74lvt16646a NXP Semiconductors, 74lvt16646a Datasheet - Page 7

• Manufacturer Part Number: 74lvt16646a
• Description: 3.3v Abt 16-bit Bus Transceiver 3-state
• Manufacturer: NXP Semiconductors

Philips Semiconductors
7. Functional description
Table 4:
[1]
[2]
9397 750 14326
Product data sheet
Operating mode
Store A (B unspecified)
Store B (A unspecified)
Store A and B data
Isolation, hold storage
Real time B data to A bus
Stored B data to A bus
Real time A data to B bus
Stored A data to B bus
H = HIGH voltage level;
L = LOW voltage level;
X = don’t care;
The data output function may be enabled or disabled by various signals at the nOE input. Data input functions are always enabled, i.e.
data at the bus pins will be stored on every LOW-to-HIGH transition of the clock.
= LOW-to-HIGH clock transition.
Function table
7.1 Function table
Table 3:
Symbol
V
1B1
1B0
GND
1SBA
1CPBA
1OE
CC
[1]
Inputs
nOE nDIR nCPAB
X
X
H
H
L
L
L
L
Pin description
H
H
X
X
X
X
L
L
Pin
50
51
52
53
54
55
56
H or L
H or L
X
X
X
X
Rev. 03 — 12 January 2005
…continued
nCPBA
H or L
H or L
Description
positive supply voltage
data input or output 1; B side
data input or output 0; B side
ground (0V)
select inputs 0 to 7; B to A side
clock inputs 0 to 7; B to A side
output enable inputs 0 to 7
X
X
X
X
nSAB nSBA
H
X
X
X
X
X
X
L
H
X
X
X
X
X
X
L
Data I/O
nAx
input
unspecified
output
input
input
output
output
input
input
3.3 V 16-bit bus transceiver; 3-state
[2]
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
74LVT16646A
nBx
unspecified
output
input
input
input
input
input
output
output
[2]
reference
Figure
Figure
Figure
-
Figure
Figure
Figure
Figure
5c
5c
5c
5a
5d
5b
5d
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