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參數(shù)資料
| 型號： | 933713820653 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 編、解碼器及復用、解復用 |
| 英文描述： | HC/UH SERIES, OTHER DECODER/DRIVER, INVERTED OUTPUT, PDSO24 |
| 封裝： | SOT-137, SO-24 |
| 文件頁數(shù)： | 4/11頁 |
| 文件大?。?/td> | 147K |
| 代理商： | 933713820653 |
September 1993
2
Philips Semiconductors
Product specication
4-to-16 line decoder/demultiplexer
74HC/HCT154
FEATURES
16-line demultiplexing capability
Decodes 4 binary-coded inputs into one of 16 mutually
exclusive outputs
2-input enable gate for strobing or expansion
Output capability: standard
ICC category: MSI
GENERAL DESCRIPTION
The 74HC/HCT154 are high-speed Si-gate CMOS devices
and are pin compatible with low power Schottky TTL
(LSTTL). They are specified in compliance with JEDEC
standard no. 7A.
The 74HC/HCT154 decoders accept four active HIGH
binary address inputs and provide 16 mutually exclusive
active LOW outputs.
The 2-input enable gate can be used to strobe the decoder
to eliminate the normal decoding “glitches” on the outputs,
or it can be used for the expansion of the decoder.
The enable gate has two AND’ed inputs which must be
LOW to enable the outputs.
The “154” can be used as a 1-to-16 demultiplexer by using
one of the enable inputs as the multiplexed data input.
When the other enable is LOW, the addressed output will
follow the state of the applied data.
QUICK REFERENCE DATA
GND = 0 V; Tamb =25 °C; tr =tf = 6 ns
Notes
1. CPD is used to determine the dynamic power dissipation (PD in W):
PD =CPD × VCC2 × fi + ∑ (CL × VCC2 × fo) where:
fi = input frequency in MHz
fo = output frequency in MHz
∑ (CL × VCC2 × fo) = sum of outputs
CL = output load capacitance in pF
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”.
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
HC
HCT
tPHL/ tPLH
propagation delay An, En to Yn
CL = 15 pF; VCC =5 V
11
13
ns
CI
input capacitance
3.5
pF
CPD
power dissipation capacitance per package
notes 1 and 2
60
pF
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