Document
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-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
SN54ALS574B, SN54AS574 . . . J OR W PACKAGE SN74ALS574B, SN74AS574 . . . DW OR N PACKAGE
(TOP VIEW)
OE 1 1D 2 2D 3 3D 4 4D 5 5D 6 6D 7 7D 8 8D 9 GND 10
20 VCC 19 1Q 18 2Q 17 3Q 16 4Q 15 5Q 14 6Q 13 7Q 12 8Q 11 CLK
description
SN54ALS574B, SN54AS574 . . . FK PACKAGE (TOP VIEW)
2D 1D OE VCC 1Q
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.
3 2 1 20 19
3D 4
18 2Q
4D 5
17 3Q
5D 6
16 4Q
6D 7
15 5Q
7D 8
14 6Q
9 10 11 12 13
8D GND CLK
8Q 7Q
SN54AS575 . . . JT OR W PACKAGE SN74ALS575A, SN74AS575 . . . DW OR NT PACKAGE
(TOP VIEW)
CLR 1 OE 2 1D 3 2D 4 3D 5 4D 6 5D 7 6D 8 7D 9 8D 10 NC 11
GND 12
24 VCC 23 NC 22 1Q 21 2Q 20 3Q 19 4Q 18 5Q 17 6Q 16 7Q 15 8Q 14 CLK 13 NC
SN54AS575 . . . FK PACKAGE (TOP VIEW)
1D OE CLR NC VCC NC 1Q
4 3 2 1 28 27 26
2D 5
25 2Q
3D 6
24 3Q
4D 7
23 4Q
NC 8
22 NC
5D 9
21 5Q
6D 10
20 6Q
7D 11
19 7Q
12 13 14 15 16 17 18
8D NC GND NC NC CLK 8Q
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.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1995, Texas Instruments Incorporated 1
SN54ALS574B, SN54AS574, SN54AS575 SN74ALS574B, SN74ALS575A, SN74AS574, SN74AS575 OCTAL D-TYPE EDGE-TRIGGERED FLIP-FLOPS WITH 3-STATE OUTPUTS
SDAS165B – JUNE 1982 – REVISED JULY 1995
Function Tables
SN54ALS574B, SN74ALS574B, SN54AS574, SN74AS574 (each flip-flop)
INPUTS OE CLK D
OUTPUT Q
L
↑
H
H
L
↑
L
L
L
L
X
Q0
H
X
X
Z
SN74ALS575A, SN54AS575, SN74AS575 (each flip-flop)
INPUTS
OUTPUT
OE CLR CLK D
Q
L
L
↑
X
L
L
H
↑
H
H
L
H
↑
L
L
L
H
L
X
Q0
H
X
H
X
Z
logic symbols†
SN54ALS574B, SN74ALS574B, SN54AS574, SN74AS574
SN74ALS575A, SN54AS575, SN74AS575
1 OE
11 CLK
2 1D
3 2D
4 3D
5 4D
6 5D
7 6D
8 7D
9 8D
EN C1
1D
19 1Q
18 2Q
17 3Q
16 4Q
15 5Q
14 6Q
13 7Q
12 8Q
2 OE
14 CLK
1 CLR
3 1D
4 2D
5 3D
6 4D
7 5D
8 6D
9 7D
10 8D
EN C1
1R
1D
† 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.
22 1Q
21 2Q
20 3Q
19 4Q
18 5Q
17 6Q
16 7Q
15 8Q
2
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
SN54ALS574B, SN54AS574, SN54AS575
SN74ALS574B, SN74ALS575A, SN74AS574, SN74AS575 OCTAL D-TYPE EDGE-TRIGGERED FLIP-FLOPS WITH 3-STATE OUTPUTS
SDAS165B – JUNE 1982 – REVISED JULY 1995
logic diagrams (positive logic)
SN54ALS574B, SN74ALS574B, SN54AS574, SN74AS574
SN74ALS575A, SN54AS575, SN74AS575
1 OE
11 CLK
2 1D
C1 1D
19 1Q
2 OE
14 CLK
1 CLR
3 1D
C1 1D
22 1Q
To Seven Other Channels
Pin numbers shown are for the DW, J, JT, N, and NT packages.
To Seven Other Channels
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Voltage applied to a disabled 3-state output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Operating free-air temperature range, TA: SN54ALS574B . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 125°C
SN74ALS574B, SN74ALS575A . . . . . . . . . . . . . . . . . 0°C to 70°C Storage temperature range . . . . . .