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參數(shù)資料
| 型號(hào)： | 933670170652 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類(lèi)： | 編、解碼器及復(fù)用、解復(fù)用 |
| 英文描述： | HCT SERIES, DUAL 4 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDIP16 |
| 封裝： | SOT-38-1, DIP-16 |
| 文件頁(yè)數(shù)： | 3/10頁(yè) |
| 文件大小： | 126K |
| 代理商： | 933670170652 |
December 1990
2
Philips Semiconductors
Product specication
Dual 4-input multiplexer; 3-state
74HC/HCT253
FEATURES
Non-inverting data path
3-state outputs for bus interface
and multiplex expansion
Common select inputs
Separate output enable inputs
Output capability: bus driver
ICC category: MSI
GENERAL DESCRIPTION
The 74HC/HCT253 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/HCT253 have two identical 4-input multiplexers
with 3-state outputs which select two bits from four sources
selected by common data select inputs (S0,S1).
When the individual output enable (1OE, 2OE) inputs of
the 4-input multiplexers are HIGH, the outputs are forced
to the high impedance OFF-state. The “253” is the logic
implementation of a 2-pole, 4-position switch, where the
position of the switch is determined by the logic levels
applied to S0 and S1.
The logic equations for the outputs are:
1Y=1OE(1l0.S1.S0+1I1.S1.S0+1I2.S1.S0+1I3.S1.S0)
2Y=2OE(2l0.S1.S0+2I1.S1.S0+2I2.S1.S0+2I3.S1.S0)
APPLICATIONS
Data selectors
Data multiplexers
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
CL = 15 pF; VCC = 5 V
1In, 2In to nY;
17
ns
Sn to nY
18
19
ns
CI
input capacitance
3.5
pF
CPD
power dissipation capacitance per multiplexer
notes 1 and 2
55
pF
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| 9336CMG | 制造商:Apex Tool Group 功能描述:6 IN. DIAGONAL CUTTING S J PLIERS W/CO-MOLDED GRIPS, LASER HARDENED EDGES, CDD |
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| 9336-RED | 制造商: 功能描述: 制造商:undefined 功能描述: |
| 9336SCN | 制造商:Apex Tool Group 功能描述:6 IN. DIAGONAL CUTTING SOLID JOINT PLIERS, CUSHION GRIP |
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