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PDF HD74ALVCH162825 Data sheet ( Hoja de datos )
| Número de pieza | HD74ALVCH162825 | |
| Descripción | 18-bit Buffers / Drivers with 3-state Outputs | |
| Fabricantes | Hitachi Semiconductor | |
| Logotipo |  |
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HD74ALVCH162825
18-bit Buffers / Drivers with 3-state Outputs
ADE-205-187A (Z)
2nd. Edition
August 1997
Description
The HD74ALVCH162825 can be used as two 9-bit buffers or one 18-bit buffer. It provides true data. The
3-state control gate is a 2-input AND gate with active low inputs so that if either output enable (OE1 or
OE2) input is high, all nine affected outputs are in the high impedance state. Active bus hold circuitry is
provided to hold unused or floating data inputs at a valid logic level. All outputs, which are designed to
sink up to 12 mA, include 26 Ω resistors to reduce overshoot and undershoot.
Features
• VCC = 2.3 V to 3.6 V
• 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 ±12 mA (@VCC = 3.0 V)
• Bus hold on data inputs eliminates the need for external pullup / pulldown resistors
• All outputs have equivalent 26 Ω series resistors, so no external resistors are required.
Function Table
Inputs
OE1
L
L
H
X
H : High level
L : Low level
X : Immaterial
Z : High impedance
OE2
L
L
X
H
A
L
H
X
X
Output Y
L
H
Z
Z
1 page  
HD74ALVCH162825
Electrical Characteristics (Ta = –40 to 85°C)
Item
Input voltage
Symbol VCC (V) *1
VIH 2.3 to 2.7
2.7 to 3.6
Min
1.7
2.0
Max Unit Test Conditions
—V
—
VIL 2.3 to 2.7 —
2.7 to 3.6 —
0.7
0.8
Output voltage
VOH Min to Max VCC–0.2 —
V IOH = –100 µA
2.3 1.9 —
IOH = –4 mA, VIH = 1.7 V
2.3 1.7 —
IOH = –6 mA, VIH = 1.7 V
3.0 2.4 —
IOH = –6 mA, VIH = 2.0 V
2.7 2.0 —
IOH = –8 mA, VIH = 2.0 V
3.0 2.0 —
IOH = –12 mA, VIH = 2.0 V
VOL Min to Max —
0.2
IOL = 100 µA
2.3 — 0.4
IOL = 4 mA, VIL = 0.7 V
2.3 — 0.55
IOL = 6 mA, VIL = 0.7 V
3.0 — 0.55
IOL = 6 mA, VIL = 0.8 V
2.7 — 0.6
IOL = 8 mA, VIL = 0.8 V
3.0 — 0.8
IOL = 12 mA, VIL = 0.8 V
Input current
IIN 3.6
— ±5 µA VIN = VCC or GND
IIN (hold) 2.3
45 —
VIN = 0.7 V
2.3 –45 —
VIN = 1.7 V
3.0 75 —
VIN = 0.8 V
3.0 –75 —
VIN = 2.0 V
3.6 — ±500
VIN = 0 to 3.6 V
Off state output current *2 IOZ
3.6
— ±10 µA VOUT = VCC or GND
Quiescent supply current ICC
3.6
— 40 µA VIN = VCC or GND
∆ICC 3.0 to 3.6 —
750 µA VIN = one input at (VCC–0.6)
V,
other inputs at VCC or GND
Notes: 1. For conditions shown as Min or Max, use the appropriate values under recommended operating
conditions.
2. For I/O ports, the parameter IOZ includes the input leakage current.
5
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| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet HD74ALVCH162825.PDF ] | |
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