74abt16646dl NXP Semiconductors, 74abt16646dl Datasheet - Page 3

• Manufacturer Part Number: 74abt16646dl
• Description: 74abt16646; 74abth16646 16-bit Bus Transceiver/register 3-state
• Manufacturer: NXP Semiconductors

Philips Semiconductors
PIN CONFIGURATION
FUNCTION TABLE
H = High voltage level
L = Low voltage level
X = Don’t care
*
1998 Feb 27
16-bit bus transceiver/register (3-State)
= Low-to-High clock transition
nOE
H
H
X
X
L
L
L
L
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.
nDIR
X
X
X
X
H
H
L
L
1CPAB
2CPAB
1SAB
2SAB
1DIR
GND
V
GND
GND
V
GND
2DIR
1A0
1A1
1A2
1A3
1A4
1A5
1A6
1A7
2A0
2A1
2A2
2A3
2A4
2A5
2A6
2A7
CC
CC
10
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
11
1
2
3
4
5
6
7
8
9
nCPAB
H or L
H or L
INPUTS
X
X
X
X
SH00026
nCPBA
H or L
H or L
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
X
X
X
X
1OE
1CPBA
1SBA
GND
1B0
1B1
V
1B2
1B3
1B4
GND
1B5
1B6
1B7
2B0
2B1
2B2
GND
2B3
2B4
2B5
V
2B6
2B7
GND
2SBA
2CPBA
20E
CC
CC
nSAB nSBA
X
X
X
X
X
X
H
L
X
X
X
X
H
X
X
L
Unspecified
output*
Output
Input
Input
Input
nAx
3
DATA I/O
Unspecified
output*
Output
Input
Input
Input
nBx
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
OPERATING MODE
OPERATING MODE
74ABTH16646
74ABT16646
Product specification