参数资料
型号: SN74LVCZ244ADWE4
厂商: Texas Instruments, Inc.
英文描述: OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS
中文描述: 八路缓冲器/ 3驱动态输出
文件页数: 1/16页
文件大小: 412K
代理商: SN74LVCZ244ADWE4
SN74LVCZ244A
OCTAL BUFFER/DRIVER
WITH 3-STATE OUTPUTS
SCES274H – JUNE 1999 – REVISED AUGUST 2003
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Operates From 2.7 V to 3.6 V
Inputs Accept Voltages to 5.5 V
Max t
pd
of 5.9 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
I
off
and Power-Up 3-State Support Hot
Insertion
Supports Mixed-Mode Signal Operation on
All Ports (5-V Input/Output Voltage With
3.3-V V
CC
)
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
description/ordering information
This octal buffer/line driver is designed for 2.7-V to 3.6-V V
CC
operation.
The SN74LVCZ244A is organized as two 4-bit line 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.
When V
CC
is between 0 and 1.5 V, the device is in the high-impedance state during power up or power down.
However, to ensure the high-impedance state above 1.5 V, 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 hot-insertion applications using I
off
and power-up 3-state. The I
off
circuitry
disables the outputs, preventing damaging current backflow through the device when it is powered down. The
power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down,
which prevents driver conflict.
ORDERING INFORMATION
TA
PACKAGE
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
–40 C to 85 C
PDIP – N
Tube of 20
SN74LVCZ244AN
SN74LVCZ244AN
SOIC – DW
Tube of 25
SN74LVCZ244ADW
LVCZ244A
Reel of 2000
SN74LVCZ244ADWR
SOP – NS
Reel of 2000
SN74LVCZ244ANSR
LVCZ244A
SSOP – DB
Reel of 2000
Tube of 70
SN74LVCZ244ADBR
SN74LVCZ244APW
CV244A
TSSOP – PW
CV244A
Reel of 2000
SN74LVCZ244APWR
Reel of 250
SN74LVCZ244APWT
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines
are available at www.ti.com/sc/package.
Copyright
2003, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
standard warranty. Production processing does not necessarily include
testing of all parameters.
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.
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
V
CC
2OE
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1
DB, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
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