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PDF 74LVC245 Data sheet ( Hoja de datos )
| Número de pieza | 74LVC245 | |
| Descripción | Octal Bidirectional Transceivers with 3-state Outputs | |
| Fabricantes | Hitachi Semiconductor | |
| Logotipo |  |
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HD74LVC245A
Octal Bidirectional Transceivers with 3-state Outputs
ADE-205-111B(Z)
3rd Edition
December 1996
Description
The HD74LVC245A has eight buffers with three state outputs in a 20 pin package. When (T / R) is high,
data flows from the A inputs to the B outputs, and when (T / R) is low, data flows from the B inputs to the
A outputs. A and B bus are separated by making enable input (OE) high level. Low voltage and high
speed operation is suitable at the battery drive product (note type personal computer) and low power
consumption extends the life of a battery for long time operation.
Features
• VCC = 2.0 V to 5.5 V
• All inputs VIH (Max.) = 5.5 V (@VCC = 0 V to 5.5 V)
• All input outputs VI/O (Max.) = 5.5 V (@VCC = 0 V or output off state)
• Typical VOL ground bounce < 0.8 V (@VCC = 3.3 V, Ta = 25°C)
• Typical VOH undershoot > 2.0 V (@VCC = 3.3 V, Ta = 25°C)
• High output current ±24 mA (@VCC = 3.0 V to 5.5 V)
Function Table
Inputs
OE T / R
LL
LH
HX
H : High level
L : Low level
X : Immaterial
Z : High impedance
Operation
B data to A bus
A data to B bus
Z
1 page  
HD74LVC245A
Switching Characteristics
Ta = –40 to 85°C
Item
Propagation delay time
Symbol VCC (V)
tPLH 2.7
tPHL 3.3±0.3
5.0±0.5
Min Typ Max
— — 8.0
1.5 — 7.0
— — 5.5
Output enable time
tZH 2.7
— — 9.5
tZL 3.3±0.3 1.5 — 8.5
5.0±0.5 — — 7.0
Output disable time
tZH 2.7
— — 8.5
tLZ 3.3±0.3 1.5 — 7.5
5.0±0.5 — — 6.5
Between outut pins skew *1 tOSLH
t OSHL
2.7 — — —
3.3±0.3 — — 1.0
5.0±0.5 — — 1.0
Input capacitance
CIN 2.7
— 3.0
Output capacitance
CO 2.7
— 15.0
Note: 1. This parameter is characterized but not tested.
tosLH = | tPLHm - tPLHn|, tosHL = | tPHLm - tPHLn|
—
—
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
pF
pF
From (Input) To (Output)
A or B
B or A
OE A or B
OE A or B
5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet 74LVC245.PDF ] | |
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