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參數(shù)資料
| 型號： | 935190070118 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 多路復(fù)用及模擬開關(guān) |
| 英文描述： | 8-CHANNEL, SGL ENDED MULTIPLEXER, PDSO20 |
| 封裝： | SOT-339, SSOP-20 |
| 文件頁數(shù)： | 12/21頁 |
| 文件大小： | 205K |
| 代理商： | 935190070118 |
December 1990
2
Philips Semiconductors
Product specication
8-channel analog
multiplexer/demultiplexer with latch
74HC/HCT4351
FEATURES
Wide analog input voltage range:
± 5 V
Low “ON” resistance:
80
(typ.) at VCC VEE = 4.5 V
70
(typ.) at VCC VEE = 6.0 V
60
(typ.) at VCC VEE = 9.0 V
Logic level translation: to enable 5 V logic to
communicate with
± 5 V analog signals
Typical “break before make” built in
Address latches provided
Output capability: non-standard
ICC category: MSI
GENERAL DESCRIPTION
The 74HC/HCT4351 are high-speed Si-gate CMOS
devices. They are specified in compliance with JEDEC
standard no. 7A.
The 74HC/HCT4351 are 8-channel analog
multiplexers/demultiplexers with three select inputs (S0 to
S2), two enable inputs (E1 and E2), a latch enable input
(LE), eight independent inputs/outputs (Y0 to Y7) and a
common input/output (Z).
With E1 LOW and E2 is HIGH, one of the eight switches is
selected (low impedance ON-state) by S0 to S2. The data
at the select inputs may be latched by using the active
LOW latch enable input (LE). When LE is HIGH the latch
is transparent. When either of the two enable inputs,
E1 (active LOW) and E2 (active HIGH), is inactive, all 8
analog switches are turned off.
VCC and GND are the supply voltage pins for the digital
control inputs (S0 to S2, LE, E1 and E2). The VCC to GND
ranges are 2.0 to 10.0 V for HC and 4.5 to 5.5 V for HCT.
The analog inputs/outputs (Y0 to Y7, and Z) can swing
between VCC as a positive limit and VEE as a negative
limit.
VCC VEE may not exceed 10.0 V.
For operation as a digital multiplexer/demultiplexer, VEE is
connected to GND (typically ground).
QUICK REFERENCE DATA
VEE = GND = 0 V; Tamb =25 °C; tr =tf = 6 ns
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
HC
HCT
tPZH / tPZL
turn “ON” time E1, E2 or Sn to Vos
CL = 15 pF; RL =1 k; VCC = 5 V
2735ns
tPHZ / tPLZ
turn “OFF” time E1, E2 or Sn to Vos
21
23
ns
CI
input capacitance
3.5
pF
CPD
power dissipation capacitance per switch
notes 1 and 2
25
pF
CS
max. switch capacitance
independent (Y)
5
pF
common (Z)
25
pF
Notes
1. CPD is used to determine the dynamic power
dissipation (PD in W):
PD =CPD × VCC2 × fi +∑ {(CL+ CS) × VCC2 × fo}
where:
fi = input frequency in MHz
fo = output frequency in MHz
CL = output load capacitance in pF
CS = max. switch capacitance in pF
∑ {(CL+ CS) × VCC2 × fo} = sum of outputs
VCC = supply voltage in V
2. For HC the condition is VI = GND to VCC
For HCT the condition is VI = GND to VCC 1.5 V
ORDERING INFORMATION
See
“74HC/HCT/HCU/HCMOS Logic Package
Information”.
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