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SN74LVCH244A Datasheet Preview

SN74LVCH244A Datasheet

OCTAL BUFFERS/DRIVERS

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SN54LVCH244A, SN74LVCH244A
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCES009O – JULY 1995 – REVISED FEBRUARY 2007
FEATURES
Operate From 1.65 V to 3.6 V
Inputs Accept Voltages to 5.5 V
Max tpd of 5.9 ns at 3.3 V
Typical VOLP (Output Ground Bounce)
<0.8 V at VCC = 3.3 V, TA = 25°C
Typical VOHV (Output VOH Undershoot)
>2 V at VCC = 3.3 V, TA = 25°C
Support Mixed-Mode Signal Operation on All
Ports
(5-V Input/Output Voltage With 3.3-V VCC)
Ioff Supports Partial-Power-Down Mode
Operation
Bus Hold on Data Inputs Eliminates the Need
for External Pullup/Pulldown Resistors
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)
SN54LVCH244A . . . J OR W PACKAGE
SN74LVCH244A . . . DB, DBQ, DGV, DW,
NS, OR PW PACKAGE
(TOP VIEW)
SN74LVCH244A . . . RGY PACKAGE
(TOP VIEW)
SN54LVCH244A . . . FK PACKAGE
(TOP VIEW)
1OE 1
1A1 2
2Y4 3
1A2 4
2Y3 5
1A3 6
2Y2 7
1A4 8
2Y1 9
GND 10
20 VCC
19 2OE
18 1Y1
17 2A4
16 1Y2
15 2A3
14 1Y3
13 2A2
12 1Y4
11 2A1
1
1A1 2
2Y4 3
1A2 4
2Y3 5
1A3 6
2Y2 7
1A4 8
2Y1 9
10
20
19 2OE
18 1Y1
17 2A4
16 1Y2
15 2A3
14 1Y3
13 2A2
12 1Y4
11
3 2 1 20 19
1A2 4
18 1Y1
2Y3 5
17 2A4
1A3 6
16 1Y2
2Y2 7
15 2A3
1A4 8
14 1Y3
9 10 11 12 13
DESCRIPTION/ORDERING INFORMATION
The SN54LVCH244A octal buffer/line driver is designed for 2.7-V to 3.6-V VCC operation, and the
SN74LVCH244A octal buffer/line driver is designed for 1.65-V to 3.6-V VCC operation.
These devices are organized as two 4-bit line drivers with separate output-enable (OE) inputs. When OE is low,
these devices pass data from the A inputs to the Y outputs. When OE is high, the outputs are in the
high-impedance state.
Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown
resistors with the bus-hold circuitry is not recommended.
Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators
in a mixed 3.3-V/5-V system environment.
These devices are fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the
outputs, preventing damaging current backflow through the devices when they are powered down.
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.
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 © 1995–2007, Texas Instruments Incorporated




etcTI

SN74LVCH244A Datasheet Preview

SN74LVCH244A Datasheet

OCTAL BUFFERS/DRIVERS

No Preview Available !

SN54LVCH244A, SN74LVCH244A
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCES009O – JULY 1995 – REVISED FEBRUARY 2007
www.ti.com
TA
–40°C to 85°C
–55°C to 125°C
ORDERING INFORMATION
PACKAGE (1)
ORDERABLE PART NUMBER
QFN – RGY
Reel of 1000
SN74LVCH244ARGYR
SOIC – DW
Tube of 25
Reel of 2000
SN74LVCH244ADW
SN74LVCH244ADWR
SOP – NS
Reel of 2000
SN74LVCH244ANSR
SSOP – DB
Reel of 2000
SN74LVCH244ADBR
SSOP (QSOP) – DBQ
Reel of 2500
SN74LVCH244ADBQR
Tube of 70
SN74LVCH244APW
TSSOP – PW
Reel of 2000
SN74LVCH244APWR
Reel of 250
SN74LVCH244APWT
TVSOP – DGV
Reel of 2000
SN74LVCH244ADGVR
CDIP – J
Tube of 20
SNJ54LVCH244AJ
CFP – W
Tube of 85
SNJ54LVCH244AW
LCCC – FK
Tube of 55
SNJ54LVCH244AFK
TOP-SIDE MARKING
LCH244A
LVCH244A
LVCH244A
LCH244A
LVCH244A
LCH244A
LCH244A
SNJ54LVCH244AJ
SNJ54LVCH244AW
SNJ54LVCH244AFK
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
FUNCTION TABLE
(EACH BUFFER)
INPUTS
OE
A
L
H
L
L
H
X
OUTPUT
Y
H
L
Z
1OE 1
LOGIC DIAGRAM (POSITIVE LOGIC)
2OE 19
1A1 2
18 1Y1
2A1 11
9 2Y1
1A2 4
16 1Y2
2A2 13
7 2Y2
6
1A3
14 1Y3
15
2A3
5 2Y3
1A4 8
12 1Y4
2A4 17
3 2Y4
2
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Part Number SN74LVCH244A
Description OCTAL BUFFERS/DRIVERS
Maker etcTI
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