74ACT11470 Datasheet, PDF (1/7 Pages) Texas Instruments – 8-BIT REGISTERED BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

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• Inputs Are TTL-Voltage Compatible
• Flow-Through Architecture Optimizes
PCB Layout
• Center-Pin V_CC and GND Configuration
Minimizes High-Speed Switching Noise
• EPIC  (Enhanced-Performance Implanted
CMOS) 1-µm Process
• 500-mA Typical Latch-Up Immunity
at 125°C
• Package Options Include Plastic Small-
Outline Packages, Ceramic Chip Carriers,
and Standard Ceramic 300-mil DIPs
description
The ′ACT11470 is an 8-bit registered bus
transceiver that contains two sets of D-type
flip-flops for temporary storage of data flowing in
either direction. Separate clock (CLKAB or
CLKBA) and output-enable (OEAB or OEBA)
inputs are provided for each register to permit
independent control in either direction of data flow.
54ACT11470, 74ACT11470
8ĆBIT REGISTERED BUS TRANSCEIVERS
WITH 3ĆSTATE OUTPUTS
SCAS207 − D4016, APRIL 1993
54ACT11470 . . . JT PACKAGE
74ACT11470 . . . DW PACKAGE
(TOP VIEW)
CEBA 1
A1 2
A2 ³
A3 ⁴
A4 ⁵
GND ⁶
GND ⁷
GND ⁸
GND ⁹
A5 ¹⁰
A6 ¹¹
A7 ¹²
A8 ¹³
CEAB ¹⁴
28 OEBA
27 CLKBA
26 _B1
25 _B2
24 _B3
23 _B4
22 _VCC
21 _VCC
20 _B5
19 _B6
18 _B7
17 _B8
16 _CLKAB
15 _OEAB
54AC11470 . . . FK PACKAGE
(TOP VIEW)
The A-to-B enable (CEAB) input must be low in
order to enter data from A or to output data to B.
If both CEAB and CLKAB are low, then the B port
presents the level of the A port prior to the most
recent low-to-high transition of CLKAB. Data flow
from B to A is similar, but requires the use of
CEBA, CLKBA, and OEBA inputs.
To avoid false clocking of the flip-flops, CEAB and
CEBA should not be switched from low to high
while CLK is low.
B1
CLKBA
OEBA
CEBA
A1
A2
A3
4 3 2 1 28 27 26
5
25
6
24
7
23
8
22
9
21
10
20
11
19
12 13 14 15 16 17 18
B7
B8
CLKAB
OEAB
CEAB
A8
A7
The 54ACT11470 is characterized for operation
over the full military temperature range of − 55°C
to 125°C. The 74ACT11470 is characterized for
operation from −40°C to 85°C.
FUNCTION TABLE†
INPUTS
OUTPUT
CEAB CLKAB OEAB A
B
H
X
X
X
Z
X
X
H
X
Z
L
L
L
X
B0‡
L
↑
L
L
L
L
↑
L
H
H
† _{A-to-B data flow is shown: B-to-A flow is similar but}
uses CEBA, CLKBA, and OEBA.
‡ _{Output level before the indicated steady-state input}
conditions were established.
EPIC is a trademark of 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.
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Copyright  1993, Texas Instruments Incorporated
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