SN54ALS841, SN54AS841, SN54ALS842, SN54AS842
SN74ALS841, SN74AS841, SN74ALS842, SN74AS842
10-BIT BUS INTERFACE D-TYPE LATCHES WITH 3-STATE OUTPUTS
SDAS059B – D2910, DECEMBER 1983 – REVISED MAY 1986
•
3-State Buffer-Type Outputs Drive
Bus-Lines Directly
•
•
Power-Up High-Impedance State
Package Options Include Plastic Small
Outline Packages, Both Plastic and
Ceramic Chip Carriers, and Standard
Plastic and Ceramic 300-mil DIPs
•
•
Bus-Structured Pinout
Provide Extra Bus Driving Latches
Necessary for Wider Address/Data Paths or
Buses with Parity
•
Dependable Texas Instruments Quality and
Reliability
•
Buffered Control Inputs to Reduce DC
Loading
description
These 10-bit latches feature 3-state outputs designed specifically for driving highly-capacitive or relatively
low-impedance loads. They are particularly suitable for implementing buffer registers, I/O ports, bidirectional
bus drivers, and working registers.
The ten latches are transparent D-type. The ’ALS841 and ’AS841 have noninverting data (D) inputs. The
’ALS842 and ’AS842 have inverting D inputs.
SN54ALS841, SN54AS841 . . . FK PACKAGE
SN74ALS841, SN74AS841 . . . FN PACKAGE
SN54ALS841, SN54AS841 . . . JT PACKAGE
SN74ALS841, SN74AS841 . . . DW OR NT PACKAGE
(TOP VIEW)
(TOP VIEW)
OC
1D
2D
3D
4D
5D
6D
7D
8D
V
CC
1
24
23
22
21
20
19
18
17
16
15
14
13
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
9Q
10Q
C
2
4
3
2 1 28 27 26
3
5
25 3Q
3D
4D
5D
NC
6D
7D
8D
4
6
4Q
5Q
NC
6Q
7Q
8Q
24
23
22
21
20
19
5
7
6
8
7
9
8
10
11
9
9D
10D
GND
10
11
12
12 13 14 15 16 17 18
SN54ALS842, SN54AS842 . . . FK PACKAGE
SN74ALS842, SN74AS842 . . . FN PACKAGE
SN54ALS842, SN54AS842 . . . JT PACKAGE
SN74ALS842, SN74AS842 . . . DW OR NT PACKAGE
(TOP VIEW)
(TOP VIEW)
OC
1D
2D
3D
4D
5D
6D
7D
8D
V
CC
1
24
23
22
21
20
19
18
17
16
15
14
13
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
9Q
10Q
C
2
4
3
2 1 28 27 26
3
5
25 3Q
3D
4D
5D
NC
6D
7D
8D
4
6
4Q
5Q
NC
6Q
7Q
8Q
24
23
22
21
20
19
5
7
6
8
7
9
8
10
11
9
9D
10D
GND
10
11
12
12 13 14 15 16 17 18
Copyright 1986, Texas Instruments Incorporated
5BASIC
PRODUCTION DATA information is 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.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265