EPIC (Enhanced-Performance Implanted CMOS) 1-µm Process Package Option

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EPIC (Enhanced-Performance Implanted CMOS) 1-µm Process Package Option

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SN54AC240, SN74AC240 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
EPIC (Enhanced-Performance Implanted CMOS) 1-µm Process Package Options Include Plastic Small-Outline (DW), Shrink Small-Outline (DB), Thin Shrink Small-Outline (PW), Packages, Ceramic Chip Carriers (FK), Flat (W), Packages
SN54AC240 PACKAGE SN74AC240 PACKAGE (TOP VIEW)
description
These octal buffers line drivers designed specifically improve performance density 3-state memory address drivers, clock drivers, bus-oriented receivers transmitters. 'AC240 organized 4-bit buffers/drivers with separate output-enable (OE) inputs. When low, device passes inverted data from inputs outputs. When high, outputs high-impedance state. SN54AC240 characterized operation over full military temperature range 55°C 125°C. SN74AC240 characterized operation from 40°C 85°C.
FUNCTION TABLE (each buffer) INPUTS OUTPUT
SN54AC240 PACKAGE (TOP VIEW)
Please aware that important notice concerning availability, standard warranty, critical applications Texas Instruments semiconductor products disclaimers thereto appears this data sheet. EPIC trademark Texas Instruments Incorporated.
PRODUCTION DATA information current publication date. Products conform specifications terms Texas Instruments standard warranty. Production processing does necessarily include testing parameters.
Copyright 1996, Texas Instruments Incorporated
POST OFFICE 655303
DALLAS, TEXAS 75265
SN54AC240, SN74AC240 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
logic symbol
logic diagram (positive logic)
This symbol accordance with ANSI/IEEE 91-1984 Publication 617-12.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, Input voltage range, (see Note Output voltage range, (see Note Input clamp current, VCC) Output clamp current, VCC) Continuous output current, VCC) Continuous current through Maximum power dissipation 55°C still air) (see Note package package package package 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. maximum package power dissipation calculated using junction temperature 150°C board trace length mils, except package, which trace length zero.
POST OFFICE 655303
DALLAS, TEXAS 75265
SN54AC240, SN74AC240 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
recommended operating conditions (see Note
SN54AC240 Supply voltage High-level input voltage Low-level input voltage Input voltage Output voltage High-level output current Low-level output current Input transition rise fall rate 3.15 3.85 1.35 1.65 SN74AC240 3.15 3.85 1.35 1.65 UNIT
Operating free-air temperature NOTE Unused inputs must held high prevent them from floating.
POST OFFICE 655303
DALLAS, TEXAS 75265
SN54AC240, SN74AC240 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS Data inputs Control inputs GND, VI(OE) 0.25 0.36 0.36 0.36 1.65 1.65 2.56 3.86 4.86 25°C SN54AC240 3.85 3.85 0.44 0.44 0.44 SN74AC240 2.46 3.76 4.76 UNIT
GND, more than output should tested time, duration test should exceed ports, parameter includes input leakage current.
switching characteristics over recommended operating (unless otherwise noted) (see Figure
PARAMETER tPLH tPHL tPZH tPZL tPHZ tPLZ FROM (INPUT) (OUTPUT)
free-air
temperature
SN74AC240 10.5 11.5
range,
UNIT
25°C 10.5 10.5
SN54AC240 10.5 11.5 12.5 13.5
POST OFFICE 655303
DALLAS, TEXAS 75265
SN54AC240, SN74AC240 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
switching characteristics over recommended operating (unless otherwise noted) (see Figure
PARAMETER tPLH tPHL tPZH tPZL tPHZ tPLZ FROM (INPUT) (OUTPUT)
free-air
temperature
SN74AC240
range,
UNIT
25°C
SN54AC240 10.5 10.5
operating characteristics, 25°C
PARAMETER Power dissipation capacitance buffer/driver TEST CONDITIONS UNIT
PARAMETER MEASUREMENT INFORMATION
From Output Under Test (see Note Open TEST tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open Open
LOAD CIRCUIT
Output Control (low-level enabling) Output Waveform (see Note Output Waveform Open (see Note
tPZL tPLZ tPZH tPHZ
Input tPLH
tPHL
Output
VOLTAGE WAVEFORMS
VOLTAGE WAVEFORMS
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
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Copyright 1998, Texas Instruments Incorporated

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