OCTAL BUS TRANSCEIVER WITH ADJUSTABLE OUTPUT VOLTAGE
AND 3-STATE OUTPUTS
SCAS585F – NOVEMBER 1996 – REVISED AUGUST 1998
D
EPIC
(Enhanced-Performance Implanted
CMOS) Submicron Process
D
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
D
Latch-Up Performance Exceeds 250 mA Per
JESD 17
D
Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages
description
This 8-bit (octal) noninverting bus transceiver
contains two separate supply rails. The B port is
designed to track V
,which accepts voltages
CCB
DB, DW, OR PW PACKAGE
(TOP VIEW)
V
GND
GND
NC – No internal connection
CCA
DIR
A1
A2
A3
A4
A5
A6
A7
A8
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
V
CCB
NC
OE
B1
B2
B3
B4
B5
B6
B7
B8
GND
from 3 V to 5.5 V, and the A port is designed to
track V
, which operates at 2.3 V to 3.6 V . This
CCA
allows for translation from a 3.3-V to a 5-V system
environment and vice versa, or from a 2.5-V to a
3.3-V system environment and vice versa.
The SN74LVCC3245A is designed for asynchronous communication between data buses. The device
transmits data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the
direction-control (DIR) input. The output-enable (OE
) input can be used to disable the device so the buses are
effectively isolated.
The SN74LVCC3245A is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
INPUTS
OEDIR
LLB data to A bus
LHA data to B bus
HXIsolation
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.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Copyright 1998, Texas Instruments Incorporated
1
SN74LVCC3245A
OCTAL BUS TRANSCEIVER WITH ADJUSTABLE OUTPUT VOLTAGE
AND 3-STATE OUTPUTS
SCAS585F – NOVEMBER 1996 – REVISED AUGUST 1998
logic diagram (positive logic)
2
DIR
22
OE
3
A1
21
B1
To Seven Other Channels
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
Input voltage range, V
and V
CCA
: All A port (see Note 2) –0.5 V to V
I
All B port (see Note 1) –0.5 V to V
Except I/O ports (see Note 2) –0.5 V to V
Output voltage range, V
Input clamp current, I
Output clamp current, I
Continuous output current, I
Continuous current through V
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. This value is limited to 6 V maximum.
2. This value is limited to 4.6 V maximum.
3. The package thermal impedance is calculated in accordance with JESD 51.
SN74LVCC3245A
OCTAL BUS TRANSCEIVER WITH ADJUSTABLE OUTPUT VOLTAGE
AND 3-STATE OUTPUTS
SCAS585F – NOVEMBER 1996 – REVISED AUGUST 1998
PARAMETER MEASUREMENT INFORMATION FOR A PORT
V
From Output
Under Test
CL = 30 pF
(see Note A)
= 2.5 V ± 0.2 V AND V
CCA
500 Ω
500 Ω
S1
2 × V
Open
GND
CC
= 3.3 V ± 0.3 V
CCB
TESTS1
t
pd
t
PLZ/tPZL
t
PHZ/tPZH
Open
2 × V
GND
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 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 1. Load Circuit and Voltage Waveforms
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
From Output
Under Test
CL = 50 pF
(see Note A)
OCTAL BUS TRANSCEIVER WITH ADJUSTABLE OUTPUT VOLTAGE
AND 3-STATE OUTPUTS
SCAS585F – NOVEMBER 1996 – REVISED AUGUST 1998
PARAMETER MEASUREMENT INFORMATION FOR B PORT
V
= 2.5 V ± 0.2 V AND V
CCA
500 Ω
500 Ω
S1
2 × V
Open
GND
CC
= 3.3 V ± 0.3 V
CCB
TESTS1
t
pd
t
PLZ/tPZL
t
PHZ/tPZH
SN74LVCC3245A
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
SN74LVCC3245A
OCTAL BUS TRANSCEIVER WITH ADJUSTABLE OUTPUT VOLTAGE
AND 3-STATE OUTPUTS
SCAS585F – NOVEMBER 1996 – REVISED AUGUST 1998
PARAMETER MEASUREMENT INFORMATION FOR B PORT
V
From Output
Under Test
CL = 50 pF
(see Note A)
B-Port
Input
Input
B-Port
Output
500 Ω
500 Ω
LOAD CIRCUIT
t
w
50% V
CC
VOLTAGE WAVEFORMS
PULSE DURATION
50% V
1.5 V
CC
1.5 V
t
PLH
50% V
CC
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
NONINVERTING OUTPUTS
= 3.6 V AND V
CCA
2 × V
S1
GND
50% V
CC
V
0 V
t
PHL
V
V
Open
V
0 V
CC
OH
OL
CC
CC
Waveform 1
S1 at 2 × V
(see Note B)
Waveform 2
(see Note B)
= 5.5 V
CCB
Output
Control
Output
CC
Output
S1 at Open
TESTS1
t
PLH/tPHL
t
PLZ/tPZL
t
PHZ/tPZH
1.5 V
t
PZL
50% V
CC
t
PZH
50% V
CC
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
LOW- AND HIGH-LEVEL ENABLING
t
t
PHZ
PLZ
Open
2 × V
Open
CC
1.5 V
VOL + 0.3 V
VOH – 0.3 V
2.7 V
0 V
V
CC
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 3. Load Circuit and Voltage Waveforms
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
OCTAL BUS TRANSCEIVER WITH ADJUSTABLE OUTPUT VOLTAGE
PARAMETER MEASUREMENT INFORMATION FOR A AND B PORT
From Output
Under Test
CL = 50 pF
(see Note A)
LOAD CIRCUIT
Input
VOLTAGE WAVEFORMS
PULSE DURATION
Input
t
PLH
Output
PROPAGATION DELAY TIMES
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.
1.5 V
VOLTAGE WAVEFORMS
NONINVERTING OUTPUTS
500 Ω
500 Ω
t
w
1.5 V
1.5 V1.5 V
SN74LVCC3245A
AND 3-STATE OUTPUTS
SCAS585F – NOVEMBER 1996 – REVISED AUGUST 1998
V
AND V
CCA
7 V
S1
1.5 V1.5 V
t
PHL
GND
2.7 V
0 V
V
OH
V
OL
Open
2.7 V
0 V
= 3.6 V
CCB
Output
Control
Output
Waveform 1
S1 at 7 V
(see Note B)
Output
Waveform 2
S1 at Open
(see Note B)
TESTS1
t
PLH/tPHL
t
PLZ/tPZL
t
PHZ/tPZH
1.5 V
t
PZL
t
PZH
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
LOW- AND HIGH-LEVEL ENABLING
t
PLZ
1.5 V
t
PHZ
1.5 V
Open
7 V
Open
1.5 V
VOL + 0.3 V
VOH – 0.3 V
2.7 V
0 V
3.5 V
V
OL
V
OH
[
0 V
Figure 4. Load Circuit and Voltage Waveforms
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
9
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accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
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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
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Copyright 1998, Texas Instruments Incorporated
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