Texas Instruments SN74ALS533ADWR, SN74ALS533AN, SN74ALS533ADW, SN74AS533ADW, SN74AS533ADWR Datasheet
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SN74ALS533A, SN74AS533A
OCTAL D-TYPE TRANSPARENT LATCHES
WITH 3-STATE OUTPUTS
SDAS270 – DECEMBER 1994
• Eight Latches in a Single Package
• 3-State Bus-Driving Inverting Outputs
• Full Parallel Access for Loading
• Buffered Control Inputs
• pnp Inputs Reduce dc Loading on
Data Lines
• Package Options Include Plastic
Small-Outline (DW) Packages and Standard
Plastic (N) 300-mil DIPs
description
DW OR N PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OE
1Q
1D
2D
2Q
3Q
3D
4D
4Q
GND
V
8Q
8D
7D
7Q
6Q
6D
5D
5Q
LE
CC
These 8-bit D-type transparent latches feature
3-state outputs designed specifically for driving
highly capacitive or relatively low-impedance
loads. They are particularly suitable for
implementing buffer registers, I/O ports,
bidirectional bus drivers, and working registers.
While latch-enable (LE) input is high, the Q
taken low, the Q
outputs are latched at the inverses of the levels set up at the D inputs. The SN74ALS533A and
outputs follow the complements of the data (D) inputs. When LE is
SN74AS533A are functionally equivalent to the SN74ALS373A and SN74AS373, except for having inverted
outputs.
A buffered output-enable (OE
) input places the eight outputs in either a normal logic state (high or low logic
levels) or a high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines
significantly. The high-impedance state and increased drive provide the capability to drive bus lines without
interface or pullup components.
OE
does not affect the internal operations of the latches. Old data can be retained or new data can be entered
while the outputs are off.
The SN74ALS533A and SN74AS533A are characterized for operation from 0°C to 70°C.
FUNCTION TABLE
(each latch)
INPUTS
OE LE D
L H H L
L HL H
LLX Q
HXX Z
OUTPUT
Q
0
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 1994, Texas Instruments Incorporated
1
SN74ALS533A, SN74AS533A
OCTAL D-TYPE TRANSPARENT LATCHES
WITH 3-STATE OUTPUTS
SDAS270 – DECEMBER 1994
logic symbol
1
OE
11
LE
3
1D
4
2D
7
3D
8
4D
13
5D
14
6D
17
7D
18
8D
†
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
†
EN
C1
1D
1
12
15
16
19
logic diagram (positive logic)
1
OE
11
LE
12
2
1Q
5
2Q
6
3Q
9
4Q
5Q
2
1Q
5
2Q
6
3Q
9
4Q
5Q
6Q
7Q
8Q
1D
2D
3D
4D
5D
3
4
7
8
13
C1
1D
C1
1D
C1
1D
C1
1D
C1
1D
15
16
19
6D
7D
8D
14
17
18
C1
1D
C1
1D
C1
1D
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
Input voltage, V
Voltage applied to a disabled 3-state output 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, T
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.
7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CC
7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I
: SN74ALS533A 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A
6Q
7Q
8Q
‡
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
UNIT
PARAMETER
TEST CONDITIONS
UNIT
V
V
VOLV
V
V
SN74ALS533A, SN74AS533A
OCTAL D-TYPE TRANSPARENT LATCHES
WITH 3-STATE OUTPUTS
SDAS270 – DECEMBER 1994
recommended operating conditions
SN74ALS533A
MIN NOM MAX
V
CC
V
IH
V
IL
I
OH
I
OL
t
w
t
su
t
h
T
A
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
†
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.
Supply voltage 4.5 5 5.5 V
High-level input voltage 2 V
Low-level input voltage 0.8 V
High-level output current –2.6 mA
Low-level output current 24 mA
Pulse duration, LE high 15 ns
Setup time, data before LE↓ 15 ns
Hold time, data after LE↓ 7 ns
Operating free-air temperature 0 70 °C
SN74ALS533A
MIN TYP†MAX
V
IK
OH
I
OZH
I
OZL
I
I
I
IH
I
IL
I
O
I
CC
‡
VCC = 4.5 V, II = –18 mA –1.5 V
VCC = 4.5 V to 5.5 V, IOH = –0.4 mA VCC –2
VCC = 4.5 V, IOH = –2.6 mA 2.4 3.2
= 4.5
CC
VCC = 5.5 V, VO = 2.7 V 20 µA
VCC = 5.5 V, VO = 0.4 V –20 µA
VCC = 5.5 V, VI = 7 V 0.1 mA
VCC = 5.5 V, VI = 2.7 V 20 µA
VCC = 5.5 V, VI = 0.4 V –0.1 mA
VCC = 5.5 V, VO = 2.25 V –30 –112 mA
VCC = 5.5 V
IOL = 12 mA 0.25 0.4
IOL = 24 mA 0.35 0.5
Outputs high 10 17
Outputs low 17 26
Outputs disabled 18.5 28
mA
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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