SN74AUC245 TRANSCEIVER Datasheet

SN74AUC245 Datasheet, PDF, Equivalent


Part Number

SN74AUC245

Description

OCTAL BUS TRANSCEIVER

Manufacture

etcTI

Total Page 16 Pages
Datasheet
Download SN74AUC245 Datasheet


SN74AUC245
www.ti.com
FEATURES
Optimized for 1.8-V Operation and Is 3.6-V I/O
Tolerant to Support Mixed-Mode Signal
Operation
Ioff Supports Partial-Power-Down Mode
Operation
Sub-1-V Operable
Max tpd of 1.7 ns at 1.8 V
Low Power Consumption, 20-µA Max ICC
• ±8-mA Output Drive at 1.8 V
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
SN74AUC245
OCTAL BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
SCES419A – JANUARY 2003 – REVISED MARCH 2005
RGY PACKAGE
(TOP VIEW)
A1 2
A2 3
A3 4
A4 5
A5 6
A6 7
A7 8
A8 9
1
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 SN74AUC245 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.
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.
TA
–40°C to 85°C
ORDERING INFORMATION
PACKAGE (1)
ORDERABLE PART NUMBER
QFN – RGY
Tape and reel
SN74AUC245RGYR
VFBGA – GQN Tape and reel
SN74AUC245GQNR
TOP-SIDE MARKING
MS245
MS245
(1) 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 the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2003–2005, Texas Instruments Incorporated

SN74AUC245
SN74AUC245
OCTAL BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
SCES419A – JANUARY 2003 – REVISED MARCH 2005
GQN PACKAGE
(TOP VIEW)
1234
A
B
C
D
E
TERMINAL ASSIGNMENTS
1234
A A1
B A3
DIR VCC
B2 A2
OE
B1
C A5 A4 B4 B3
D A7 B6 A6 B5
E GND
A8
B8
B7
FUNCTION TABLE
INPUTS
OE DIR
LL
LH
HX
OPERATION
B data to A bus
A data to B bus
Isolation
LOGIC DIAGRAM (POSITIVE LOGIC)
1
DIR
19
OE
A1 2
18
B1
To Seven Other Channels
Pin numbers shown are for the RGY package.
www.ti.com
2


Features www.ti.com FEATURES • Optimized for 1. 8-V Operation and Is 3.6-V I/O Tolerant to Support Mixed-Mode Signal Operation • Ioff Supports Partial-Power-Down M ode Operation • Sub-1-V Operable • Max tpd of 1.7 ns at 1.8 V • Low Powe r Consumption, 20-µA Max ICC • ±8-m A Output Drive at 1.8 V • Latch-Up Pe rformance Exceeds 100 mA Per JESD 78, C lass II • ESD Protection Exceeds JESD 22 – 2000-V Human-Body Model (A114-A ) – 200-V Machine Model (A115-A) – 1000-V Charged-Device Model (C101) GND B8 SN74AUC245 OCTAL BUS TRANSCEIVER W ITH 3-STATE OUTPUTS SCES419A – JANUAR Y 2003 – REVISED MARCH 2005 RGY PACKA GE (TOP VIEW) DIR VCC A1 2 A2 3 A3 4 A4 5 A5 6 A6 7 A7 8 A8 9 1 10 20 19 O E 18 B1 17 B2 16 B3 15 B4 14 B5 13 B6 1 2 B7 11 DESCRIPTION/ORDERING INFORMATI ON This octal bus transceiver is operat ional at 0.8-V to 2.7-V VCC, but is des igned specifically for 1.65-V to 1.95-V VCC operation. The SN74AUC245 is desig ned for asynchronous communication between data buses. The device transmits data from the A.
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