SN54AHC245 PACKAGE SN74AHC245 DGV, PACKAGE (TOP VIEW) description

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SN54AHC245, SN74AHC245 OCTAL TRANSCEIVERS WITH 3-STATE OUTPUTS
SN54AHC245 PACKAGE SN74AHC245 DGV, PACKAGE (TOP VIEW)
description
'AHC245 octal transceivers designed asynchronous two-way communication between data buses. control-function implementation minimizes external timing requirements. These devices allow data transmission from from bus, depending logic level direction-control (DIR) input. output-enable (OE) input used disable device that buses effectively isolated. ensure high-impedance state during power power down, should tied through pullup resistor; minimum value resistor determined current-sinking capability driver.
SN54AHC245 PACKAGE (TOP VIEW)
ORDERING INFORMATION
PDIP SOIC -40°C 85°C 40°C SSOP TSSOP TVSOP CDIP -55°C 125°C LCCC PACKAGE Tube Tube Tape reel Tape reel Tape reel Tape reel Tube Tube Tube ORDERABLE PART NUMBER SN74AHC245N SN74AHC245DW SN74AHC245DWR SN74AHC245DBR SN74AHC245PWR SN74AHC245DGVR SNJ54AHC245J SNJ54AHC245W SNJ54AHC245FK TOP-SIDE MARKING SN74AHC245N AHC245 HA245 HA245 HA245 SNJ54AHC245J SNJ54AHC245W SNJ54AHC245FK
Package drawings, standard packing quantities, thermal data, symbolization, design guidelines available www.ti.com/sc/package.
Please aware that important notice concerning availability, standard warranty, critical applications Texas Instruments semiconductor products disclaimers thereto appears this data sheet.
Copyright 2000, Texas Instruments Incorporated
products compliant MIL-PRF-38535, parameters tested unless otherwise noted. other products, production processing does necessarily include testing parameters.
PRODUCTION DATA information current publication date. Products conform specifications terms Texas Instruments standard warranty. Production processing does necessarily include testing parameters.
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SN54AHC245, SN74AHC245 OCTAL TRANSCEIVERS WITH 3-STATE OUTPUTS
FUNCTION TABLE (each transceiver) INPUTS OPERATION data data Isolation
logic symbol
[BA] [AB]
This symbol accordance with ANSI/IEEE 91-1984 Publication 617-12.
logic diagram (positive logic)
Seven Other Channels
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SN54AHC245, SN74AHC245 OCTAL TRANSCEIVERS WITH 3-STATE OUTPUTS
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, -0.5 Input voltage range, (see Note Control inputs -0.5 I/O, Output voltage range, (see Note -0.5 Input clamp current, Control inputs I/O, Output clamp current, VCC) Continuous output current, VCC) Continuous current through Package thermal impedance, (see Note package 70°C/W package 92°C/W package 58°C/W package 69°C/W package 83°C/W Storage temperature range, Tstg -65°C 150°C
Stresses beyond those listed under "absolute maximum ratings" cause permanent damage device. These stress ratings only, functional operation device these other conditions beyond those indicated under "recommended operating conditions" implied. Exposure absolute-maximum-rated conditions extended periods affect device reliability. NOTES: input output voltage ratings exceeded input output current ratings observed. package thermal impedance calculated accordance with JESD 51-7.
recommended operating conditions (see Note
SN54AHC245 Supply voltage High-level input voltage Low-level input voltage Input voltage Output voltage High-level output current Low-level output current 3.85 1.65 SN74AHC245 3.85 1.65 UNIT
ns/V
Input transition rise fall rate
Operating free-air temperature NOTE unused inputs device must held ensure proper device operation. Refer application report, Implications Slow Floating CMOS Inputs, literature number SCBA004.
POST OFFICE 655303
DALLAS, TEXAS 75265
SN54AHC245, SN74AHC245 OCTAL TRANSCEIVERS WITH 3-STATE OUTPUTS
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS inputs inputs GND, (OE) GND, 2.58 3.94 0.36 0.36 ±0.1 ±0.1 ±0.25 25°C SN54AHC245 2.48 ±2.5 SN74AHC245 2.48 0.44 0.44 ±2.5 UNIT
products compliant MIL-PRF-38535, this parameter production tested parameter includes input leakage current.
switching characteristics over recommended operating (unless otherwise noted) (see Figure
PARAMETER tPLH tPHL tPZH tPZL tPHZ tPLZ tPLH tPHL tPZH tPZL tPHZ tPLZ tsk(o) FROM (INPUT) (OUTPUT) LOAD CAPACITANCE
free-air
temperature
SN74AHC245 15.5 15.5 15.5 15.5 13.5 13.5
range,
UNIT
25°C 5.8** 5.8** 8.5** 8.5** 8.9** 8.9** 11.5 11.5 8.4** 8.4** 13.2** 13.2** 12.5** 12.5** 11.9 11.9 16.7 16.7 15.8 15.8 1.5***
SN54AHC245 10** 10** 15.5** 15.5** 15.5** 15.5** 13.5 13.5
products compliant MIL-PRF-38535, this parameter production tested. products compliant MIL-PRF-38535, this parameter does apply.
POST OFFICE 655303
DALLAS, TEXAS 75265
SN54AHC245, SN74AHC245 OCTAL TRANSCEIVERS WITH 3-STATE OUTPUTS
switching characteristics over recommended operating (unless otherwise noted) (see Figure
PARAMETER tPLH tPHL tPZH tPZL tPHZ tPLZ tPLH tPHL tPZH tPZL tPHZ tPLZ tsk(o) FROM (INPUT) (OUTPUT) LOAD CAPACITANCE
free-air
temperature
SN74AHC245
range,
UNIT
25°C 5.8* 5.8* 5.6* 5.6* 5.5* 5.5* 8.5* 8.5* 7.8* 7.8* 10.6 10.6
SN54AHC245 6.5* 6.5* 9.2* 9.2*
products compliant MIL-PRF-38535, this parameter production tested. products compliant MIL-PRF-38535, this parameter does apply.
noise characteristics, 25°C (see Note
PARAMETER VOL(P) VOL(V) VOH(V) VIH(D) Quiet output, maximum dynamic Quiet output, minimum dynamic Quiet output, minimum dynamic High-level dynamic input voltage SN74AHC245 -0.9 UNIT
VIL(D) Low-level dynamic input voltage NOTE Characteristics surface-mount packages only.
operating characteristics, 25°C
PARAMETER Power dissipation capacitance TEST CONDITIONS load, UNIT
POST OFFICE 655303
DALLAS, TEXAS 75265
SN54AHC245, SN74AHC245 OCTAL TRANSCEIVERS WITH 3-STATE OUTPUTS
PARAMETER MEASUREMENT INFORMATION
Open
From Output Under Test (see Note
Test Point
From Output Under Test (see Note
TEST tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open Drain
Open
LOAD CIRCUIT TOTEM-POLE OUTPUTS
LOAD CIRCUIT 3-STATE OPEN-DRAIN OUTPUTS Timing Input Data Input VOLTAGE WAVEFORMS SETUP HOLD TIMES tPZL tPZH Output Waveform (see Note tPLZ tPHZ
Input
VOLTAGE WAVEFORMS PULSE DURATION
Input tPLH In-Phase Output tPHL Out-of-Phase Output
tPHL
Output Control
tPLH
Output Waveform (see Note
VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES INVERTING NONINVERTING OUTPUTS
VOLTAGE WAVEFORMS ENABLE DISABLE TIMES LOW- HIGH-LEVEL ENABLING
NOTES: includes probe capacitance. Waveform output with internal conditions such that output except when disabled output control. Waveform output with internal conditions such that output high except when disabled output control. input pulses supplied generators having following characteristics: MHz, outputs measured time with input transition measurement.
Figure Load Circuit Voltage Waveforms
POST OFFICE 655303
DALLAS, TEXAS 75265
IMPORTANT NOTICE Texas Instruments subsidiaries (TI) reserve right make changes their products discontinue product service without notice, advise customers obtain latest version relevant information verify, before placing orders, that information being relied current complete. products sold subject terms conditions sale supplied time order acknowledgment, including those pertaining warranty, patent infringement, limitation liability. warrants performance semiconductor products specifications applicable time sale accordance with TI's standard warranty. Testing other quality control techniques utilized extent deems necessary support this warranty. Specific testing parameters each device necessarily performed, except those mandated government requirements. Customers responsible their applications using components. order minimize risks associated with customer's applications, adequate design operating safeguards must provided customer minimize inherent procedural hazards. assumes liability applications assistance customer product design. does warrant represent that license, either express implied, granted under patent right, copyright, mask work right, other intellectual property right covering relating combination, machine, process which such semiconductor products services might used. TI's publication information regarding third party's products services does constitute TI's approval, warranty endorsement thereof.
Copyright 2000, Texas Instruments Incorporated

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