SCBS015D − NOVEMBER 1988 − REVISED NOVEMBER 1993
Copyright 1993, Texas Instruments Incorporated
2−1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
•BiCMOS Design Substantially Reduces ICCZ
•Functionally Equivalent to ′ALS29863 and
AMD Am29863A
•Power-Up High-Impedance State
•ESD Protection Exceeds 2000 V Per
MIL-STD-883C, Method 3015
•Package Options Include Plastic
Small-Outline Packages (DW), Ceramic
Chip Carriers (FK) and Flatpacks (W), and
Standard Plastic and Ceramic 300-mil DIPs
(JT, NT)
description
These 9-bit transceivers are designed for
asynchronous 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
output-enable (OEBA and OEAB) inputs.
The outputs are in the high-impedance state
during pow er-up and power-down conditions. The
outputs remain in the high-impedance state while
the device is powered down.
The SN54BCT29863B is characterized for
operation over the full military temperature range
of −55°C to 125°C. The SN74BCT29863B is
characterized for operation from 0°C to 70°C.
FUNCTION TABLE
INPUTS
OPERATION
OEAB1 OEAB2 OEBA1 OEBA2
OPERATION
L L L L Latch A and B
L L H X
A to B
LLXH A to B
H X L L
B to A
XHLL B to A
H X H X
HXXH
Isolation
XHXH
Isolation
X H H X
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
OEBA1
A1
A2
A3
A4
A5
A6
A7
A8
A9
OEBA2
GND
VCC
B1
B2
B3
B4
B5
B6
B7
B8
B9
OEAB2
OEAB1
SN54BCT29863B . . . JT OR W PACKAGE
SN74BCT29863B . . . DW OR NT PACKAGE
(TOP VIEW)
321
13 14
5
6
7
8
9
10
11
B3
B4
B5
NC
B6
B7
B8
A3
A4
A5
NC
A6
A7
A8
4
15 16 17 18
GND
NC
OEAB1
B9
A2
A1
OEBA1
NC
SN54BCT29863B . . . FK PACKAGE
(TOP VIEW)
28 27 26 25
24
23
22
21
20
19
12
A9
B1
B2
VCC
NC − No internal connection
OEBA2
OEAB2
!"#$ % &'!!($ #% )'*+&#$ ,#$(-
!,'&$% &!" $ %)(&&#$% )(! $.( $(!"% (/#% %$!'"($%
%$#,#!, 0#!!#$1- !,'&$ )!&(%%2 ,(% $ (&(%%#!+1 &+',(
$(%$2 #++ )#!#"($(!%-
SCBS015D − NOVEMBER 1988 − REVISED NOVEMBER 1993
2−2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
logic symbol†logic diagram (positive logic)
2
A1
1
11
13
14
B1
23
3
A2 B2
22
4
A3 B3
21
5
A4 B4
20
6
A5 B5
19
7
A6 B6
18
8
A7 B7
17
9
A8 B8
16
10
A9 B9
15
OEBA1
OEBA2
OEAB1
OEAB2
&
&EN1
2
1
EN2 A1 B1
23
11 OEBA1
1
2
14
13
OEBA2
OEAB1
OEAB2
To Eight Other Channels
†This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
Pin numbers shown are for the DW, JT, NT, and W packages.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)‡
Supply voltage range, VCC −0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range (I/O ports) (see Note 1) −0.5 V to 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range (excluding I/O ports) (see Note 1) −0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage range 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: SN54BCT29863B 48 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74BCT29863B 96 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range: SN54BCT29863B −55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74BCT29863B 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 negative input voltage ratings may be exceeded if the input current rating is observed.
SCBS015D − NOVEMBER 1988 − REVISED NOVEMBER 1993
2−3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
recommended operating conditions
SN54BCT29863B SN74BCT29863B
UNIT
MIN NOM MAX MIN NOM MAX
UNIT
VCC Supply voltage 4.5 5 5.5 4.5 5 5.5 V
VIH High-level input voltage 2 2 V
VIL Low-level input voltage 0.8 0.8 V
IIK Input clamp current −18 −18 mA
IOH High-level output current −15 −24 mA
IOL Low-level output current 24 48 mA
TAOperating free-air temperature −55 125 0 70 °C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54BCT29863B SN74BCT29863B
UNIT
PARAMETER
TEST CONDITIONS
MIN TYP†MAX MIN TYP†MAX
UNIT
VIK VCC = 4.5 V, II = −18 mA −1.2 −1.2 V
VCC = 4.5 V
IOH = −15 mA 2.4 3.3 2.4 3.3
V
OH
VCC = 4.5 V IOH = −24 mA 2 3.1 V
VOH
VCC = 4.75 V, IOH = −3 mA 2.7
V
VOL
VCC = 4.5 V
IOL = 24 mA 0.35 0.5
V
VOL VCC = 4.5 V IOL = 48 mA 0.35 0.5 V
IIVCC = 5.5 V, VI = 5.5 V 0.1 0.1 mA
IIH
Control inputs
VCC = 5.5 V,
VI = 2.7 V
20 20
A
IIH A or B port‡VCC = 5.5 V, VI = 2.7 V 20 20 µA
IIL
Control inputs
VCC = 5.5 V,
VI = 0.5 V
−0.2 −0.2
mA
IIL A or B port‡VCC = 5.5 V, VI = 0.5 V −0.2 −0.2 mA
IIO(off)§VCC = 0, VO = 2.7 V 0.1 0.1 mA
IOS¶VCC = 5.5 V, VO = 0 −75 −250 −75 −250 mA
Outputs high 18 30 18 30
I
CC
V
CC
= 5.5 V Outputs low 30 45 30 45 mA
ICC
VCC = 5.5 V
Outputs disabled 6.5 12 6.5 12
mA
CiVCC = 5 V, VI = 2.5 V or 0.5 V 6 6 pF
Cio VCC = 5 V, VI = 2.5 V or 0.5 V 8 8 pF
†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.
SCBS015D − NOVEMBER 1988 − REVISED NOVEMBER 1993
2−4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
switching characteristics (see Note 2)
PARAMETER FROM
(INPUT) TO
(OUTPUT)
VCC = 5 V,
CL = 50 pF,
R1 = 500 Ω,
R2 = 500 Ω,
TA = 25°C
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
R1 = 500 Ω,
R2 = 500 Ω,
TA = MIN to MAX†UNIT
′BCT29863B SN54BCT29863B SN74BCT29863B
MIN TYP MAX MIN MAX MIN MAX
tPLH
A or B
B or A
1 3 4.5 1 5.4 1 5
ns
tPHL A or B B or A 2 4.8 6.8 2 7.9 2 7.5 ns
tPZH
OEAB or OEBA
A or B
2 5.1 7 2 9.2 2 8.4
ns
tPZL OEAB or OEBA A or B 4.5 8.4 10.8 4.5 13.6 4.5 12.6 ns
tPHZ
OEAB or OEBA
A or B
2 5 7.2 2 9.6 2 8.8
ns
tPLZ
OEAB or OEBA
A or B
1.7 4.7 6.7 1.7 9.1 1.7 8.1
ns
†For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
NOTE 2: Load circuits and voltage waveforms are shown in Section 1.
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