Support Mixed-Mode Signal Operation on
All Ports (5-V Input/Output Voltage With
3.3-V V
D
ESD Protection Exceeds 2000 V Per
CC
)
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
D
Latch-Up Performance Exceeds 250 mA Per
SN54LVC373A...J OR W PACKAGE
SN74LVC373A. . . DB, DW, OR PW PACKAGE
SN54LVC373A. . . FK PACKAGE
OE
1Q
1D
2D
2Q
3Q
3D
4D
4Q
GND
(TOP VIEW)
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
(TOP VIEW)
V
8Q
8D
7D
7Q
6Q
6D
5D
5Q
LE
CC
JESD 17
CC
D
Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages, Ceramic Chip Carriers (FK),
Ceramic Flat (W) Packages, and DIPs (J)
description
2D
2Q
3Q
3D
4D
1D1QOE
3 2 1 20 19
4
5
6
7
8
9 10 11 12 13
8Q
V
8D
18
7D
17
7Q
16
6Q
15
14
6D
The SN54L VC373A octal transparent D-type latch
is designed for 2.7-V to 3.6-V V
the SN74L VC373A octal transparent D-type latch
is designed for 1.65-V to 3.6-V V
operation and
CC
operation.
CC
4Q
GND
LE
5Q
5D
While the latch-enable (LE) input is high, the Q outputs follow the data (D) inputs. When LE is taken low, the
Q outputs are latched at the logic levels set up at the D inputs.
A buffered output-enable (OE
) input can be used to place 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 in the high-impedance state.
Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators
in a mixed 3.3-V/5-V system environment.
T o ensure the high-impedance state during power up or power down, OE
should be tied to VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
The SN54L VC373A is characterized for operation over the full military temperature range of –55°C to 125°C.
The SN74LVC373A is characterized for operation from –40°C to 85°C.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
EPIC is a trademark of Texas Instruments Incorporated.
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.
Copyright 1998, Texas Instruments Incorporated
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
1
SN54LVC373A, SN74LVC373A
OCTAL TRANSPARENT D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCAS295J – JANUARY 1993 – REVISED JUNE 1998
FUNCTION TABLE
INPUTS
OELED
LHHH
LHL L
LLX Q
HXX Z
(each latch)
OUTPUT
Q
0
logic symbol
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
†
OE
LE
1D
2D
3D
4D
5D
6D
7D
8D
1
11
3
4
7
8
13
14
17
18
EN
C1
1D
logic diagram (positive logic)
1
OE
11
LE
12
15
16
19
2
1Q
5
2Q
6
3Q
9
4Q
5Q
6Q
7Q
8Q
3
1D
To Seven Other Channels
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
C1
1D
2
1Q
UNIT
VCCSuppl
oltage
V
VOOutput voltage
V
IOHHigh-level output current
mA
IOLLow-level output current
mA
SN54LVC373A, SN74LVC373A
OCTAL TRANSPARENT D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCAS295J – JANUARY 1993 – REVISED JUNE 1998
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
Input voltage range, V
Voltage range applied to any output in the high-impedance or power-off state, V
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.
NOTES: 1. The input negative-voltage and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The value of VCC is provided in the recommended operating conditions table.
3. The package thermal impedance is calculated in accordance with JESD 51.
∆t/∆vInput transition rise or fall rate010010ns/V
T
NOTE 4: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
High-level input voltage
IH
Low-level input voltage
IL
Input voltage05.505.5V
I
p
p
p
Operating free-air temperature–55125–4085°C
A
Implications of Slow or Floating CMOS Inputs
Operating23.61.653.6
Data retention only1.51.5
VCC = 1.65 V to 1.95 V0.65 × V
VCC = 2.3 V to 2.7 V
VCC = 2.7 V to 3.6 V22
VCC = 1.65 V to 1.95 V0.35 × V
VCC = 2.3 V to 2.7 V
VCC = 2.7 V to 3.6 V0.80.8
OCTAL TRANSPARENT D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCAS295J – JANUARY 1993 – REVISED JUNE 1998
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN54LVC373ASN74LVC373A
MINTYP†MAXMINTYP†MAX
1010
1010
V
µ
= –
OH
IOH = –4 mA1.65 V1.2
V
OH
OL
I
I
I
off
I
OZ
CC
∆I
CC
C
i
C
†
‡
o
All typical values are at VCC = 3.3 V, TA = 25°C.
This applies in the disabled state only.
IOH = –8 mA2.3 V1.7
= –12
OH
IOH = –24 mA3 V2.22.2
=
OL
IOL = 4 mA1.65 V0.45
IOL = 8 mA2.3 V0.7
IOL = 12 mA2.7 V0.40.4
IOL = 24 mA3 V0.550.55
VI = 0 to 5.5 V3.6 V±5±5µA
VI or VO = 5.5 V0±10µA
VO = 0 to 5.5 V3.6 V±15±10µA
VI = VCC or GND
3.6 V ≤ VI ≤ 5.5 V
One input at VCC – 0.6 V,
Other inputs at VCC or GND
VI = VCC or GND3.3 V4124pF
VO = VCC or GND3.3 V5.5125.5pF
‡
CC
1.65 V to 3.6 VVCC–0.2
2.7 V to 3.6 V VCC–0.2
2.7 V2.22.2
3 V2.42.4
1.65 V to 3.6 V0.2
2.7 V to 3.6 V0.2
=
O
2.7 V to 3.6 V500500µA
timing requirements over recommended operating free-air temperature range (unless otherwise
noted) (see Figure 3)
SN54LVC373A
VCC = 2.7 V
MINMAXMINMAX
t
w
t
su
t
h
Pulse duration, LE high3.33.3ns
Setup time, data before LE↓22ns
Hold time, data after LE↓22ns
VCC = 3.3 V
± 0.3 V
UNIT
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
t
Q
ns
t
Q
ns
CONDITIONS
C
d
f
pF
SN54LVC373A, SN74LVC373A
OCTAL TRANSPARENT D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCAS295J – JANUARY 1993 – REVISED JUNE 1998
timing requirements over recommended operating free-air temperature range (unless otherwise
noted) (see Figures 1 through 3)
SN74LVC373A
VCC = 1.8 V
± 0.15 V
MINMAXMINMAXMINMAXMINMAX
t
w
t
su
t
h
†
This information was not available at the time of publication.
Pulse duration, LE high††3.33.3ns
Setup time, data before LE↓††22ns
Hold time, data after LE↓††1.51.5ns
switching characteristics over recommended operating free-air temperature range (unless
otherwise noted) (see Figure 3)
PARAMETER
pd
t
en
t
dis
FROM
(INPUT)
D
LE
OE
OE
(OUTPUT)
VCC = 2.5 V
± 0.2 V
TO
Q8.717.7ns
Q80.57ns
VCC = 2.7 V
SN54LVC373A
VCC = 2.7 V
MINMAXMINMAX
VCC = 3.3 V
± 0.3 V
VCC = 3.3 V
± 0.3 V
8.517.5
9.518.5
UNIT
UNIT
switching characteristics over recommended operating free-air temperature range (unless
otherwise noted) (see Figures 1 through 3)
SN74LVC373A
PARAMETER
pd
t
en
t
dis
‡
t
sk(o)
†
This information was not available at the time of publication.
‡
Skew between any two outputs of the same package switching in the same direction
operating characteristics, T
Power dissipation capacitance
p
per latch
†
This information was not available at the time of publication.
FROM
(INPUT)
D
LE
OE
OE
PARAMETER
A
TO
(OUTPUT)
Q††††8.71.57.7ns
Q††††7.61.57ns
= 25°C
Outputs enabled
Outputs disabled
VCC = 1.8 V
± 0.15 V
MINMAXMINMAXMINMAXMINMAX
††††7.81.56.8
††††8.227.6
TEST
= 10 MHz
VCC = 2.5 V
± 0.2 V
VCC = 1.8 V
± 0.15 V
TYPTYPTYP
††46
††3
VCC = 2.7 V
VCC = 2.5 V
± 0.2 V
VCC = 3.3 V
± 0.3 V
VCC = 3.3 V
± 0.3 V
UNIT
1ns
UNIT
p
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
5
SN54LVC373A, SN74LVC373A
OCTAL TRANSPARENT D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCAS295J – JANUARY 1993 – REVISED JUNE 1998
PARAMETER MEASUREMENT INFORMATION
= 1.8 V ± 0.15 V
V
CC
2 × V
From Output
Under Test
CL = 30 pF
(see Note A)
1k Ω
1k Ω
S1
Open
GND
CC
TESTS1
t
pd
t
PLZ/tPZL
t
PHZ/tPZH
Open
2 × V
Open
CC
LOAD CIRCUIT
Timing
Input
t
Data
Input
Input
t
PLH
Output
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. All input pulses are supplied by generators having the following characteristics: PRR≤10 MHz, ZO = 50 Ω, tr≤2 ns, tf≤2 ns.
D. The outputs are measured one at a time with one transition per measurement.
E. t
PLZ
F. t
PZL
G. t
PLH
VCC/2
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
VCC/2VCC/2
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
and t
PHZ
and t
PZH
and t
PHL
VCC/2
t
su
are the same as t
are the same as ten.
are the same as tpd.
h
VCC/2
VCC/2VCC/2
.
dis
t
PHL
V
0 V
V
0 V
V
0 V
V
V
CC
CC
CC
OH
OL
Input
Output
Control
(low-level
enabling)
Output
Waveform 1
S1 at 2 × V
(see Note B)
Output
Waveform 2
S1 at Open
(see Note B)
VOLTAGE WAVEFORMS
PULSE DURATION
t
PZL
CC
t
PZH
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
VCC/2
VCC/2
t
w
V
0 V
V
0 V
V
V
V
0 V
CC
CC
CC
OL
OH
VCC/2VCC/2
VCC/2VCC/2
t
PLZ
VOL + 0.15 V
t
PHZ
VOH – 0.15 V
Figure 1. Load Circuit and Voltage Waveforms
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
From Output
Under Test
CL = 30 pF
(see Note A)
SN54LVC373A, SN74LVC373A
OCTAL TRANSPARENT D-TYPE LATCHES
SCAS295J – JANUARY 1993 – REVISED JUNE 1998
PARAMETER MEASUREMENT INFORMATION
V
= 2.5 V ± 0.2 V
CC
2 × V
500 Ω
500 Ω
S1
Open
GND
CC
TESTS1
t
pd
t
PLZ/tPZL
t
PHZ/tPZH
WITH 3-STATE OUTPUTS
Open
2 × V
CC
GND
LOAD CIRCUIT
Timing
Input
t
Data
Input
Input
t
PLH
Output
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. All input pulses are supplied by generators having the following characteristics: PRR≤10 MHz, ZO = 50 Ω, tr≤2 ns, tf≤2 ns.
D. The outputs are measured one at a time with one transition per measurement.
E. t
PLZ
F. t
PZL
G. t
PLH
VCC/2
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
VCC/2VCC/2
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
and t
PHZ
and t
PZH
and t
PHL
VCC/2
t
su
are the same as t
are the same as ten.
are the same as tpd.
h
VCC/2
VCC/2VCC/2
.
dis
t
PHL
V
0 V
V
0 V
V
0 V
V
V
CC
CC
CC
OH
OL
Input
Output
Control
(low-level
enabling)
Output
Waveform 1
S1 at 2 × V
(see Note B)
Output
Waveform 2
S1 at GND
(see Note B)
VOLTAGE WAVEFORMS
PULSE DURATION
t
PZL
CC
t
PZH
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
VCC/2
VCC/2
t
w
V
0 V
V
0 V
V
V
V
0 V
CC
CC
CC
OL
OH
VCC/2VCC/2
VCC/2VCC/2
t
PLZ
VOL + 0.15 V
t
PHZ
VOH – 0.15 V
Figure 2. Load Circuit and Voltage Waveforms
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
7
SN54LVC373A, SN74LVC373A
OCTAL TRANSPARENT D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCAS295J – JANUARY 1993 – REVISED JUNE 1998
PARAMETER MEASUREMENT INFORMATION
= 2.7 V AND 3.3 V ± 0.3 V
V
CC
From Output
Under Test
CL = 50 pF
(see Note A)
Timing
Input
Data
Input
Input
t
PLH
Output
500 Ω
500 Ω
LOAD CIRCUIT
1.5 V
t
su
1.5 V1.5 V
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
1.5 V1.5 V
1.5 V1.5 V
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
t
h
S1
t
PHL
6 V
GND
2.7 V
0 V
2.7 V
0 V
2.7 V
0 V
V
V
Open
OH
OL
Input
Output
Control
(low-level
enabling)
Output
Waveform 1
S1 at 6 V
(see Note B)
Output
Waveform 2
S1 at GND
(see Note B)
TESTS1
t
pd
t
PLZ/tPZL
t
PHZ/tPZH
1.5 V1.5 V
VOLTAGE WAVEFORMS
PULSE DURATION
t
PZL
t
PZH
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
t
w
t
1.5 V
t
1.5 V
Open
6 V
GND
1.5 V1.5 V
PLZ
PHZ
VOL + 0.3 V
VOH – 0.3 V
2.7 V
0 V
2.7 V
0 V
3 V
V
OL
V
OH
0 V
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. All input pulses are supplied by generators having the following characteristics: PRR≤10 MHz, ZO = 50 Ω, tr≤2.5 ns, tf≤2.5 ns.
D. The outputs are measured one at a time with one transition per measurement.
E. t
F. t
G. t
PLZ
PZL
PLH
and t
and t
and t
are the same as t
PHZ
are the same as ten.
PZH
are the same as tpd.
PHL
dis
Figure 3. Load Circuit and Voltage Waveforms
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
.
IMPORTANT NOTICE
T exas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue
any product or service without notice, and advise customers to obtain the latest version of relevant information
to verify, before placing orders, that information being relied on is current and complete. All products are sold
subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those
pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty . Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
CERT AIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF
DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR
WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER
CRITICAL APPLICA TIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERST OOD TO
BE FULLY AT THE CUSTOMER’S RISK.
In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards must be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent
that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other
intellectual property right of TI covering or relating to any combination, machine, or process in which such
semiconductor products or services might be or are used. TI’s publication of information regarding any third
party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.
Copyright 1998, Texas Instruments Incorporated
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