SN54ABT32318, SN74ABT32318
18ĆBIT TRIĆPORT UNIVERSAL BUS EXCHANGERS
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SCBS180A − JUNE 1992 − REVISED JULY 1994
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Members of the Texas Instruments
Widebus + Family
State-of-the-Art EPIC-ΙΙB BiCMOS Design
Significantly Reduces Power Dissipation
UBE (Universal Bus Exchanger)
Combines D-Type Latches and D-Type
Flip-Flops for Operation in Transparent,
Latched, or Clocked Mode
Latch-Up Performance Exceeds 500 mA
Per JEDEC Standard JESD-17
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Typical VOLP (Output Ground Bounce)
< 0.8 V at VCC = 5 V, TA = 25°C
Distributed VCC and GND Pin Configuration
Minimizes High-Speed Switching Noise
High-Drive Outputs (− 32-mA IOH,
64-mA IOL )
Bus Hold Inputs Eliminate the Need for
External Pullup/Pulldown Resistors
Packaged in 80-Pin Plastic Thin Quad
Flat (PN) Package With 12 × 12-mm Body
Using 0.5-mm Lead Pitch
C11
C10
C9
A1
SELA
OEA
OEC
SELC
LEC
CLKC
C18
C17
VCC
GND
C16
C15
C14
C13
C12
GND
SN74ABT32318 . . . PN PACKAGE
(TOP VIEW)
80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61
A2
A3
A4
GND
A5
A6
A7
A8
A9
VCC
GND
A10
A11
A12
A13
A14
GND
A15
A16
A17
1
60
2
59
3
58
4
57
5
56
6
55
7
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53
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52
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51
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49
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48
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C8
C7
C6
GND
C5
C4
C3
C2
C1
VCC
GND
B18
B17
B16
B15
B14
GND
B13
B12
B11
A18
CLKA
LEA
OEB
SELB
LEB
CLKB
B1
B2
VCC
GND
B3
B4
B5
B6
B7
GND
B8
B9
B10
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Widebus+, EPIC-ΙΙB, and UBE are trademarks of Texas Instruments Incorporated.
Copyright 1994, Texas Instruments Incorporated
UNLESS OTHERWISE NOTED this document contains PRODUCTION
DATA information current as of publication date. Products conform to
specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all
parameters.
• DALLAS, TEXAS 75265
• HOUSTON, TEXAS 77251−1443
POST OFFICE BOX 655303
POST OFFICE BOX 1443
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