Texas Instruments SN54AS574J, SN54AS575JT, SN54ALS574BJ, SNJ54AS574FK, SNJ54AS574J Datasheet
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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
1
POST 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
9
10 111213
4
5
6
7
8
18
17
16
15
14
2Q
3Q
4Q
5Q
6Q
3D
4D
5D
6D
7D
2D1DOE
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
1516 17
18
NC
GND
NC
NC
CLK
8Q
1DOECLR
NC
28 27 26
25
24
23
22
21
20
19
12
8D
NC
1Q
V
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.
SN54ALS574B, SN54AS574, SN54AS575
SN74ALS574B, SN74ALS575A, SN74AS574, SN74AS575
OCTAL D-TYPE EDGE-TRIGGERED FLIP-FLOPS WITH 3-STATE OUTPUTS
SDAS165B – JUNE 1982 – REVISED JULY 1995
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Function Tables
SN54ALS574B, SN74ALS574B, SN54AS574, SN74AS574
(each flip-flop)
INPUTS
OUTPUT
OE CLK D
Q
L ↑ H H
L ↑ LL
LLX Q
0
HXX Z
SN74ALS575A, SN54AS575, SN74AS575
(each flip-flop)
INPUTS
OUTPUT
OE CLR CLK D
Q
L L ↑ X L
L H ↑ HH
LH↑LL
LHLX Q
0
HXHX Z
logic symbols
†
OE
1D
2
1D
3
2D
4
3D
5
4D
6
5D
11
CLK
1Q
19
2Q
18
3Q
17
4Q
16
5Q
15
6Q
14
7Q
13
8Q
12
7
6D
8
7D
9
8D
EN
1
C1
OE
1D
3
1D
4
2D
5
3D
6
4D
7
5D
14
CLK
1Q
22
2Q
21
3Q
20
4Q
19
5Q
18
6Q
17
7Q
16
8Q
15
8
6D
9
7D
10
8D
EN
2
C1
CLR
1R
1
SN54ALS574B, SN74ALS574B,
SN54AS574, SN74AS574
SN74ALS575A, SN54AS575,
SN74AS575
†
These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
Pin numbers shown are for the DW, J, JT, N, and NT packages.
SN54ALS574B, SN54AS574, SN54AS575
SN74ALS574B, SN74ALS575A, SN74AS574, SN74AS575
OCTAL D-TYPE EDGE-TRIGGERED FLIP-FLOPS WITH 3-STATE OUTPUTS
SDAS165B – JUNE 1982 – REVISED JULY 1995
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic diagrams (positive logic)
OE
CLK
1D
1Q
1
11
2
19
To Seven Other Channels
1D
C1
OE
CLK
1D
1Q
2
14
3
22
To Seven Other Channels
1D
C1
SN54ALS574B, SN74ALS574B,
SN54AS574, SN74AS574
SN74ALS575A, SN54AS575,
SN74AS575
1
CLR
Pin numbers shown are for the DW, J, JT, N, and NT packages.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage, V
CC
7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, V
I
7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage applied to a disabled 3-state output 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, T
A
: SN54ALS574B –55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74ALS574B, SN74ALS575A 0°C to 70°C. . . . . . . . . . . . . . . . .
Storage temperature range –65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
recommended operating conditions
SN54ALS574B
SN74ALS574B
SN74ALS575A
UNIT
MIN NOM MAX MIN NOM MAX
V
CC
Supply voltage 4.5 5 5.5 4.5 5 5.5 V
V
IH
High-level input voltage 2 2 V
V
IL
Low-level input voltage 0.7 0.8 V
I
OH
High-level output current –1 –2.6 mA
I
OL
Low-level output current 12 24 mA
′ALS574B 0 28 0 35
f
clock
Clock frequenc
y
SN74ALS575A
0 30
MH
z
′ALS574B, CLK high or low 16.5 14
twPulse duration
SN74ALS575A, CLK high or low 16.5
ns
Data 15 15
t
su
S
etup time before
CLK↑
SN74ALS575A, CLR 15
ns
Data 4 0
t
h
Hold ti
me after
CLK↑
SN74ALS575A, CLR 0
ns
T
A
Operating free-air temperature –55 125 0 70 °C
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