ꢀꢁꢂ ꢃ ꢄꢅ ꢆꢇ ꢃ ꢇ ꢄꢈ ꢀꢁꢉ ꢃ ꢄ ꢅꢆ ꢇꢃ ꢇꢄ
ꢊ ꢋꢆꢄꢌ ꢅꢍꢀ ꢆ ꢎꢄꢁꢀ ꢋꢏꢐ ꢑꢏꢎꢀ ꢄꢁꢒ ꢎꢏꢓ ꢐ ꢀ ꢆꢏ ꢎꢀ
ꢔ ꢐꢆ ꢕ ꢖ ꢗꢀꢆꢄꢆ ꢏ ꢊ ꢍꢆ ꢘ ꢍꢆꢀ
SCBS069H − JULY 1991 − REVISED MAY 2004
D
Typical V
(Output Ground Bounce)
D
Latch-Up Performance Exceeds 500 mA Per
JEDEC Standard JESD-17
OLP
<1 V at V
= 5 V, T = 25°C
CC
A
D
High-Drive Outputs (−32-mA I , 64-mA I
)
D
ESD Protection Exceeds JESD 22
− 2000-V Human-Body Model (A114-A)
− 200-V Machine Model (A115-A)
OH
OL
D
I
Supports Partial-Power-Down Mode
off
Operation
SN54ABT646A . . . JT OR W PACKAGE
SN74ABT646A . . . DB, DGV, DW, NS, NT, OR PW PACKAGE
(TOP VIEW)
SN54ABT646A . . . FK PACKAGE
(TOP VIEW)
1
24
23
22
21
20
19
18
17
16
15
14
13
CLKAB
SAB
DIR
A1
A2
A3
A4
A5
A6
A7
A8
GND
V
CC
2
CLKBA
SBA
OE
B1
B2
B3
B4
B5
B6
B7
4
3
2
1
28 27 26
25
3
A1
A2
A3
NC
A4
OE
B1
B2
NC
B3
B4
B5
5
6
7
8
9
4
24
23
22
21
20
19
5
6
7
8
A5 10
11
9
A6
12 13 14 15 16 17 18
10
11
12
B8
NC − No internal connection
description/ordering information
These devices consist of bus-transceiver circuits, D-type flip-flops, and control circuitry arranged for multiplexed
transmission of data directly from the input bus or from the internal registers. Data on the A or B bus is clocked
into the registers on the low-to-high transition of the appropriate clock (CLKAB or CLKBA) input. Figure 1
illustrates the four fundamental bus-management functions that can be performed with the ’ABT646A devices.
ORDERING INFORMATION
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
†
PACKAGE
T
A
PDIP − NT
SOIC − DW
Tube
SN74ABT646ANT
SN74ABT646ADW
SN74ABT646ADWR
SN74ABT646ANSR
SN74ABT646ADBR
SN74ABT646APW
SN74ABT646APWR
SN74ABT646ADGVR
SNJ54ABT646AJT
SNJ54ABT646AW
SNJ54ABT646AFK
SN74ABT646ANT
Tube
ABT646A
Tape and reel
Tape and reel
Tape and reel
Tube
SOP − NS
ABT646A
AB646A
−40°C to 85°C
SSOP − DB
TSSOP − PW
AB646A
Tape and reel
Tape and reel
Tube
TVSOP − DGV
CDIP − JT
AB646A
SNJ54ABT646AJT
SNJ54ABT646AW
SNJ54ABT646AFK
−55°C to 125°C
CFP − W
Tube
LCCC − FK
Tube
†
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.
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Copyright 2004, Texas Instruments Incorporated
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