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DM74LS533
Octal Transparent Latch with 3-STATE Outputs
The DM74LS533 consists of eight latches with 3-STATE outputs for bus organized system
applications. The flip-flops appear transparent to the data when Latch Enable (LE) is HIGH. When
LE is LOW, the data that meets the setup times is latched. Data appears on the bus when the
Output Enable (OE) is LOW. When OE is HIGH the bus output is in the high impedance state. The
DM74LS533 is the same as the DM74LS373, except that the outputs are inverted.
Rochester Electronics
Manufactured Components
Rochester branded components are
manufactured using either die/wafers
purchased from the original suppliers
or Rochester wafers recreated from the
original IP. All recreations are done with
the approval of the OCM.
Parts are tested using original factory
test programs or Rochester developed
test solutions to guarantee product
meets or exceeds the OCM data sheet.
Quality Overview
•
•
•
•
ISO-9001
AS9120 certification
Qualified Manufacturers List (QML) MIL-PRF-38535
• Class Q Military
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• Rochester is a critical supplier to DLA and
meets all industry and DLA standards.
Rochester Electronics, LLC is committed to supplying
products that satisfy customer expectations for
quality and are equal to those originally supplied by
industry manufacturers.
The original manufacturer’s datasheet accompanying this document reflects the performance
and specifications of the Rochester manufactured version of this device. Rochester Electronics
guarantees the performance of its semiconductor products to the original OEM specifications.
‘Typical’ values are for reference purposes only. Certain minimum or maximum ratings may be
based on product characterization, design, simulation, or sample testing.
© 2013 Rochester Electronics, LLC. All Rights Reserved 07112013
To learn more, please visit www.rocelec.com
Revised March 2000
DM74LS533
Octal Transparent Latch with 3-STATE Outputs
General Description
Features
The DM74LS533 consists of eight latches with 3-STATE
outputs for bus organized system applications. The flipflops appear transparent to the data when Latch Enable
(LE) is HIGH. When LE is LOW, the data that meets the
setup times is latched. Data appears on the bus when the
Output Enable (OE) is LOW. When OE is HIGH the bus
output is in the high impedance state. The DM74LS533 is
the same as the DM74LS373, except that the outputs are
inverted. For detailed specifications please see the
DM74LS373 data sheet, but note that the propagation
delays from data to output are 5.0 ns longer for the
DM74LS533 than for the DM74LS373.
■ Eight latches in a single package
■ 3-STATE outputs for bus interfacing
Ordering Code:
Order Number
Package Number
Package Description
DM74LS533WM
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
DM74LS533N
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Logic Symbol
VCC = Pin 20
GND = Pin 10
Pin Descriptions
Pin Names
Function Table
Description
OUTPUT
Latch
Enable
Enable
Latch Enable Input (Active HIGH)
L
H
H
L
OE
Output Enable Input (Active LOW)
L
H
L
H
O0–O7
Complementary 3-STATE Outputs
D0, D7
Data Inputs
LE
D
Output
O
L
L
X
QO
H
X
X
Z
L = LOW State
H = HIGH State
X = Don't Care
Z = High Impedance State
QO = Previous Condition of O
© 2000 Fairchild Semiconductor Corporation
DS009811
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DM74LS533 Octal Transparent Latch with 3-STATE Outputs
October 1988
DM74LS533
Absolute Maximum Ratings(Note 1)
Supply Voltage
Note 1: The “Absolute Maximum Ratings are those values beyond which
the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the absolute maximum ratings.
The “Recommended Operating Conditions” table will define the conditions
for actual device operation.
7V
Input Voltage
7V
0°C to +70°C
Operating Free Air Temperature Range
−65°C to +150°C
Storage Temperature Range
Recommended Operating Conditions
Symbol
Parameter
Min
Nom
Max
Units
4.75
5
5.25
V
VCC
Supply Voltage
VIH
High Level Input Voltage
VIL
Low Level Input Voltage
0.8
V
IOH
High Level Output Current
−2.6
mA
IOL
Low Level Output Current
24
mA
TA
Free Air Operating Temperature
70
°C
2
V
0
Electrical Characteristics
Over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
VI
Input Clamp Voltage
VCC = Min, II = −18 mA
VOH
HIGH Level
VCC = Min, IOH = Max,
Output Voltage
VIL = Max
VOL
LOW Level
VCC = Min, IOL = Max,
Output Voltage
VIH = Min
Min
2.4
Typ
(Note 2)
Max
Units
−1.5
V
3.4
V
0.35
0.5
IOL = 12 mA, VCC = Min
0.4
V
II
Input Current @ Max Input Voltage
VCC = Max, VI = 7V
0.1
IIH
HIGH Level Input Current
VCC = Max, VI = 2.7V
20
µA
IIL
LOW Level Input Current
VCC = Max, VI = 0.4V
−0.4
mA
−100
mA
46
mA
−20.0
µA
20.0
µA
Short Circuit
VCC = Max
Output Current
(Note 3)
ICCZ
Supply Current
VCC = Max
IOZL
3-STATE Output Off
VCC = VCCH
Current LOW
VOZL = 0.4V
IOS
IOZH
3-STATE Output Off
VCC = VCCH
Current HIGH
VOZH = 2.7V
−20
mA
Note 2: All typicals are at VCC = 5V, TA = 25°C.
Note 3: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Switching Characteristics
VCC = +5.0V, TA = +25°C
CL = 50 pF
Symbol
RL = 2 kΩ
Parameter
Min
Units
Max
tPLH
Propagation Delay
23
tPHL
Data to Qx
23
tPLH
Propagation Delay
30
tPHL
LE to Qx
25
tPZL
Output Enable Time
22
tPZH
OE to Qx
20
tPHZ
Output Enable Time
20
tPLZ
OE to Qx
25
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2
ns
ns
ns
ns
DM74LS533
Physical Dimensions inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
Package Number M20B
3
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DM74LS533 Octal Transparent Latch with 3-STATE Outputs
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Package Number N20A
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and
Fairchild reserves the right at any time without notice to change said circuitry and specifications.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
2. A critical component in any component of a life support
device or system whose failure to perform can be reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the
user.
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