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PDF HD74ALVCH162543 Data sheet ( Hoja de datos )
| Número de pieza | HD74ALVCH162543 | |
| Descripción | 16-bit Registered Transceivers with 3-state Outputs | |
| Fabricantes | Hitachi Semiconductor | |
| Logotipo |  |
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HD74ALVCH162543
16-bit Registered Transceivers with 3-state Outputs
ADE-205-183 (Z)
Preliminary
1st. Edition
December 1996
Description
The HD74ALVCH162543 can be used as two 8-bit transceivers or one 16-bit transceiver. Separate
latch enable (LEAB or LEBA) and output enable (OEAB or OEBA) inputs are provided for each
register to permit independent control in either direction of data flow. The A to B enable (CEAB)
input must be low in order to enter data from A or to output data from B. If CEAB is low and LEAB is
low, the A to B latches are transparent; a subsequent low to high transition of LEAB puts the A latches
in the storage mode. With CEAB and OEAB both low, the 3-state B outputs are active and reflect the
data present at the output of the A latches. Data flow from B to A is similar but requires using CEBA,
LEBA, and OEBA. 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.
1 page  
Logic Diagram
1OEBA
1CEBA
1LEBA
1OEAB
1CEAB
1LEAB
1A1
56
54
55
1
3
2
5
HD74ALVCH162543
C1
1D 52 1B1
C1
1D
2OEBA
2CEBA
2LEBA
2OEAB
2CEAB
2LEAB
2A1
29
31
30
28
26
27
15
To seven other channels
C1
1D 42 2B1
C1
1D
To seven other channels
5 Page 
Package Dimensions
14.00
+0.3
–0.1
56 29
1
0.20
+0.1
–0.05
0.50 28
0.08 M
0.40 Max
0.10
HD74ALVCH162543
Unit : mm
8.10 ± 0.3
10° Max
0.50 ± 0.1
Hitachi code
EIAJ code
JEDEC code
TTP-56D
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11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet HD74ALVCH162543.PDF ] | |
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