TI SN74BCT29861B

SCBS009D − NOVEMBER 1988 − REVISED NOVEMBER 1993
•
•
•
•
DW OR NT PACKAGE
(TOP VIEW)
BiCMOS Design Substantially Reduces
Standby Current
Functionally Equivalent to SN74ALS29861
and AMD Am29861A
Power-Up High-Impedance State
Package Options Include Plastic
Small-Outline (DW) Packages and Standard
Plastic 300-mil DIPs (NT)
OEBA
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
GND
description
This 10-bit bus transceiver is designed for
asynchronous communication between data
buses. The control-function implementation
allows for maximum flexibility in timing.
1
24
2
23
3
22
4
21
5
20
6
19
7
18
8
17
9
16
10
15
11
14
12
13
VCC
B1
B2
B3
B4
B5
B6
B7
B8
B9
B10
OEAB
The device allows 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 output-enable (OEBA and OEAB) inputs.
The outputs are in the high-impedance state during power-up and power-down conditions. The outputs remain
in the high-impedance state while the device is powered-down.
The SN74BCT29861B is characterized for operation from 0°C to 70°C.
FUNCTION TABLE
INPUTS
OEAB
OEBA
L
H
OPERATION
A to B
H
L
B to A
H
H
Isolation
L
L
Latch A and B
(A = B)
Copyright  1993, Texas Instruments Incorporated
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1
SCBS009D − NOVEMBER 1988 − REVISED NOVEMBER 1993
logic symbol†
OEBA
OEAB
A1
1
13
2
logic diagram (positive logic)
13
1
OEAB
EN1
EN2
A1
23
1
2
23
OEBA
B1
B1
2
A2
A3
A4
A5
A6
A7
A8
A9
A10
3
22
4
21
5
20
6
19
7
18
8
17
9
16
10
15
11
14
B2
B3
B4
To Nine Other Channels
B5
B6
B7
B8
B9
B10
† This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)‡
Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Input voltage (I/O ports) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 5.5 V
Input voltage (excluding I/O ports) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Voltage applied to any output in the high state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to VCC
Input clamp current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −30 mA
Current into any output in the low state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 mA
Operating free-air temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
‡ Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: The input negative voltage rating may be exceeded if the input clamp current rating is observed.
recommended operating conditions
VCC
VIH
Supply voltage
VIL
IIK
Low-level input voltage
High-level input voltage
MIN
NOM
MAX
4.5
5
5.5
2
UNIT
V
V
0.8
V
Input clamp current
−18
mA
IOH
IOL
High-level output current
−24
mA
Low-level output current
48
mA
TA
Operating free-air temperature
70
°C
2
0
•
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
•
SCBS009D − NOVEMBER 1988 − REVISED NOVEMBER 1993
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VIK
VCC = 4.5 V,
VOH
VCC = 4.5 V
VOL
II
VCC = 4.5 V,
VCC = 5.5 V,
II = − 18 mA
IOH = − 15 mA
IOH = − 24 mA
IOL = 48 mA
2.4
3.3
2
3.1
IIH
VCC = 5.5 V,
VI = 2.7 V
IIL
Control inputs
A or B port‡
VCC = 5.5 V,
VI = 0.5 V
VCC = 0,
VCC = 5.5 V,
VO = 2.7 V
VO = 0
UNIT
−1.2
V
V
0.35
0.5
V
0.1
mA
20
70
µA
A
−0.2
−0.2
−75
Outputs high
ICC
MAX
VI = 5.5 V
Control inputs
A or B port‡
IO(off)§
IOS¶
TYP†
MIN
VCC = 5.5 V
0.1
mA
−250
mA
18
30
Outputs low
30
45
Outputs disabled
6.5
12
Ci
VCC = 5 V,
VI = 0.5 V or 2.5 V
Co
VCC = 5 V,
VI = 0.5 V or 2.5 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.
§ IO(off) = Power-off bus leakage current
¶ Not more than one output should be shorted at a time and duration of the short circuit should not exceed one second.
mA
mA
6
pF
8
pF
switching characteristics (see Note 2)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
tPLH
tPHL
A or B
B or A
tPZH
tPZL
OEAB or OEBA
A or B
tPHZ
tPLZ
OEAB or OEBA
A or B
VCC = 5 V,
CL = 50 pF,
R1 = 500 Ω,
R2 = 500 Ω,
25 C
TA = 25°C
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
R1 = 500 Ω,
R2 = 500 Ω,
TA = MIN to MAX#
MIN
MAX
MIN
TYP
MAX
1
3.2
4.6
1
5.1
1
4.6
6.2
1
6.8
2
5.2
6.8
2
8.1
2
8.3
10.1
2
11.7
2
5.3
7.1
2
7.9
2
5
6.7
2
7.7
UNIT
ns
ns
ns
# For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating condtions.
NOTE 2: Load circuits and voltage waveforms are shown in Section 1.
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POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
•
3
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