Datasheet 搜索 > 逻辑控制器 > TI（德州仪器） > SN74HC244ANSR 数据手册 > SN74HC244ANSR 产品封装文件 1/2 页
器件3D模型￥ 0.698
SN74HC244ANSR 产品封装文件 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
逻辑控制器
封装:
SOP-20
描述:
缓冲器/驱动器/收发器 SN74HC244ANSR SO-20
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SN74HC244ANSR数据手册
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A/D - Input
V
cc
Microcontroller
5 V
5 V
Sensor
SN74HC4851
Analog multiplexer/demultiplexer
with injection current effect control
R ELIABLE. LOGI
C
. INNOV
A
TION
.
TM
Texas Instruments’ (TI) new SN74HC4851, analog multi-
plexer/demultiplexer (mux/demux) device is pin compati-
ble with the 4051 function. The HC4851 also offers
injection current protection, which makes it an ideal solu-
tion in harsh environments such as automotive, where
voltage spikes in excess of normal logic voltage levels are
common. The injection current effect control circuitry
eliminates the need for external diode/resistor networks
typically used to keep the analog channel signals within
the supply voltage range. TI offers the HC4851 in a vari-
ety of package options: PDIP, SOIC, TSSOP and TVSOP.
Benefits
• Injection current protection for use in harsh environments such
as Automotive
• Injection current cross-coupling <1 mV/mA
• Low crosstalk between switches
• Extended temperature range: –40 to 125°C
• Pin compatible with SN74HC4051, SN74LV4051A
and CD4051B
• Direct second source to ST M74HC4851 and ON M74HC4851A
Features
• 2-V to 6-V V
CC
operation
• T
pd
= 8.6 ns (typ.) at T
A
= 25ºC, V
CC
= 4.5 V
• Latch-up performance exceeds 100 mA per JESD 78, Class II
• ESD protection exceeds JESD 22:
• 2000-V human-body model (A114-A)
• 200-V machine model (A115-A)
• 1000-V charged-device model (C101)
Alternate solution needs external passive components
and one extra 6-V regulator to suppress injection current
into a standard HC4051 multiplexer.
Microcontroller
A/D - Input
Common Out
V
cc
V
cc
5 V
6 V
5 V
(8x Identical Circuitry)
Channel 1
HC4051A
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Channel 7
Channel 8
Sensor
Single-Chip
Solution
TI’s HC4851 single-chip solution eliminates the need
for external diodes and resistors.
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