SN54ALS574B, SN54AS574, SN54AS575
SN74ALS574B, SN74ALS575A, SN74AS574, SN74AS575
OCTAL D-TYPE EDGE-TRIGGERED FLIP-FLOPS WITH 3-STATE OUTPUTS
SDAS165B – JUNE 1982 – REVISED JULY 1995
Copyright  1995, Texas Instruments Incorporated
1POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
• 3-State Buffer-Type Noninverting Outputs
Drive Bus Lines Directly
• Bus-Structured Pinout
• Buffered Control Inputs
• SN74ALS575A and ′AS575 Have
Synchronous Clear
• Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK), Standard Plastic (N, NT)
and Ceramic (J, JT) 300-mil DIPs, and
Ceramic Flat (W) Packages

description
These octal D-type edge-triggered flip-flops
feature 3-state outputs designed specifically for
bus driving. They are particularly suitable for
implementing buffer registers, I/O ports,
bidirectional bus drivers, and working registers.
The eight flip-flops enter data on the low-to-high
transition of the clock (CLK) input. The
SN74ALS575A, SN54AS575, and SN74AS575
may be synchronously cleared by taking the clear
(CLR) input low.
The output-enable (OE) input does not affect
internal operations of the flip-flops. Old data can
be retained or new data can be entered while the
outputs are in the high-impedance state.
The SN54ALS574B, SN54AS574, and
SN54AS575 are characterized for operation over
the full military temperature range of –55°C to
125°C. The SN74ALS574B, SN74ALS575A,
SN74AS574, and SN74AS575 are characterized
for operation from 0°C to 70°C.
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OE
1D
2D
3D
4D
5D
6D
7D
8D
GND
V
CC
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
CLK
SN54ALS574B, SN54AS574 ...J OR W PACKAGE
SN74ALS574B, SN74AS574 . . . DW OR N PACKAGE
(TOP VIEW)
3212019
910 11 1213
4
5
6
7
8
18
17
16
15
14
2Q
3Q
4Q
5Q
6Q
3D
4D
5D
6D
7D
2D 1D OE
8Q 7Q
1Q
8D
GND
CLK
V
CC
SN54ALS574B, SN54AS574 . . . FK PACKAGE
(TOP VIEW)
SN54AS575 . . . JT OR W PACKAGE
SN74ALS575A, SN74AS575 . . . DW OR NT PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
CLR
OE
1D
2D
3D
4D
5D
6D
7D
8D
NC
GND
V
CC
NC
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
CLK
NC
SN54AS575 ...FK PACKAGE
(TOP VIEW)
321
13 14
5
6
7
8
9
10
11
2Q
3Q
4Q
NC
5Q
6Q
7Q
2D
3D
4D
NC
5D
6D
7D
4
15 16 17 18
NC
GND
NC NC
CLK
8Q
1D OE CLR NC
28 27 26
25
24
23
22
21
20
19
12
8D
NC 1QV
CC
NC – No internal connection
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.