SDAS065B − DECEMBER 1982 − REVISED JANUARY 1995
•
•
•
•
SN54ALS576B, SN54AS576 . . . J OR W PACKAGE
SN74ALS576B, SN74AS576 . . . DW OR N PACKAGE
(TOP VIEW)
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
OE
1D
2D
3D
4D
5D
6D
7D
8D
GND
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.
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
VCC
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
CLK
2D
1D
OE
VCC
SN54ALS576B, SN54AS576 . . . FK PACKAGE
(TOP VIEW)
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.
4
3 2 1 20 19
18
5
17
6
16
7
15
8
14
9 10 11 12 13
2Q
3Q
4Q
5Q
6Q
8D
GND
CLK
8Q
7Q
3D
4D
5D
6D
7D
1Q
•
SN74ALS577A . . . DW OR NT PACKAGE
(TOP VIEW)
CLR
OE
1D
2D
3D
4D
5D
6D
7D
8D
NC
GND
1
24
2
23
3
22
4
21
5
20
6
19
7
18
8
17
9
16
10
15
11
14
12
13
VCC
NC
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
CLK
NC
NC − No internal connection
Copyright 1995, Texas Instruments Incorporated
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• DALLAS, TEXAS 75265
• HOUSTON, TEXAS 77251−1443
POST OFFICE BOX 655303
POST OFFICE BOX 1443
1
SDAS065B − DECEMBER 1982 − REVISED JANUARY 1995
Function Tables
′ALS576B, ′AS576
(each flip-flop)
INPUTS
OE
CLK
D
OUTPUT
Q
L
↑
H
L
L
↑
L
H
L
L
X
Q0
H
X
X
Z
SN74ALS577A
(each flip-flop)
INPUTS
OE
CLR
CLK
D
OUTPUT
Q
L
L
↑
X
H
L
H
↑
H
L
L
H
↑
L
H
L
H
L
X
Q0
H
X
X
X
Z
logic symbols†
′ALS576B, ′AS576
OE
CLK
1D
2D
3D
4D
5D
6D
7D
8D
1
11
2
SN74ALS577A
EN
OE
C1
1D
CLK
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
CLR
1Q
2Q
1D
3Q
2D
4Q
3D
5Q
4D
6Q
5D
7Q
6D
8Q
7D
8D
† 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.
2
2
14
1
3
C1
1R
1D
22
4
21
5
20
6
19
7
18
8
17
9
16
10
15
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
Pin numbers shown for the SN74ALS577A are for the DW and NT
packages.
•
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POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
•
EN
SDAS065B − DECEMBER 1982 − REVISED JANUARY 1995
logic diagrams (positive logic)
′ALS576B, ′AS576
SN74ALS577A
1
OE
OE
11
CLK
CLK
C1
2
1D
19
CLR
2
14
1
1Q
1D
C1
1D
3
22
1Q
1D
To Seven Other Channels
To Seven Other Channels
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, 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: 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
SN74ALS576B
SN74ALS577A
SN54ALS576B
UNIT
MIN
NOM
MAX
MIN
NOM
MAX
4.5
5
5.5
4.5
5
5.5
VCC
VIH
Supply voltage
VIL
IOH
Low-level input voltage
0.7
0.8
V
High-level output current
−1
−2.6
mA
IOL
Low-level output current
12
24
mA
High-level input voltage
fclock
Clock frequency
tw
Pulse duration
tsu
Setup time before CLK↑
th
Hold time after CLK↑
TA
Operating free-air temperature
2
′ALS576B
0
2
22
SN74ALS577A
′ALS576B, CLK high or low
25
V
0
30
0
30
ns
16.5
15
15
ns
15
SN74ALS577A CLR
Data
4
0
ns
0
SN74ALS577A CLR
−55
•
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
•
MHz
16.5
SN74ALS577A, CLK high or low
Data
V
125
0
70
°C
3
SDAS065B − DECEMBER 1982 − REVISED JANUARY 1995
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TYP†
MIN
VIK
VCC = 4.5 V,
VCC = 4.5 V to 5.5 V,
II = − 18 mA
IOH = − 0.4 mA
VCC = 4.5 V
IOH = − 1 mA
IOH = − 2.6 mA
VOL
VCC = 4.5 V
IOL = 12 mA
IOL = 24 mA
IOZH
IOZL
VCC = 5.5 V,
VCC = 5.5 V,
VO = 2.7 V
VO = 0.4 V
II
IIH
VCC = 5.5 V,
VCC = 5.5 V,
VI = 7 V
VI = 2.7 V
IIL
IO‡
VCC = 5.5 V,
VCC = 5.5 V,
VI = 0.4 V
VO = 2.25 V
ICC
VCC = 5.5 V
VOH
SN74ALS576B
SN74ALS577A
SN54ALS576B
TEST CONDITIONS
MAX
TYP†
MIN
−1.2
VCC − 2
2.4
UNIT
MAX
−1.2
V
VCC − 2
3.3
V
2.4
0.25
−20
3.2
0.4
0.25
0.4
0.35
0.5
V
µA
20
20
−20
−20
µA
0.1
0.1
mA
20
20
µA
−0.2
−0.2
mA
−112
mA
−112
−30
Outputs high
10
18
10
18
Outputs low
15
24
15
24
mA
Outputs disabled
16
30
16
30
† All typical values are at VCC = 5 V, TA = 25°C.
‡ The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.
switching characteristics (see Figure 1)
PARAMETER
FROM
(INPUT)
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
R1 = 500 Ω,
R2 = 500 Ω,
TA = MIN to MAX§
TO
(OUTPUT)
SN54ALS576B
MIN
fmax
MAX
22
tPLH
tPHL
CLK
Any Q
tPZH
tPZL
OE
Any Q
tPHZ
tPLZ
OE
Any Q
SN74ALS576B
MIN
MAX
UNIT
SN74ALS577A
MIN
30
30
24
3
14
4
14
4
20
4
14
4
14
4
24
3
18
4
18
3
23
4
18
4
18
2
14
1
10
2
10
3
29
2
15
3
15
•
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
•
MHz
4
§ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
4
MAX
ns
ns
ns
SDAS065B − DECEMBER 1982 − REVISED JANUARY 1995
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: SN54AS576 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55°C to 125°C
SN74AS576 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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
SN54AS576
SN74AS576
MIN
NOM
MAX
MIN
NOM
MAX
4.5
5
5.5
4.5
5
5.5
UNIT
VCC
VIH
Supply voltage
VIL
IOH
Low-level input voltage
0.8
0.8
V
High-level output current
−12
−15
mA
IOL
fclock*
Low-level output current
tw*
Pulse duration
tsu*
th*
High-level input voltage
2
2
32
Clock frequency
0
100
0
CLK high
5
4
CLK low
4
2
Setup time, data before CLK↑
3
2
Hold time, data after CLK↑
3
2
V
48
mA
125
MHz
TA
Operating free-air temperature
−55
125
0
70
* On products compliant to MIL-STD-883, Class B, this parameter is based on characterization data but is not production tested.
•
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
•
V
ns
ns
ns
°C
5
SDAS065B − DECEMBER 1982 − REVISED JANUARY 1995
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
VIK
SN54AS576
TYP†
MAX
TEST CONDITIONS
MIN
VCC = 4.5 V,
VCC = 4.5 V to 5.5 V,
II = − 18 mA
IOH = − 2 mA
VCC = 4.5 V
IOH = − 12 mA
IOH = − 15 mA
VOL
VCC = 4.5 V
IOL = 32 mA
IOL = 48 mA
IOZH
IOZL
VCC = 5.5 V,
VCC = 5.5 V,
VO = 2.7 V
VO = 0.4 V
II
IIH
VCC = 5.5 V,
VCC = 5.5 V,
VI = 7 V
VI = 2.7 V
VOH
−1.2
VCC − 2
2.4
−1.2
3.2
V
V
2.4
0.29
3.3
0.5
0.33
0.5
50
50
µA
−50
µA
0.1
0.1
mA
20
20
µA
−3
−2
−0.5
−0.5
VI = 0.4 V
IO‡
VCC = 5.5 V,
VO = 2.25 V
Outputs high
77
125
77
125
ICC
VCC = 5.5 V
Outputs low
84
135
84
135
Outputs disabled
84
135
84
135
−30
V
−50
VCC = 5.5 V,
All others
UNIT
VCC − 2
D
IIL
SN74AS576
TYP†
MAX
MIN
−112
−30
−112
mA
mA
mA
† All typical values are at VCC = 5 V, TA = 25°C.
‡ The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.
switching characteristics (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
R1 = 500 Ω,
R2 = 500 Ω,
TA = MIN to MAX§
SN54AS576
SN74AS576
MIN
fmax*
MAX
100
tPLH
tPHL
CLK
Any Q
tPZH
tPZL
OE
Any Q
tPHZ
tPLZ
OE
Any Q
MIN
MAX
125
•
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
•
MHz
3
11
3
8
4
11
4
9
2
7
2
6
3
11
3
10
2
7
2
6
2
7
2
6
* On products compliant to MIL-STD-883, Class B, this parameter is based on characterization data but is not production tested.
§ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
6
UNIT
ns
ns
ns
SDAS065B − DECEMBER 1982 − REVISED JANUARY 1995
PARAMETER MEASUREMENT INFORMATION
SERIES 54ALS/74ALS AND 54AS/74AS DEVICES
7V
RL = R1 = R2
VCC
S1
RL
R1
Test
Point
From Output
Under Test
CL
(see Note A)
From Output
Under Test
RL
Test
Point
CL
(see Note A)
CL
(see Note A)
LOAD CIRCUIT FOR
BI-STATE
TOTEM-POLE OUTPUTS
3.5 V
High-Level
Pulse
1.3 V
R2
LOAD CIRCUIT
FOR 3-STATE OUTPUTS
LOAD CIRCUIT
FOR OPEN-COLLECTOR OUTPUTS
3.5 V
Timing
Input
Test
Point
From Output
Under Test
1.3 V
1.3 V
0.3 V
0.3 V
tsu
Data
Input
tw
th
3.5 V
1.3 V
3.5 V
Low-Level
Pulse
1.3 V
0.3 V
1.3 V
0.3 V
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
VOLTAGE WAVEFORMS
PULSE DURATIONS
3.5 V
Output
Control
(low-level
enabling)
1.3 V
1.3 V
0.3 V
tPZL
Waveform 1
S1 Closed
(see Note B)
tPLZ
3.5 V
Input
tPHZ
1.3 V
0.3 V
tPHL
tPLH
VOH
In-Phase
Output
VOL
0.3 V
1.3 V
1.3 V
VOL
tPLH
tPHL
VOH
1.3 V
1.3 V
[3.5 V
1.3 V
tPZH
Waveform 2
S1 Open
(see Note B)
1.3 V
VOH
Out-of-Phase
Output
(see Note C)
0.3 V
[0 V
1.3 V
1.3 V
VOL
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS
NOTES: A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. When measuring propagation delay items of 3-state outputs, switch S1 is open.
D. All input pulses have the following characteristics: PRR ≤ 1 MHz, tr = tf = 2 ns, duty cycle = 50%.
E. The outputs are measured one at a time with one transition per measurement.
Figure 1. Load Circuits and Voltage Waveforms
•
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
•
7
PACKAGE OPTION ADDENDUM
www.ti.com
18-Nov-2023
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
Samples
(4/5)
(6)
84001022A
ACTIVE
LCCC
FK
20
55
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
84001022A
SNJ54ALS
576BFK
8400102RA
ACTIVE
CDIP
J
20
20
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
8400102RA
SNJ54ALS576BJ
Samples
Samples
SN74ALS576BDW
LIFEBUY
SOIC
DW
20
25
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
ALS576B
SN74ALS576BDWR
ACTIVE
SOIC
DW
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
ALS576B
Samples
SN74ALS576BN
ACTIVE
PDIP
N
20
20
RoHS &
Non-Green
NIPDAU
N / A for Pkg Type
0 to 70
SN74ALS576BN
Samples
SN74ALS576BNSR
ACTIVE
SO
NS
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
ALS576B
Samples
SN74ALS577ADWR
ACTIVE
SOIC
DW
24
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
ALS577A
Samples
SN74AS576N
ACTIVE
PDIP
N
20
20
RoHS &
Non-Green
NIPDAU
N / A for Pkg Type
0 to 70
SN74AS576N
Samples
SNJ54ALS576BFK
ACTIVE
LCCC
FK
20
55
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
84001022A
SNJ54ALS
576BFK
SNJ54ALS576BJ
ACTIVE
CDIP
J
20
20
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
8400102RA
SNJ54ALS576BJ
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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