3.3-V ABT 16-BIT BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS691D – MAY 1997 – REVISED APRIL 1999
D
Members of the Texas Instruments
Widebus
D
State-of-the-Art Advanced BiCMOS
Family
Technology (ABT) Design for 3.3-V
Operation and Low Static-Power
Dissipation
D
Support Mixed-Mode Signal Operation
(5-V Input and Output Voltages With
3.3-V V
D
Support Unregulated Battery Operation
CC
)
Down to 2.7 V
D
Typical V
< 0.8 V at V
D
I
off
and Power-Up 3-State Support Hot
(Output Ground Bounce)
OLP
= 3.3 V, TA = 25°C
CC
Insertion
D
Bus Hold on Data Inputs Eliminates the
Need for External Pullup/Pulldown
Resistors
D
Distributed VCC and GND Pin Configuration
Minimizes High-Speed Switching Noise
D
Flow-Through Architecture Optimizes PCB
Layout
D
Latch-Up Performance Exceeds 500 mA Per
JESD 17
D
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
D
Package Options Include Plastic Shrink
Small-Outline (DL) and Thin Shrink
Small-Outline (DGG) Packages and 380-mil
Fine-Pitch Ceramic Flat (WD) Package
Using 25-mil Center-to-Center Spacings
SN54LVTH16541. . . WD PACKAGE
SN74LVTH16541. . . DGG OR DL PACKAGE
1OE1
1Y1
1Y2
GND
1Y3
1Y4
V
CC
1Y5
1Y6
GND
1Y7
1Y8
2Y1
2Y2
GND
2Y3
2Y4
V
CC
2Y5
2Y6
GND
2Y7
2Y8
2OE1
(TOP VIEW)
1
48
2
47
3
46
4
45
5
44
6
43
7
42
8
41
9
40
10
39
11
38
12
37
13
36
14
35
15
34
16
33
17
32
18
31
19
30
20
29
21
28
22
27
23
26
24
25
1OE2
1A1
1A2
GND
1A3
1A4
V
CC
1A5
1A6
GND
1A7
1A8
2A1
2A2
GND
2A3
2A4
V
CC
2A5
2A6
GND
2A7
2A8
2OE2
description
These 16-bit buffers/drivers are designed specifically for low-voltage (3.3-V) VCC operation, but with the
capability to provide a TTL interface to a 5-V system environment.
These devices are noninverting 16-bit buffers composed of two 8-bit sections with separate output-enable
signals. For either 8-bit buffer section, the two output-enable (1OE1
be low for the corresponding Y outputs to be active. If either output-enable input is high, the outputs of that 8-bit
buffer section are in the high-impedance state.
When V
is between 0 and 1.5 V , the devices are in the high-impedance state during power up or power down.
CC
However, to ensure the high-impedance state above 1.5 V, OE
the minimum value of the resistor is determined by the current-sinking capability of the driver.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
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.
Widebus is a trademark of Texas Instruments Incorporated.
UNLESS OTHERWISE NOTED this document contains PRODUCTION
DATA information 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
and 1OE2 or 2OE1 and 2OE2) inputs must
should be tied to VCC through a pullup resistor;
Copyright 1999, Texas Instruments Incorporated
1
SN54LVTH16541, SN74LVTH16541
3.3-V ABT 16-BIT BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS691D – MAY 1997 – REVISED APRIL 1999
description (continued)
These devices are fully specified for hot-insertion applications using I
and power-up 3-state. The I
off
disables the outputs, preventing damaging current backflow through the devices when they are powered down.
The power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down,
which prevents driver conflict.
The SN54L VTH16541 is characterized for operation over the full military temperature range of –55°C to 125°C.
The SN74LVTH16541 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
(each 8-bit section)
logic symbol
INPUTS
OE2A
OE1
LLLL
LLH H
HXX Z
XHX Z
†
1OE1
1OE2
2OE1
2OE2
1
48
24
25
&
&
OUTPUT
Y
EN1
EN2
circuitry
off
47
1A1
46
1A2
44
1A3
43
1A4
41
1A5
40
1A6
38
1A7
37
1A8
36
2A1
35
2A2
33
2A3
32
2A4
30
2A5
29
2A6
27
2A7
26
2A8
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
111
2
11
12
13
14
16
17
19
20
22
23
2
1Y1
3
1Y2
5
1Y3
6
1Y4
8
1Y5
9
1Y6
1Y7
1Y8
2Y1
2Y2
2Y3
2Y4
2Y5
2Y6
2Y7
2Y8
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
UNIT
logic diagram (positive logic)
SN54LVTH16541, SN74LVTH16541
3.3-V ABT 16-BIT BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS691D – MAY 1997 – REVISED APRIL 1999
1
1OE1
48
1OE2
47
1A11Y1
To Seven Other ChannelsTo Seven Other Channels
2
2OE1
2OE2
2A1
24
25
36
13
2Y1
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
Voltage range applied to any output in the high state, V
Current into any output in the low state, I
Current into any output in the high state, I
Input clamp current, I
Output clamp current, I
Package thermal impedance, θ
Storage temperature range, T
†
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 and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
2. This current flows only when the output is in the high state and VO > VCC.
3. The package thermal impedance is calculated in accordance with JESD 51.
∆t/∆vInput transition rise or fall rateOutputs enabled1010ns/V
∆t/∆V
T
A
NOTE 4: All unused control inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
A
Y
ns
OE
Y
ns
OE
Y
ns
SN54LVTH16541, SN74LVTH16541
3.3-V ABT 16-BIT BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS691D – MAY 1997 – REVISED APRIL 1999
switching characteristics over recommended operating free-air temperature range, CL = 50 pF
(unless otherwise noted) (see Figure 1)
SN54LVTH16541SN74LVTH16541
PARAMETER
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
sk(o)
†
All typical values are at VCC = 3.3 V, TA = 25°C.
FROM
(INPUT)
TO
(OUTPUT)
VCC = 3.3 V
± 0.3 V
MINMAXMINMAXMIN TYP†MAXMINMAX
13.7412.43.53.8
13.74123.53.8
1.14.85.71.22.74.65.5
1.14.85.41.22.84.65.2
2.16.26.52.24.15.96.2
1.95.762.23.85.45.5
VCC = 2.7 V
VCC = 3.3 V
± 0.3 V
VCC = 2.7 V
0.50.5ns
UNIT
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
5
SN54LVTH16541, SN74LVTH16541
3.3-V ABT 16-BIT BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS691D – MAY 1997 – REVISED APRIL 1999
PARAMETER MEASUREMENT INFORMATION
From Output
Under Test
CL = 50 pF
(see Note A)
500 Ω
500 Ω
S1
6 V
GND
Open
TESTS1
t
pd
t
PLZ/tPZL
t
PHZ/tPZH
Open
6 V
GND
LOAD CIRCUIT
t
w
Input
Input
Output
Output
INVERTING AND NONINVERTING OUTPUTS
1.5 V
VOLTAGE WAVEFORMS
PULSE DURATION
1.5 V1.5 V
t
PLH
1.5 V1.5 V
t
PHL
1.5 V1.5 V
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
1.5 V
t
PHL
t
PLH
2.7 V
0 V
V
OH
V
OL
V
OH
V
OL
2.7 V
0 V
Timing Input
Data Input
Output
Control
Output
Waveform 1
S1 at 6 V
(see Note B)
Output
Waveform 2
S1 at GND
(see Note B)
1.5 V
t
su
1.5 V1.5 V
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
1.5 V1.5 V
t
PZL
1.5 V
t
PZH
1.5 V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
LOW- AND HIGH-LEVEL ENABLING
t
h
VOL + 0.3 V
VOH – 0.3 V
t
PLZ
t
PHZ
2.7 V
0 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.
Figure 1. Load Circuit and Voltage Waveforms
6
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 1999, Texas Instruments Incorporated
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