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SNJ54ALS576BJ

Part # SNJ54ALS576BJ
Description Flip Flop D-Type Bus Interface Pos-Edge 3-ST 1-Element 20-
Category IC
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Texas Instruments
Date Code: 9632
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Technical Document


DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.

SN54ALS576B, SN54AS576
SN74ALS576B, SN74ALS577A, SN74AS576
OCTAL D-TYPE EDGE-TRIGGERED FLIP-FLOPS WITH 3-STATE OUTPUTS
SDAS065B – DECEMBER 1982 – REVISED JANUARY 1995
Copyright 1995, Texas Instruments Incorporated
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
• 3-State Buffer-Type Inverting Outputs Drive
Bus Lines Directly
• Bus-Structured Pinout
• Buffered Control Inputs
• SN74ALS577A Has Synchronous Clear
• Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK), Standard Plastic (N, NT)
and Ceramic (J) 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.
These flip-flops enter data on the low-to-high
transition of the clock (CLK) input.
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 disabled.
The SN54ALS576B and SN54AS576 are
characterized for operation over the full military
temperature range of –55°C to 125°C. The
SN74ALS576B, SN74ALS577A, and
SN74AS576 are characterized for operation from
0°C to 70°C.
SN54ALS576B, SN54AS576 ...J OR W PACKAGE
SN74ALS576B, SN74AS576 . . . DW OR N PACKAGE
(TOP VIEW)
SN54ALS576B, SN54AS576 . . . FK PACKAGE
(TOP VIEW)
SN74ALS577A . . . DW OR NT PACKAGE
(TOP VIEW)
NC – No internal connection
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
3212019
910111213
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
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
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
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.
SN54ALS576B, SN54AS576
SN74ALS576B, SN74ALS577A, SN74AS576
OCTAL D-TYPE EDGE-TRIGGERED FLIP-FLOPS WITH 3-STATE OUTPUTS
SDAS065B – DECEMBER 1982 – REVISED JANUARY 1995
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Function Tables
′ALS576B, ′AS576
(each flip-flop)
INPUTS
OUTPUT
OE CLK D
Q
L ↑ H L
L ↑ LH
LLX
Q
0
HXX Z
SN74ALS577A
(each flip-flop)
INPUTS
OUTPUT
OE CLR CLK D
Q
L L ↑ X H
L H ↑ HL
LH↑LH
LHLX
Q
0
HXXX Z
logic symbols
†
OE
1D
2
1D
3
2D
4
3D
5
4D
6
5D
11
CLK
19
18
17
16
15
14
13
12
7
6D
8
7D
9
8D
EN
1
C1
OE
1D
3
1D
4
2D
5
3D
6
4D
7
5D
14
CLK
22
21
20
19
18
17
16
15
8
6D
9
7D
10
8D
EN
2
C1
CLR
1R
1
′ALS576B, ′AS576 SN74ALS577A
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
†
These symbols are in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
Pin numbers shown for the ′ALS576B and ′AS576 are for the DW,
J, N, and W packages.
Pin numbers shown for the SN74ALS577A are for the DW and NT
packages.
SN54ALS576B, SN54AS576
SN74ALS576B, SN74ALS577A, SN74AS576
OCTAL D-TYPE EDGE-TRIGGERED FLIP-FLOPS WITH 3-STATE OUTPUTS
SDAS065B – DECEMBER 1982 – REVISED JANUARY 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
1
CLR
′ALS576B, ′AS576 SN74ALS577A
Pin numbers shown are for the DW, J, N, and W packages. Pin numbers shown are for the DW 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
: SN54ALS576B –55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74ALS576B, SN74ALS577A 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
SN54ALS576B
SN74ALS576B
SN74ALS577A
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
f
lk
Clock frequency
′ALS576B 0 22 0 30
MHz
f
clock
Clock
freq
u
enc
y
SN74ALS577A
0 30
MH
z
t
Pulse duration
′ALS576B, CLK high or low 25 16.5
ns
t
w
P
u
lse
d
u
ration
SN74ALS577A, CLK high or low 16.5
ns
t
Set p time before CLK↑
Data 15 15
ns
t
su
S
etup t
i
me
b
e
f
ore
CLK↑
SN74ALS577A CLR 15
ns
t
h
Hold time after CLK↑
Data 4 0
ns
t
h
H
o
ld
t
i
me a
f
ter
CLK↑
SN74ALS577A CLR 0
ns
T
A
Operating free-air temperature –55 125 0 70 °C
123456NEXT
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