SN74LVC240A_08 Datasheet, PDF (1/14 Pages) Texas Instruments – OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS

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FEATURES
• Operates From 1.65 V to 3.6 V
• Inputs Accept Voltages to 5.5 V
• Max t_pd of 6.5 ns at 3.3 V
• Typical V_OLP (Output Ground Bounce)
<0.8 V at V_CC = 3.3 V, T_A = 25°C
• Typical V_OHV (Output V_OH Undershoot)
>2 V at V_CC = 3.3 V, T_A = 25°C
• Supports Mixed-Mode Signal Operation on All
Ports (5-V Input/Output Voltage With
3.3-V V_CC)
• I_off Supports Partial-Power-Down-Mode
Operation
• Latch-Up Performance Exceeds 250 mA Per
JESD 17
• ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
SN74LVC240A
OCTAL BUFFER/DRIVER
WITH 3-STATE OUTPUTS
SCAS293K – JANUARY 1993 – REVISED FEBRUARY 2005
DB, DGV, DW, NS, OR PW PACKAGE
(TOP VIEW)
1OE 1
1A1 2
2Y4 ³
1A2 ⁴
2Y3 ⁵
1A3 ⁶
2Y2 ⁷
1A4 ⁸
2Y1 ⁹
GND ¹⁰
20 V_CC
19 2OE
18 _1Y1
17 _2A4
16 _1Y2
15 _2A3
14 _1Y3
13 _2A2
12 _1Y4
11 _2A1
DESCRIPTION/ORDERING INFORMATION
This octal buffer/driver is designed for 1.65-V to 3.6-V V_CC operation.
The SN74LVC240A is designed specifically to improve the performance and density of 3-state memory address
drivers, clock drivers, and bus-oriented receivers and transmitters.
This device is organized as two 4-bit buffers/drivers with separate output-enable (OE) inputs. When OE is low,
the device passes data from the A inputs to the Y outputs. When OE is high, the outputs are in the
high-impedance state.
Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of this device as a translator in
a mixed 3.3-V/5-V system environment.
To ensure the high-impedance state during power up or power down, OE should be tied to V_CC 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 I_off. The I_off circuitry disables the outputs,
preventing damaging current backflow through the device when it is powered down.
T_A
–40°C to 85°C
SOIC – DW
SOP – NS
SSOP – DB
TSSOP – PW
TVSOP – DGV
ORDERING INFORMATION
PACKAGE ⁽¹⁾
ORDERABLE PART NUMBER
Tube of 25
SN74LVC240ADW
Reel of 2000
SN74LVC240ADWR
Reel of 2000
SN74LVC240ANSR
Reel of 2000
SN74LVC240ADBR
Tube of 70
SN74LVC240APW
Reel of 2000
SN74LVC240APWR
Reel of 250
SN74LVC240APWT
Reel of 2000
SN74LVC240ADGVR
TOP-SIDE MARKING
LVC240A
LVC240A
LC240A
LC240A
LC240A
(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 © 1993–2005, Texas Instruments Incorporated