74HCT125 PDF даташит
Спецификация 74HCT125 изготовлена «Philips» и имеет функцию, называемую «Quad buffer/line driver 3-state». |
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Детали детали
Номер произв | 74HCT125 |
Описание | Quad buffer/line driver 3-state |
Производители | Philips |
логотип |
6 Pages
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INTEGRATED CIRCUITS
DATA SHEET
For a complete data sheet, please also download:
• The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications
• The IC06 74HC/HCT/HCU/HCMOS Logic Package Information
• The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines
www.DataSheet4U.com
74HC/HCT125
Quad buffer/line driver; 3-state
Product specification
File under Integrated Circuits, IC06
December 1990
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Philips Semiconductors
Quad buffer/line driver; 3-state
Product specification
74HC/HCT125
FEATURES
• Output capability: bus driver
• ICC category: MSI
GENERAL DESCRIPTION
The 74HC/HCT125 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/HCT125 are four non-inverting buffer/line drivers with 3-state outputs. The 3-state outputs (nY) are controlled
by the output enable input (nOE). A HIGH at nOE causes the outputs to assume a HIGH impedance OFF-state.
The “125” is identical to the “126” but has active LOW enable inputs.
www.DataShQeUeICt4KUR.cEoFmERENCE DATA
GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns
SYMBOL
PARAMETER
CONDITIONS
tPHL/ tPLH
CI
CPD
propagation delay nA to nY
input capacitance
power dissipation capacitance per buffer
CL = 15 pF; VCC = 5 V
notes 1 and 2
Notes
1. CPD is used to determine the dynamic power dissipation (PD in µW):
PD = CPD × VCC2 × fi + ∑ (CL × VCC2 × fo) where:
fi = input frequency in MHz
fo = output frequency in MHz
CL = output load capacitance in pF
VCC = supply voltage in V
∑ (CL × VCC2 × fo) = sum of outputs
2. For HC the condition is VI = GND to VCC
For HCT the condition is VI = GND to VCC − 1.5 V
TYPICAL
HC
9
3.5
22
HCT
12
3.5
24
UNIT
ns
pF
pF
ORDERING INFORMATION
See “74HC/HCT/HCU/HCMOS Logic Package Information”.
December 1990
2
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Philips Semiconductors
Quad buffer/line driver; 3-state
PIN DESCRIPTION
PIN NO.
1, 4, 10, 13
2, 5, 9, 12
3, 6, 8, 11
7
14
SYMBOL
1OE to 4OE
1A to 4A
1Y to 4Y
GND
VCC
Product specification
74HC/HCT125
NAME AND FUNCTION
outputs enable inputs (active LOW)
data inputs
data outputs
ground (0 V)
positive supply voltage
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Fig.1 Pin configuration.
Fig.2 Logic symbol.
(a) (b)
Fig.3 IEC logic symbol.
FUNCTION TABLE
INPUTS
OUTPUT
nOE
L
L
H
nA
L
H
X
nY
L
H
Z
Note
1. H = HIGH voltage level
L = LOW voltage level
X = don’t care
Z = high impedance OFF-state
Fig.4 Functional diagram.
Fig.5 Logic diagram (one buffer).
December 1990
3
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