ꢀꢁꢂ ꢃ ꢄꢅ ꢆꢇ ꢈ ꢉ ꢊ ꢉ ꢋ ꢄꢌ ꢀꢁ ꢍꢃ ꢄꢅ ꢆꢇ ꢈꢉ ꢊꢉꢋ ꢄ
ꢇ ꢊ ꢎꢅꢏ ꢆ ꢅꢐꢀ ꢎꢏꢁꢆ ꢑꢒꢓꢄꢔꢑ ꢓ ꢕꢏ ꢖ ꢎꢓ ꢕꢗ ꢖꢀ
ꢘ ꢏꢆ ꢙ ꢋ ꢎꢀꢆꢄꢆ ꢑ ꢗ ꢐꢆ ꢖꢐ ꢆꢀ
SCBS666B − JULY 1996 − REVISED JUNE 2004
SN54ABT162823A . . . WD PACKAGE
SN74ABT162823A . . . DGG OR DL PACKAGE
(TOP VIEW)
D
D
Members of the Texas Instruments
Widebus Family
Output Ports Have Equivalent 25-Ω Series
Resistors So No External Resistors Are
Required
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
1CLR
1OE
1Q1
GND
1Q2
1Q3
1CLK
1CLKEN
1D1
GND
1D2
2
D
D
D
D
D
Typical V
(Output Ground Bounce)
OLP
3
<1 V at V
= 5 V, T = 25°C
4
CC
A
5
High-Impedance State During Power Up
and Power Down
6
1D3
7
V
V
I
and Power-Up 3-State Support Hot
CC
CC
off
8
1Q4
1Q5
1Q6
GND
1Q7
1Q8
1Q9
2Q1
2Q2
2Q3
GND
2Q4
2Q5
2Q6
1D4
1D5
1D6
GND
1D7
1D8
1D9
2D1
2D2
2D3
GND
2D4
2D5
2D6
Insertion
9
Distributed V
High-Speed Switching Noise
and GND Pins Minimize
CC
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Flow-Through Architecture Optimizes PCB
Layout
description/ordering information
These 18-bit bus-interface flip-flops feature
3-state outputs designed specifically for driving
highly capacitive or relatively low-impedance
loads. They are particularly suitable for
implementing wider buffer registers, I/O ports,
bidirectional bus drivers with parity, and working
registers.
V
V
CC
CC
2Q7
2Q8
GND
2Q9
2OE
2CLR
2D7
2D8
GND
2D9
2CLKEN
2CLK
The ’ABT162823A devices can be used as two
9-bit flip-flops or one 18-bit flip-flop. With the
clock-enable (CLKEN) input low, the D-type
flip-flops enter data on the low-to-high transitions
of the clock. Taking CLKEN high disables the
clock buffer, thus latching the outputs. Taking the
clear (CLR) input low causes the Q outputs to go
low independently of the clock.
ORDERING INFORMATION
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
†
PACKAGE
T
A
Tube
SN74ABT162823ADL
SSOP − DL
ABT162823A
Tape and reel
SN74ABT162823ADLR
SN74ABT162823ADGGR
SNJ54ABT162823AWD
−40°C to 85°C
−55°C to 125°C
TSSOP − DGG Tape and reel
CFP − WD Tube
ABT162823A
SNJ54ABT162823AWD
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
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.
Widebus is a trademark of Texas Instruments.
Copyright 2004, Texas Instruments Incorporated
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1
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