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is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
© 2000 Fairchild Semiconductor Corporation DS006226 www .fairchildsemi.com
April 1984
Revised February 2000
DM74ALS573B Extended Temperature Octal D-Type Transparent Latch with 3-STATE Outputs
DM74ALS573B
Extended Temperature Octal D-Type Transparent Latch
with 3-STATE Outputs
General Descript ion
These 8-bit registers feature totem-pole 3-STATE outputs
designed specifically for driving highly-capacitive or rela-
tively low- impedance loa ds. Th e high -i m ped anc e s tate and
increased high-logic-level drive provide these registers with
the capability of being connecte d directly to and driving the
bus line s in a bus-or ga ni zed sy stem wi th ou t n eed fo r inte r-
face or pull-up components. They are particul arly attractive
for implementing buffer registers, I/O ports, bidirectional
bus drivers, and working registers.
The eigh t latch es o f the DM 74 AL S573 B are tran spa ren t D-
type latches. While the enable (G) is HIGH the Q outputs
will follow the data (D) inputs. When the enable is taken
LOW the output will be latch ed at the level of the data that
was set UP.
A buffered output control input can be used to place the
eight o utputs in either a normal log ic state (HIGH or LOW
logic levels) or a high-impedance state. In the high-imped-
ance state th e outputs neit her load nor dr iv e the bus lines
significantly.
The output co ntrol does not affect th e internal operation of
the latches. That is, the old data can be retained or new
data can be entered even while the outputs are OFF.
Features
■Switching specifications at 50 pF
■Switching specifications guaranteed over full tempera-
ture and VCC range
■Advanced oxide-isolated, ion-implanted Schottky TTL
process
■Functionally equivalent with DM74LS373
■Improv ed AC pe rfo rma nce over DM7 4LS37 3 at approxi-
mately half the power
■3-STATE buffer-type outputs drive bus lines directly
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering cod e.
Connection Diagram
Order Number Package Number Package Description
DM74ALS573BWM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
DM74ALS573BSJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
DM74ALS573BN N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
www.fairchildsemi.com 2
DM74ALS573B
Function Table
L = LOW Sta t e
H = HIGH State
X = Don’t Care
Z = High Impedance State
Q0 = Previo us C ondition of Q
Logic Diagram
Output Enable D Output
Control G Q
LHHH
LHLL
LLXQ
0
HXXZ
3 www.fairchildsemi.com
DM74ALS573B
Absolute Maximum Ratings(Note 1)
Note 1: The “A bsol ute M axim um Ratin gs” are those valu es b eyo nd 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 “Re comm ended Operat ing Co ndition s” table will de fine the cond itions
for actu al device operation.
Recommended Operating Conditions
Note 2: Th e (↓) arrow indicates the ne gative edge o f the enable is us ed for referenc e.
Electri cal Characteristics
over recommended operating free air temperature range. All typical values are measured at VCC = 5V, TA = 25°C.
Supply Voltage 7V
Input Voltage 7V
Voltage Applied to Disabled Output 5.5V
Operating Free Air Temperature Range 0°C to +70°C
Storage Temperature Range −65°C to +150°C
Typical θJA
N Package 56.0°C/W
M Package 75.0°C/W
Symbol Parameter Min Nom Max Units
VCC Supply Voltage 4.5 5 5.5 V
VIH HIGH Level Input Voltage 2 V
VIL LOW Level Input Voltage 0.8 V
IOH HIGH Level Output Current −2.6 mA
IOL LOW Level Output Current 24 mA
tWWidth of Enable Pulse , HIGH 10 ns
tSU Data Setup Time (Note 2) 10↓ns
tHData Hold Time (Note 2) 7↓ns
TAFree Air Operating Temperature 0 70 °C
Symbol Parameter Conditions Min Typ Max Units
VIK Input Clamp Voltage VCC = 4.5V, II = −18 mA −1.2 V
VOH HIGH Level VCC = 4.5V IOH = Max 2.4 3.2 V
Output Voltage VIL = VIL Max
VCC = 4.5V to 5.5V IOH = −400 µAV
CC − 2V
VOL LOW Level VCC = 4.5V IOL = 12 mA 0.25 0.4 V
Output Voltage VIH = 2V IOL = 24 mA 0.35 0.5 V
IIInput Current @ Maximum VCC = 5.5V, VIH = 7V 0.1 mA
Input V oltag e
IIH HIGH Level Input Current VCC = 5.5V, VIH = 2.7V 20 µA
IIL LOW Level Input Current VCC = 5.5V, VIL = 0.4V −0.1 mA
IOOutput Drive Current VCC = 5.5V, VO = 2.25V −30 −112 mA
IOZH OFF-State Output Current VCC = 5.5V, VIH = 2V 20 µA
HIGH Level Voltage Applied VO = 2.7V
IOZL OFF-State Output Current VCC = 5.5V, VIH = 2V −20 µA
LOW Level Voltage Applied VO = 0.4V
ICC Supply Current VCC = 5.5V Outputs HIGH 10 17 mA
Outputs OPEN Outputs LOW 15 24 mA
Outputs Disabled 15.5 27 mA
www.fairchildsemi.com 4
DM74ALS573B
Switching Characteri stics
over recommended operating free air temperature range.
Symbol Parameter Conditions From To Min Max Units
tPLH Propagation Delay Time VCC = 4.5V to 5.5V Data Any Q 2 14 ns
LOW-to-HIGH Level Output RL = 500Ω
tPHL Propagation Delay Time CL = 50 pF Data Any Q 2 14 ns
HIGH-to-LOW Level Output
tPLH Propagation Delay Time Enable Any Q 6 20 ns
LOW-to-HIGH Level Output
tPHL Propagation Delay Time Enable Any Q 6 19 ns
HIGH-to-LOW Level Output
tPZH Output Enable Time Output Any Q 3 18 ns
to HIGH Level Output Control
tPZL Output Enable Time Output Any Q 4 18 ns
to LOW Level Output Control
tPHZ Output Disable Time Output Any Q 1 10 ns
from HIGH Level Output Control
tPLZ Output Disable Time Output Any Q 1 15 ns
from LOW Level Output Control
5 www.fairchildsemi.com
DM74ALS573B
Physical Dim ensions inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
Package Number M20B
www.fairchildsemi.com 6
DM74ALS573B
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Sma ll Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Package Number M20D
7 www.fairchildsemi.com
DM74ALS573B Extended Temperature Octal D-Type Transparent Latch with 3-STATE Outputs
Physical Dim ensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Packag e Num be r N20A
Fairchild does not assume any responsibility for use of any circu it ry described, no circuit patent license s 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:
1. Life suppor t de vices o r syst ems 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
instruct ions fo r use pr ovi de d in the labe l ing, can be re a-
sonably expected to result in a significant injury to the
user.
2. A criti cal com ponen t in any compo nent o f a l ife supp ort
device or system whose failure to perform can be rea-
sonabl y e xpec ted to c ause th e fa i lure of the li fe s upp or t
device or system, or to affect its safety or effectiveness.
www.fairchildsemi.com
www.onsemi.com
1
ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries.
ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent
coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein.
ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards,
regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or
specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer
application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not
designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification
in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized
application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and
expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such
claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This
literature is subject to all applicable copyright laws and is not for resale in any manner.
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