IDT74ALVCH16260 Просмотр технического описания (PDF) - Integrated Device Technology
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IDT74ALVCH16260
Integrated Device Technology
IDT74ALVCH16260 Datasheet PDF : 7 Pages
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IDT74ALVCH16260
3.3V CMOS 12-BIT TO 24-BIT MULTIPLEXED D-TYPE LATCH
FUNCTION TABLES (CONTINUED)(1)
A-TO-B (OEA = H)
Inputs
Outputs
Ax LEA1B LEA2B OE1B OE2B
1Bx
2Bx
H
H
H
L
L
H
H
L
H
H
L
L
L
L
H
H
L
L
L
H
2B0(2)
L
H
L
L
L
L
2B0(2)
H
L
H
L
L
1B0(2)
H
L
L
H
L
L
1B0(2)
L
X
L
L
L
L
1B0(2)
2B0(2)
X
X
X
H
H
Z
Z
X
X
X
L
H
Active
Z
X
X
X
H
L
Z
Active
X
X
X
L
L
Active Active
NOTES:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Z = High Impedance
2. Output level before the indicated steady-state input conditions were established.
INDUSTRIAL TEMPERATURE RANGE
PIN DESCRIPTION
Pin Names
Ax(1:12)
1Bx(1:12)
2Bx(1:12)
LEA1B
LEA2B
LE1B
LE2B
SEL
OEA
OE1B
OE2B
I/O
Description
I/O Bidirectional Data Port A. Usually connected to the CPU's address/data bus.(1)
I/O Bidirectional Data Port 1B. Usually connected to the even path or even bank of memory.(1)
I/O Bidirectional Data Port 2B. Usually connected to the odd path or odd bank of memory.(1)
I
Latch Enable Input for A-1B Latch. The latch is open when LEA1B is HIGH. Data from the A-port is latched on the HIGH to LOW
transition of LEA1B.
I
Latch Enable Input for A-2B Latch. The latch is open when LEA2B is HIGH. Data from the A-port is latched on the HIGH to LOW
transition of LEA2B.
I
Latch Enable Input for 1B-A Latch. The latch is open when LE1B is HIGH. Data from the A-port is latched on the HIGH to LOW
transition of LE1B.
I
Latch Enable Input for 2B-A Latch. The latch is open when LE2B is HIGH. Data from the A-port is latched on the HIGH to LOW
transition of LE2B.
I
1B or 2B Port Selection. When HIGH, SEL enables data transfer from 1B Port to A Port. When LOW, SEL enables data transfer from
2B Port to A Port.
I
Output Enable for A Port (Active LOW)
I
Output Enable for 1B Port (Active LOW)
I
Output Enable for 2B Port (Active LOW)
NOTE:
1. These pins have "Bus-Hold". All other pins are standard inputs, outputs, or I/Os.
3
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