AmZ8148
AmZ8148 is Chip Select Address Decoder manufactured by AMD.
DESCRIPTION
The Am Z8148 Address Decoder bines a three-line to eightline decoder with four qualifying enable inputs (two active HIGH and two active LOW) and the acknowledge output required for "ready" or "wait state" control of all popular MOS microprocessors.
The acknowledge output, ACK, is active LOW and responds to the bination of all enables and an acknowledge active, input mand.
The eight chip select outputs are individually active LOW in response to the bination of all enables active and the corresponding 3-bit input code at the S inputs.
The Am Z8148 is intended for chip select decoding in small, medium or large systems where multiple chip selects must be generated and address space must be allocated conservatively.
LOGIC DIAGRAM
So
1:~ ENABLE ------1
INPUTS E3 E4
CONNECTION DIAGRAM Top View
Y1 LOGIC SYMBOL
BLI-045
Note: Pin 1 is marked for orientation.
BLI-046
8-36
Am Z8148
Ao A1 Vo V1 V2 V3 V4 Vs V6 V7
BLI-047
Am Z8148
ELECTRICAL CHARACTERISTICS
The Following Conditions Apply Unless Otherwise Specified:
'L TA = O°C to +70°C
Vee = 5.0V ±5%
(MIN. = 4.75V
TA = -55°C to +125°C
Vee = 5.0V ±10%
(MIN. = 4.50V
MAX. = 5.25V) MAX. = 5.50V)
DC CHARACTERISTICS OVER OPERATING RANGE
Parameters
Description
Test Conditions (Note 1)
Typ.
Min.
(Note 2)
Max.
Units
Output HIGH...
