SN74AHC245-Q1 Transceivers Datasheet

SN74AHC245-Q1 Datasheet, PDF, Equivalent


Part Number

SN74AHC245-Q1

Description

Octal Bus Transceivers

Manufacture

etcTI

Total Page 12 Pages
Datasheet
Download SN74AHC245-Q1 Datasheet


SN74AHC245-Q1
SN74AHC245ĆQ1
OCTAL BUS TRANSCEIVER
WITH 3ĆSTATE OUTPUTS
SCLS527A − AUGUST 2003 − REVISED APRIL 2008
D Qualified for Automotive Applications
D ESD Protection Exceeds 1000 V Per
MIL-STD-883, Method 3015; Exceeds 100 V
Using Machine Model (C = 200 pF, R = 0)
D Operating Range 2-V to 5.5-V VCC
description/ordering information
The SN74AHC245 octal bus transceiver is designed
for asynchronous two-way communication between
data buses. The control-function implementation
minimizes external timing requirements.
This device allows data transmission 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 that the buses effectively are isolated.
DW OR PW PACKAGE
(TOP VIEW)
DIR
A1
A2
A3
A4
A5
A6
A7
A8
GND
1
2
3
4
5
6
7
8
9
10
20 VCC
19 OE
18 B1
17 B2
16 B3
15 B4
14 B5
13 B6
12 B7
11 B8
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.
ORDERING INFORMATION{
TA
PACKAGE‡
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
−40°C to 125°C
SOIC − DW Tape and reel
TSSOP − PW Tape and reel
SN74AHC245QDWRQ1
SN74AHC245QPWRQ1
AHC245Q1
AHC245Q1
For the most current package and ordering information, see the Package Option Addendum at the end of
this document, or see the TI web site at http://www.ti.com.
Package drawings, thermal data, and symbolization are available at http://www.ti.com/packaging.
FUNCTION TABLE
(each transceiver)
INPUTS
OE DIR
OPERATION
L L B data to A bus
L H A data to B bus
HX
Isolation
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 2008, Texas Instruments Incorporated
1

SN74AHC245-Q1
SN74AHC245ĆQ1
OCTAL BUS TRANSCEIVER
WITH 3ĆSTATE OUTPUTS
SCLS527A − AUGUST 2003 − REVISED APRIL 2008
logic diagram (positive logic)
1
DIR
A1 2
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 7 V
Input voltage range, VI (see Note 1): Control inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
I/O, output voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to VCC + 0.5 V
Input clamp current, IIK (VI < 0): Control inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −20 mA
I/O, output clamp current, IOK (VO < 0 or VO > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±25 mA
Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±75 mA
Package thermal impedance, θJA (see Note 2): DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W
PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83°C/W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
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 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 51-7.
2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265


Features SN74AHC245ĆQ1 OCTAL BUS TRANSCEIVER WIT H 3ĆSTATE OUTPUTS SCLS527A − AUGUST 2003 − REVISED APRIL 2008 D Qualifie d for Automotive Applications D ESD Pro tection Exceeds 1000 V Per MIL-STD-883, Method 3015; Exceeds 100 V Using Machi ne Model (C = 200 pF, R = 0) D Operatin g Range 2-V to 5.5-V VCC description/or dering information The SN74AHC245 octal bus transceiver is designed for asynch ronous two-way communication between da ta buses. The control-function implemen tation minimizes external timing requir ements. This device allows data transmi ssion from the A bus to the B bus or fr om the B bus to the A bus, depending on the logic level at the direction-contr ol (DIR) input. The output-enable (OE) input can be used to disable the device so that the buses effectively are isol ated. DW OR PW PACKAGE (TOP VIEW) DIR A1 A2 A3 A4 A5 A6 A7 A8 GND 1 2 3 4 5 6 7 8 9 10 20 VCC 19 OE 18 B1 17 B2 1 6 B3 15 B4 14 B5 13 B6 12 B7 11 B8 To ensure the high-impedance state during power up or power down, OE sho.
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