74ABT16952 Datasheet, PDF (1/7 Pages) NXP Semiconductors – 16-bit registered transceiver 3-State

November 1993
Revised August 2001
74ABT16952
16-Bit Registered Transceiver with 3-STATE Outputs
General Description
The ABT16952 is a 16-bit registered transceiver. Two 8-bit
back to back registers store data flowing in both directions
between two bidirectional buses. Separate clock, clock
enable and 3-STATE output enable signals are provided for
each register. The output pins are guaranteed to source
32 mA and to sink 64 mA.
Features
s Separate clock, clock enable and 3-STATE output
enable provided for each register
s A and B output sink capability of 64 mA source capability
of 32 mA
s Guaranteed latchup protection
s High impedance glitch free bus loading during entire
power up and power down cycle
s Nondestructive hot insertion capability
Ordering Code:
Order Number Package Number
Package Description
74ABT16952CSSC
MS56A
56-Lead Shrink Small Outline Package (SSOP), JEDEC MO-118, 0.300" Wide
74ABT16952CMTD
MTD56
56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Devices also available in Tape and Reel. Specify by appending the letter suffix “X” to the ordering code.
Pin Descriptions
Connection Diagram
Pin Names
A₀–A₁₅
B₀–B₁₅
CPAB_n, CPBA_n
CEA_n, CEB_n
OEAB_n, OEBA_n
Description
Data Register A Inputs/
B-Register 3-STATE Outputs
Data Register B Inputs/
A-Register 3-STATE Outputs
Clock Pulse Inputs
Clock Enable
Output Enable Inputs
Output Control
OE
Internal
Q
Output
Function
H
X
Z
Disable Outputs
L
L
L
Enable Outputs
L
H
H
Register Function Table
(Applies to A or B Register)
Inputs
D
CP
CE
Internal
Q
Function
X
L
H
^X
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
H
NC Hold Data
L
L Load Data
L
H
Z = HIGH Impedance
= LOW-to-HIGH Transition
NC = No Change
© 2001 Fairchild Semiconductor Corporation DS011647
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