74ALVCH16646 View Datasheet(PDF) - Philips Electronics
Part Name
Description
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74ALVCH16646 Datasheet PDF : 12 Pages
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Philips Semiconductors
16-bit bus transceiver/register (3-State)
Product specification
74ALVCH16646
LOGIC DIAGRAM (one section)
OE
DIR
SBA
CPBA
SAB
CPAB
VCC
An
S
Y D1
MUX
D2
QD
FFn
CP
8 IDENTICAL CHANNELS
DQ
FFn
CP
S
D1 Y
MUX
D2
VCC
Bn
SY00012
FUNCTION TABLE
nOE
X
X
nDIR
X
X
INPUTS
nCPAB
↑
X
nCPBA
X
↑
nSAB
X
X
nSBA
X
X
DATA I/O *
nAx
nBx
input
un*
un*
input
FUNCTION
store A, B unspecified*
store B, A unspecified*
H
X
↑
↑
X
H
X
H or L H or L X
X
X
input
input
store A and B data, isolation
hold storage
L
L
L
L
X
X
X
X
H or L X
L
H
output
input
real-time B data to A bus
stored B data to A bus
L
H
X
X
L
H
H or L X
L
H
X
X
input
output
real-time A data to B bus
stored A data to B bus
* The data output functions may be enabled or disabled by various signals at the OE and DIR inputs. Data input functions are always enabled,
i.e., data at the bus inputs will be stored on every LOW-to-HIGH transition on the clock inputs.
un = unspecified
H = HIGH voltage level
L = LOW voltage level
X = don’t care
↑ = LOW-to-HIGH level transition
1998 Sep 03
4
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