SN74BCT756
OCTAL BUFFER/DRIVER
WITH OPEN-COLLECTOR OUTPUTS
SCBS056B – OCTOBER 1990 – REVISED JULY 1997
D
D
DW OR N PACKAGE
(TOP VIEW)
BiCMOS Design Significantly Reduces ICCZ
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
Open-Collector Outputs Drive Bus Lines or
Buffer Memory Address Registers
Package Options Include Plastic
Small-Outline Packages (DW) and Standard
Plastic 300-mil DIPs (N)
D
D
1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
description
This octal buffer and line driver is designed
specifically to improve both the performance and
density of 3-state memory address drivers, clock
drivers, and bus-oriented receivers and
transmitters. The SN74BCT756, SN74BCT757,
and SN74BCT760 provide the choice of selected
combinations of inverting outputs, symmetrical
output-enable (OE) inputs, and complementary
OE and OE inputs.
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
VCC
2OE
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1
The SN74BCT756 is characterized for operation
from 0°C to 70°C.
FUNCTION TABLE
INPUTS
OE
A
OUTPUT
Y
H
X
H
L
L
H
L
H
L
logic symbol†
1OE
1A1
1A2
1A3
1A4
1
EN
2OE
2
18
4
16
6
14
8
12
1Y1
2A1
1Y2
2A2
1Y3
1Y4
2A3
2A4
19
EN
11
9
13
7
15
5
17
3
2Y1
2Y2
2Y3
2Y4
† This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 1997, Texas Instruments Incorporated
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
1
SN74BCT756
OCTAL BUFFER/DRIVER
WITH OPEN-COLLECTOR OUTPUTS
SCBS056B – OCTOBER 1990 – REVISED JULY 1997
logic diagram (positive logic)
1OE
1A1
1A2
1A3
1A4
1
2OE
18
2
16
4
14
6
12
8
1Y1
1Y2
1Y3
1Y4
2A1
2A2
2A3
19
9
11
7
13
5
15
3
17
2A4
2Y1
2Y2
2Y3
2Y4
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, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V
Input current range, II . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30 mA to 5 mA
Voltage range applied to any output in the disabled or power-off state, VO . . . . . . . . . . . . . . . . –0.5 V to 5.5 V
Voltage range applied to any output in the high state, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to VCC
Current into any output in the low state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA
Package thermal impedance, θJA (see Note 1): DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/W
N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67°C/W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –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 package thermal impedance is calculated in accordance with JESD 51.
recommended operating conditions
2
MIN
NOM
MAX
4.5
5
5.5
UNIT
VCC
VIH
Supply voltage
VIL
VOH
Low-level input voltage
High-level output voltage
5.5
V
IIK
IOL
Input clamp current
–18
mA
64
mA
TA
Operating free-air temperature
70
°C
High-level input voltage
2
V
0.8
Low-level output current
0
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
V
V
SN74BCT756
OCTAL BUFFER/DRIVER
WITH OPEN-COLLECTOR OUTPUTS
SCBS056B – OCTOBER 1990 – REVISED JULY 1997
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VIK
IOH
VCC = 4.5 V,
VCC = 4.5 V,
II = –18 mA
VOH = 5.5 V
VOL
II
VCC = 4.5 V,
VCC = 5.5 V,
IOL = 64 mA
VI = 7 V
IIH
IIL
VCC = 5.5 V,
VCC = 5.5 V,
VI = 2.7 V
VI = 0.5 V
ICC
VCC = 5.5 V,
Outputs open
Ci
Co
VCC = 5 V,
VCC = 5 V,
MIN
TYP†
0.42
MAX
UNIT
–1.2
V
0.1
mA
0.55
V
0.1
mA
20
µA
–1
mA
Outputs high
21
33
Outputs low
55
86
OE disable
6
10
VI = 2.5 V or 0.5 V
VI = 2.5 V or 0.5 V
mA
6
pF
10
pF
† All typical values are at VCC = 5 V, TA = 25°C.
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, CL = 50 pF (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
tPLH
tPHL
A
Y
tPLH
tPHL
OE
Y
VCC = 5 V,
CL = 50 pF,
R1 = 500 Ω,
R2 = 500 Ω,
TA = 25°C
MIN
TYP
MAX
VCC = 4.5 to 5.5 V,
CL = 50 pF,
R1 = 500 Ω,
R2 = 500 Ω,
TA = MIN to MAX‡
MIN
MAX
6.2
8.5
10.5
6.2
11.3
0.5
2
4.1
0.5
4.2
8.2
12.5
14.8
8.2
16.5
3.4
6.8
9.2
3.4
10.3
UNIT
ns
ns
‡ For conditions as MIN or MAX, use the appropriate value specified under recommended operating conditions.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
3
SN74BCT756
OCTAL BUFFER/DRIVER
WITH OPEN-COLLECTOR OUTPUTS
SCBS056B – OCTOBER 1990 – REVISED JULY 1997
PARAMETER MEASUREMENT INFORMATION
7V
(tPZL, tPLZ, O.C.)
S1
Open
(all others)
R1
Test
Point
From Output
Under Test
CL
(see Note A)
R2
RL = R1 = R2
LOAD CIRCUIT
3V
1.5 V
Timing Input
0V
1.5 V
tw
3V
1.5 V
1.5 V
0V
3V
Low-Level
Pulse
1.5 V
VOLTAGE WAVEFORMS
PULSE DURATION
3V
1.5 V
1.5 V
0V
1.5 V
1.5 V
VOL
Out-of-Phase
Output
tPLZ
3.5 V
1.5 V
tPHZ
tPZH
VOH
1.5 V
1.5 V
VOL
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
1.5 V
0V
Output
Waveform 1
(see Note B)
tPLH
tPHL
3V
1.5 V
tPZL
VOH
In-Phase
Output
Output
Control
(low-level
enable)
tPHL
tPLH
1.5 V
0V
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
Input
1.5 V
0V
th
tsu
Data Input
3V
High-Level
Pulse
Output
Waveform 2
(see Note B)
VOL
0.3 V
0.3 V
VOH
1.5 V
0V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS
NOTES: A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, tr = tf ≤ 2.5 ns, duty cycle = 50%.
D. The outputs are measured one at a time with one input transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms
4
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
PACKAGE OPTION ADDENDUM
www.ti.com
10-Dec-2020
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
(4/5)
(6)
SN74BCT756DW
ACTIVE
SOIC
DW
20
25
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
BCT756
SN74BCT756N
ACTIVE
PDIP
N
20
20
RoHS &
Non-Green
NIPDAU
N / A for Pkg Type
0 to 70
SN74BCT756N
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of