULT 15 CODE 14 A1VCC
___________________Chip Information
TRANSISTOR COUNT: 1452
MAX1602
13 A0VCC 12 A1VPP 11 A0VPP 10 VY 9 VCC
QSOP
________________________________________________________Package Information
DIM INCHES MILLIMETERS MAX MIN MIN MAX 0.068 0.061 1.55 1.73 0.004 0.0098 0.127 0.25 0.061 0.055 1.40 1.55 0.012 0.008 0.20 0.31 0.0075 0.0098 0.19 0.25 SEE VARIATIONS 0.157 0.150 3.81 3.99 0.25 BSC 0.635 BSC 0.244 0.230 5.84 6.20 0.016 0.010 0.25 0.41 0.035 0.016 0.41 0.89 SEE VARIATIONS SEE VARIATIONS 8 0 0 8 DIM PINS D S D S D S D S 16 16 20 20 24 24 28 28 INCHES MILLIMETERS MIN MAX MIN MAX 0.189 0.196 4.80 4.98 0.0020 0.0070 0.05 0.18 0.337 0.344 8.56 8.74 0.0500 0.0550 1.27 1.40 0.337 0.344 8.56 8.74 0.0250 0.0300 0.64 0.76 0.386 0.393 9.80 9.98 0.0250 0.0300 0.64 0.76
21-0055A
D A e B
A1
S
A A1 A2 B C D E e H h L N S
E
H h x 45 A2
N E C L
QSOP QUARTER SMALL-OUTLINE PACKAGE
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.
12 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 (c) 1996 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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