74abt16899 NXP Semiconductors, 74abt16899 Datasheet - Page 4

• Manufacturer Part Number: 74abt16899
• Description: 18-bit Latched Transceiver With 16-bit Parity Generator/checker 3-state
• Manufacturer: NXP Semiconductors

*
Philips Semiconductors
LOGIC SYMBOL
PARITY AND ERROR FUNCTION TABLE
H = High voltage level
L = Low voltage level
t
r
1998 Feb 25
18-bit latched transceiver with 16-bit
parity generator/checker (3-State)
= Transmit–if the data path is from A B then ERRt is ERRA
= Receive–if the data path is from A B then ERRr is ERRB
Blocked if latch is not transparent
SEL
H
H
H
H
L
L
L
L
55
28
56
29
1
2
ODD/EVEN
1A0 1A1 1A2 1A3 1A4 1A5 1A6 1A7
1B0 1B1 1B2 1B3 1B4 1B5 1B6 1B7
54
LEA
LEB
SEL
ODD/EVEN
OEA
OEB
3
H
H
H
H
L
L
L
L
INPUTS
52
5
51
6
(A or B)
50
7
xPAR
H
H
H
H
L
L
L
L
49
8
47
10
46
11
Inputs
of High
Even
Even
Even
Even
Even
Even
Even
Even
Odd
Odd
Odd
Odd
Odd
Odd
Odd
Odd
45
12
1ERRA
1ERRB
1BPAR
1APAR
44
13
(B or A)
xPAR
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
14
43
OUTPUTS
4
ERRt
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
55
28
56
29
1
2
ERRr*
2B0 2B1 2B2 2B3 2B4 2B5 2B6 2B7
2A0 2A1 2A2 2A3 2A4 2A5 2A6 2A7
27
30
LEA
LEB
SEL
ODD/EVEN
OEA
OEB
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
25
32
24
33
Mode
Mode
Mode
Mode
23
34
Even
Even
Odd
Odd
35
22
37
20
PARITY MODES
38
19
Feed-through/check parity
74ABTH16899
39
18
2ERRA
2ERRB
74ABT16899
Generate parity
2BPAR
2APAR
40
17
Product specification
SH00083
16
41