74HCT244 PDF даташит
Спецификация 74HCT244 изготовлена «Philips» и имеет функцию, называемую «Octal buffer/line driver; 3-state». |
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Детали детали
Номер произв | 74HCT244 |
Описание | Octal buffer/line driver; 3-state |
Производители | Philips |
логотип |
7 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
74HC/HCT244
Octal buffer/line driver; 3-state
Product specification
File under Integrated Circuits, IC06
December 1990
No Preview Available ! |
Philips Semiconductors
Octal buffer/line driver; 3-state
Product specification
74HC/HCT244
FEATURES
• Output capability: bus driver
• ICC category: MSI
GENERAL DESCRIPTION
The 74HC/HCT244 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/HCT244 are octal non-inverting buffer/line
drivers with 3-state outputs. The 3-state outputs are
controlled by the output enable inputs 1OE and 2OE.
A HIGH on nOE causes the outputs to assume a high
impedance OFF-state. The “244” is identical to the “240”
but has non-inverting outputs.
QUICK REFERENCE DATA
GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns
SYMBOL
PARAMETER
CONDITIONS
tPHL/ tPLH
CI
CPD
propagation delay
1An to 1Yn;
2An to 2Yn
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 × 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
TYPICAL
HC
9
HCT
11
UNIT
ns
3.5 3.5 pF
35 35 pF
ORDERING INFORMATION
See “74HC/HCT/HCU/HCMOS Logic Package Information”.
December 1990
2
No Preview Available ! |
Philips Semiconductors
Octal buffer/line driver; 3-state
PIN DESCRIPTION
PIN NO.
1
2, 4, 6, 8
3, 5, 7, 9
10
17, 15, 13, 11
18, 16, 14, 12
19
20
SYMBOL
1OE
1A0 to 1A3
2Y0 to 2Y3
GND
2A0 to 2A3
1Y0 to 1Y3
2OE
VCC
NAME AND FUNCTION
output enable input (active LOW)
data inputs
bus outputs
ground (0 V)
data inputs
bus outputs
output enable input (active LOW)
positive supply voltage
Product specification
74HC/HCT244
Fig.1 Pin configuration.
Fig.2 Logic symbol.
Fig.3 IEC logic symbol.
December 1990
3
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Номер в каталоге | Описание | Производители |
74HCT240 | Octal buffer/line driver; 3-state; inverting | Philips |
74HCT241 | Octal buffer/line driver; 3-state | Philips |
74HCT242 | Quad bus transceiver; 3-state; inverting | Philips |
74HCT243 | Quad bus transceiver; 3-state | Philips |
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DataSheet26.com | 2020 | Контакты | Поиск |