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SCAS198A − OCTOBER 1990 − REVISED APRIL 1996
54ACT16475 . . . WD PACKAGE
74ACT16475 . . . DL PACKAGE
(TOP VIEW)
D
D
D
D
D
D
D
D
Members of the Texas Instruments
Widebus Family
Inputs Are TTL-Voltage Compatible
3-State Inverting Outputs
1OEAB
1OEBA
1CLKBA
1B1
1
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
Flow-Through Architecture Optimizes
PCB Layout
1CLKAB
1A1
2
3
GND
1A2
GND
1B2
4
Distributed V
Minimizes High-Speed Switching Noise
and GND Pin Configuration
CC
5
1A3
1B3
6
EPIC (Enhanced-Performance Implanted
CMOS) 1-µm Process
500-mA Typical Latch-Up Immunity at
V
V
7
CC
CC
1A4
1A5
1A6
GND
1A7
1A8
1A9
2A1
2A2
2A3
GND
2A4
2A5
2A6
1B4
1B5
1B6
GND
1B7
1B8
1B9
2B1
2B2
2B3
GND
2B4
2B5
2B6
8
9
125°C
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Packaged in Plastic 300-mil Shrink
Small-Outline (DL) Packages Using 25-mil
Center-to-Center Pin Spacings and 380-mil
Fine-Pitch Ceramic Flat (WD) Packages
Using 25-mil Center-to-Center Pin Spacings
description
The ’ACT16475 are 18-bit registered transceivers
that contain two sets of D-type flip-flops for
temporary storage of data flowing in either
direction. They can be used as two 9-bit
transceivers or one 18-bit transceiver. Separate
clock (CLKAB and CLKBA) and output-enable
(OEAB or OEBA) inputs are provided for each
register to permit independent control in either
direction of data flow.
V
V
CC
CC
2A7
2A8
GND
2A9
2B7
2B8
GND
2B9
2CLKBA
2OEBA
2CLKAB
2OEAB
Data at the A inputs meeting the setup time
requirements is transferred to the B outputs on the
positive-going edge of CLKAB. With OEAB low,
the 3-state B outputs are enabled and reflect the
inverted A data. Data flow from B to A is similar but
requires the use of the CLKBA and OEBA inputs.
The 74ACT16475 is packaged in TI’s shrink small-outline package, which provides twice the I/O pin count and
functionality of standard small-outline packages in the same printed-circuit-board area.
The 54ACT16475 is characterized for operation over the full military temperature range of −55°C to 125°C. The
74ACT16475 is characterized for operation from −40°C to 85°C.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
EPIC and Widebus are trademarks of Texas Instruments Incorporated.
Copyright 1996, Texas Instruments Incorporated
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1
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