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BUS TRANSCEIVER. SN74AUCH245 Datasheet

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BUS TRANSCEIVER. SN74AUCH245 Datasheet






SN74AUCH245 TRANSCEIVER. Datasheet pdf. Equivalent




SN74AUCH245 TRANSCEIVER. Datasheet pdf. Equivalent





Part

SN74AUCH245

Description

OCTAL BUS TRANSCEIVER



Feature


D Optimized for 1.8-V Operation and Is 3 .6-V I/O Tolerant to Support Mixed-Mode Signal Operation D Ioff Supports Parti al-Power-Down Mode Operation D Sub 1-V Operable D Max tpd of 2 ns at 1.8 V D L ow Power Consumption, 20-µA Max ICC D ±8-mA Output Drive at 1.8 V D Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors D L atch-Up Performance .
Manufacture

Texas Instruments

Datasheet
Download SN74AUCH245 Datasheet


Texas Instruments SN74AUCH245

SN74AUCH245; Exceeds 100 mA Per JESD 78, Class II D E SD Protection Exceeds JESD 22 – 2000- V Human-Body Model (A114-A) – 200-V M achine Model (A115-A) – 1000-V Charge d-Device Model (C101) GND B8 SN74AUCH 245 OCTAL BUS TRANSCEIVER WITH 3ĆSTATE OUTPUTS SCES420 – JANUARY 2003 RGY P ACKAGE (TOP VIEW) DIR VCC 1 A1 2 A2 3 A3 4 A4 5 A5 6 A6 7 A7 8 A8 9 10 20 1 9 OE 18 B1 17 B2 16 B3 15 B.


Texas Instruments SN74AUCH245

4 14 B5 13 B6 12 B7 11 description/orde ring information This octal bus transc eiver is operational at 0.8-V to 2.7-V VCC, but is designed specifically for 1 .65-V to 1.95-V VCC operation. The SN74 AUCH245 is designed for asynchronous co mmunication between data buses. The dev ice transmits data from the A bus to th e B bus or from the B bus to the A bus, depending on the .


Texas Instruments SN74AUCH245

logic level at the direction-control (DI R) input. The output-enable (OE) input can be used to disable the device so th e buses are effectively isolated. To en sure the high-impedance state during po wer up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determ ined by the current-sinking capability of the driver. Act.

Part

SN74AUCH245

Description

OCTAL BUS TRANSCEIVER



Feature


D Optimized for 1.8-V Operation and Is 3 .6-V I/O Tolerant to Support Mixed-Mode Signal Operation D Ioff Supports Parti al-Power-Down Mode Operation D Sub 1-V Operable D Max tpd of 2 ns at 1.8 V D L ow Power Consumption, 20-µA Max ICC D ±8-mA Output Drive at 1.8 V D Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors D L atch-Up Performance .
Manufacture

Texas Instruments

Datasheet
Download SN74AUCH245 Datasheet




 SN74AUCH245
D Optimized for 1.8-V Operation and Is 3.6-V
I/O Tolerant to Support Mixed-Mode Signal
Operation
D Ioff Supports Partial-Power-Down Mode
Operation
D Sub 1-V Operable
D Max tpd of 2 ns at 1.8 V
D Low Power Consumption, 20-µA Max ICC
D ±8-mA Output Drive at 1.8 V
D Bus Hold on Data Inputs Eliminates the
Need for External Pullup/Pulldown
Resistors
D Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
D ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
SN74AUCH245
OCTAL BUS TRANSCEIVER
WITH 3ĆSTATE OUTPUTS
SCES420 – JANUARY 2003
RGY PACKAGE
(TOP VIEW)
1
A1 2
A2 3
A3 4
A4 5
A5 6
A6 7
A7 8
A8 9
10
20
19 OE
18 B1
17 B2
16 B3
15 B4
14 B5
13 B6
12 B7
11
description/ordering information
This octal bus transceiver is operational at 0.8-V to 2.7-V VCC, but is designed specifically for 1.65-V to 1.95-V
VCC operation.
The SN74AUCH245 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.
To 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.
Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors
with the bus-hold circuitry is not recommended.
This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs,
preventing damaging current backflow through the device when it is powered down.
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
–40°C to 85°C QFN – RGY
Tape and reel SN74AUCH245RGYR
MT245
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design
guidelines are available at www.ti.com/sc/package.
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.
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 2003, Texas Instruments Incorporated
1




 SN74AUCH245
SN74AUCH245
OCTAL BUS TRANSCEIVER
WITH 3ĆSTATE OUTPUTS
SCES420 JANUARY 2003
logic diagram (positive logic)
1
DIR
A1 2
FUNCTION TABLE
INPUTS
OE DIR
OPERATION
L
L
B data to A bus
L
H A data to B bus
H
X
Isolation
19
OE
18
B1
To Seven Other Channels
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 3.6 V
Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 3.6 V
Voltage range applied to any output in the high-impedance or power-off state, VO
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 3.6 V
Output voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to VCC + 0.5 V
Input clamp current, IIK (VI < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA
Output clamp current, IOK (VO < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA
Continuous output current, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±100 mA
Package thermal impedance, θJA (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37°C/W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C
Stresses beyond those listed under absolute maximum ratingsmay 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 conditionsis 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 package thermal impedance is calculated in accordance with JESD 51-5.
2
POST OFFICE BOX 655303 DALLAS, TEXAS 75265




 SN74AUCH245
SN74AUCH245
OCTAL BUS TRANSCEIVER
WITH 3ĆSTATE OUTPUTS
SCES420 JANUARY 2003
recommended operating conditions (see Note 3)
MIN
MAX
UNIT
VCC Supply voltage
VIH High-level input voltage
VIL
Low-level input voltage
VI
Input voltage
VO
Output voltage
VCC = 0.8 V
VCC = 1.1 V to 1.95 V
VCC = 2.3 V to 2.7 V
VCC = 0.8 V
VCC = 1.1 V to 1.95 V
VCC = 2.3 V to 2.7 V
Active state
3-state
0.8
2.7
V
VCC
0.65 × VCC
V
1.7
0
0.35 × VCC V
0.7
0
3.6
V
0
VCC
V
0
3.6
IOH High-level output current
IOL
Low-level output current
t/v Input transition rise or fall rate
VCC = 0.8 V
VCC = 1.1 V
VCC = 1.4 V
VCC = 1.65 V
VCC = 2.3 V
VCC = 0.8 V
VCC = 1.1 V
VCC = 1.4 V
VCC = 1.65 V
VCC = 2.3 V
0.7
3
5
mA
8
9
0.7
3
5
mA
8
9
20
ns/V
TA
Operating free-air temperature
40
85
°C
NOTE 3: 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,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
3



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