SN54BCT760, SN74BCT760
OCTAL BUFFERS/DRIVERS
WITH OPEN-COLLECTOR OUTPUTS
SCBS034B JULY 1989 REVISED NOVEMBER 1993
Copyright
1993, Texas Instruments Incorporated
21
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Open-Collector Version of
BCT244
Open-Collector Outputs Drive Bus Lines or
Buffer Memory Address Registers
ESD Protection Exceeds 2000 V Per
MIL-STD-883C Method 3015
Packages Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK) and Flatpacks (W), and
Standard Plastic and Ceramic 300-mil DIPs
(J, N)
description
These octal buffers and line drivers are designed
specifically to improve both the performance and
density of 3-state memory address drivers, clock
drivers, and bus-oriented receivers and
transmitters.
The
BCT760 is organized as two 4-bit buffers/line
drivers with separate output-enable (OE) inputs.
When OE is low, the device passes data from the
A inputs to the Y outputs. When OE is high, the
outputs are in the high-impedance state.
The SN54BCT760 is characterized for operation
over the full military temperature range of 55
C
to 125
C. The SN74BCT760 is characterized for
operation from 0
C to 70
C.
FUNCTION TABLE
(each buffer)
INPUTS
OUTPUT
OE
A
Y
L
H
H
L
L
L
H
X
H
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
V
CC
2OE
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1
SN54BCT760 . . . J OR W PACKAGE
SN74BCT760 . . . DW OR N PACKAGE
(TOP VIEW)
3
2
1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
1Y1
2A4
1Y2
2A3
1Y3
1A2
2Y3
1A3
2Y2
1A4
SN54BCT760 . . . FK PACKAGE
(TOP VIEW)
2Y4
1A1
1OE
1Y4
2A2
2OE
2Y1
GND
2A1
V
CC
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.
SN54BCT760, SN74BCT760
OCTAL BUFFERS/DRIVERS
WITH OPEN-COLLECTOR OUTPUTS
SCBS034B JULY 1989 REVISED NOVEMBER 1993
22
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
logic symbol
logic diagram (positive logic)
1
2
4
6
8
19
11
13
15
17
3
5
7
9
12
14
16
18
1A1
1A2
1A3
1A4
1Y1
2A1
2A2
2A3
2A4
2Y1
1Y2
1Y3
1Y4
2Y2
2Y3
2Y4
2OE
1OE
2
1A1
4
1A2
6
1A3
8
1A4
EN
1
1Y1
18
1Y2
16
1Y3
14
1Y4
12
11
2A1
13
2A2
15
2A3
17
2A4
EN
19
2Y1
9
2Y2
7
2Y3
5
2Y4
3
1OE
2OE
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 range, V
CC
0.5 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, V
I
(see Note 1)
0.5 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input current range, I
I
30 mA to 5 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage range applied to any output in the disabled or power-off state, V
O
0.5 V to 5.5 V
. . . . . . . . . . . . . . .
Voltage range applied to any output in the high state, V
O
0.5 V to V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current into any output in the low state: SN54BCT760
96 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74BCT760
128 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range:
SN54BCT760
55
C to 125
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74BCT760
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 rating may be exceeded if the input clamp current rating is observed.
SN54BCT760, SN74BCT760
OCTAL BUFFERS/DRIVERS
WITH OPEN-COLLECTOR OUTPUTS
SCBS034B JULY 1989 REVISED NOVEMBER 1993
23
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
recommended operating conditions
SN54BCT760
SN74BCT760
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
VOH
High-level output voltage
5.5
5.5
V
IIK
Input clamp current
18
18
mA
IOL
Low-level output current
48
64
mA
TA
Operating free-air temperature
55
125
0
70
C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54BCT760
SN74BCT760
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
VIK
VCC = 4.5 V,
II = 18 mA
1.2
1.2
V
VOL
VCC = 4 5 V
IOL = 48 mA
0.38
0.55
V
VOL
VCC = 4.5 V
IOL = 64 mA
0.42
0.55
V
II
VCC = 5.5 V,
VI = 7 V
0.1
0.1
mA
IIH
VCC = 5.5 V,
VI = 2.7 V
20
20
A
IIL
VCC = 5.5 V,
VI = 0.5 V
1
1
mA
IOH
VCC = 4.5 V,
VOH = 5.5 V
0.1
0.1
mA
Outputs high
21
33
21
33
ICC
VCC = 5.5 V,
Outputs open
Outputs low
48
76
48
76
mA
OE disabled
6
10
6
10
Ci
VCC = 5 V,
VI = 2.5 V or 0.5 V
6
6
pF
Co
VCC = 5 V,
VI = 2.5 V or 0.5 V
10
10
pF
All typical values are at VCC = 5 V, TA = 25
C.
switching characteristics (see Note 2)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 5 V,
CL = 50 pF,
RL = 500
,
TA = 25
C
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
RL = 500
,
TA = MIN to MAX
UNIT
(INPUT)
(OUTPUT)
BCT760
SN54BCT760
SN74BCT760
MIN
TYP
MAX
MIN
MAX
MIN
MAX
tPLH
Any A
Y
6.3
8
9.5
6.3
11.1
6.3
10
ns
tPHL
Any A
Y
2.1
4.3
6.5
2.1
7.7
2.1
7.2
ns
tPLH
OE
Y
8.6
13
15.2
8.6
18.7
8.6
17.5
ns
tPHL
OE
Y
3.2
6.2
8.9
3.2
10.4
3.2
9.9
ns
For conditions shown as MIN or MAX, use the appropriate values specified under recommended operating conditions.
NOTE 2: Load circuits and voltage waveforms are shown in Section 1.
SN54BCT760, SN74BCT760
OCTAL BUFFERS/DRIVERS
WITH OPEN-COLLECTOR OUTPUTS
SCBS034B JULY 1989 REVISED NOVEMBER 1993
24
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
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Copyright
1998, Texas Instruments Incorporated
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