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SN74ALS29861, SN74ALS29862
10 BIT BUS TRANSCEIVERS WITH 3 STATE OUTPUTS
SDAS097B − D2915, JANUARY 1986 − REVISED AUGUST 1988
•
•
•
•
Functionally Equivalent to AM29861 and
AM29862
Choice of True or Inverting Logic
Power-Up High-Impedance State
Package Options include Plastic Small
Outline Packages, Plastic Chip Carriers, and
Standard Plastic DIPs
DW OR NT PACKAGE
(TOP VIEW)
description
These 10-bit bus transceivers are designed for
asynchronous two-way communication between
data buses. The control function implementation
allows for maximum flexibility in timing.
These devices allow data transmission from the A
bus to the B bus or from the B bus to the A bus
depending upon the logic levels at the enable
inputs (GBA and GAB).
The enable inputs can be used to disable the
device so that the buses are effectively isolated.
The SN74’ family is characterized for operation
from 0°C to 70°C.
FUNCTION TABLE
INPUTS
GAB
L
H
H
L
GBA
H
L
H
L
OPERATION
ALS29861
A to B
B to A
Isolation
Latch A and B
(A = B)
ALS29862
A to B
B to A
Isolation
Latch A and B
(A = B)
GBA
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
GND
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
V
CC
B1
B2
B3
B4
B5
B6
B7
B8
B9
B10
GAB
FN PACKAGE
(TOP VIEW)
A2
A1
GBA
NC
VCC
B1
B2
A3
A4
A5
NC
A6
A7
A8
5
6
7
8
9
10
4
3 2 1 28 27 26
25
24
23
22
21
20
11
19
12 13 14 15 16 17 18
B3
B4
B5
NC
B6
B7
B8
NC − No internal connection
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
A9
A10
GND
NC
GAB
B10
B9
Copyright
1988, Texas Instruments Incorporated
1
SN74ALS29861, SN74ALS29862
10 BIT BUS TRANSCEIVERS WITH 3 STATE OUTPUTS
SDAS097B − D2915, JANUARY 1986 − REVISED AUGUST 1988
logic symbols
†
’ALS29861
GBA
GAB
A1
1
13
2
1
3
2
22
B2
A2
EN 1
EN 2
23
B1
GBA
GAB
A1
1
13
2
1
3
2
22
B2
’ALS29862
EN 1
EN 2
23
B1
A2
A3
4
21
B3
A3
4
21
B3
A4
5
20
B4
A4
5
20
B4
A5
6
19
B5
A5
6
19
B5
A6
7
18
B6
A6
7
18
B6
A7
8
17
B7
A7
8
17
B7
A8
9
16
B8
A8
9
16
B8
A9
10
15
B9
A9
10
15
B9
A10
11
14
B10
A10
11
14
B10
† These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
‡ Pin numbers shown are for DW and NT packages.
2
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
SN74ALS29861, SN74ALS29862
10 BIT BUS TRANSCEIVERS WITH 3 STATE OUTPUTS
SDAS097B − D2915, JANUARY 1986 − REVISED AUGUST 1988
logic diagrams
’ALS29861
GAB
A1
13
2
1
23
GBA
B1
GAB
A1
13
2
’ALS29862
1
23
GBA
B1
A2
3
22
B2
A2
3
22
B2
A3
4
21
B3
A3
4
21
B3
A4
5
20
B4
A4
5
20
B4
A5
6
19
B5
A5
6
19
B5
7
A6
18
B6
A6
7
18
B6
A7
8
17
B7
A7
8
17
B7
A8
9
16
B8
A8
9
16
B8
A9
10
15
B9
A9
10
15
B9
A10
11
14
B10
A10
11
14
B10
Pin numbers shown are for DW and NT packages.
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
3
SN74ALS29861, SN74ALS29862
10 BIT BUS TRANSCEIVERS WITH 3 STATE OUTPUTS
SDAS097B − D2915, JANUARY 1986 − REVISED AUGUST 1988
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Input voltage: All inputs and I/O ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V
Operating free-air temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
recommended operating conditions
MIN
VCC
VIH
VIL
IOH
IOL
TA
Supply voltage
High-level input Voltage
Low-level input Voltage
High-level output current
Low-level output current
Operating free-air temperature
0
4.75
2
0.8
−24
48
70
NOM
5
MAX
5.25
UNIT
V
V
V
mA
mA
°C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
VIK
VOH
VOL
II
Control inputs
IIH
IIL
A or B ports‡
Control inputs
A or B ports‡
IOS§
’ALS29861
ICC
’ALS29862
VCC = 5.25 V,
VCC = 5.25 V,
VCC = 5.25 V
VI = 0.4 V
VO = 0 V
−75
40
40
VCC = 5.25 V,
VI = 2.7 V
TEST CONDITIONS
VCC = 4.75 V,
VCC = 4.75 V,
VCC = 4.75 V,
VCC = 4.75 V,
VCC = 5.25 V,
II = − 18 mA
IOH = − 15 mA
IOH = − 24 mA
IOL = 48 mA
VI = 5.5 V
MIN
TYP
†
MAX
−1.2
2.4
2
0.35
0.5
0.1
20
20
−0.1
−0.1
−250
65
65
mA
mA
mA
V
V
mA
µA
A
UNIT
V
† All typical values are at VCC = 5 V, TA = 25°C
‡ For I/O ports, the parameters IIH and IIL include the off-state output current.
§ Not more than one output should be shorted at a time and duration of the short circuit should not exceed one second.
4
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
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