Page 1
74F756
Octal inverter buffer (open-collector)
74F757
Octal buffer (open-collector)
74F760
Octal buffer (open-collector)
Product specification
IC15 Data Handbook
1989 Nov 27
INTEGRATED CIRCUITS
Page 2
Philips Semiconductors Product specification
74F756/74F757/74F760
Buffers
74F756 Octal Inverter Buffer (Open Collector)
74F757 Octal Buffer (Open Collector)
74F760 Octal Buffer (Open Collector)
2
1989 Nov 27 853–0270 98220
FEA TURES
•Octal bus interface
•Open collector versions of 74F240, 74F241 and 74F244
DESCRIPTION
The 74F756, 74F757 and 74F760 are octal buffers that are ideal for
driving bus lines of buffer memory address registers. The 74F756 is
the open collector version of 74F240, 74F757 is the open collector
version of 74F241 and 74760 is the open collector version of
74F244. These devices feature two Output Enables. OE
a and OEb
(or OEb for the 74F757), each controlling four of the outputs.
TYPE
TYPICAL
PROPAGATION DELAY
TYPICAL SUPPL Y
CURRENT (TOTAL)
74F756 9.0ns 40mA
74F757 9.0ns 45mA
74F760 9.0ns 45mA
ORDERING INFORMATION
ORDER CODE
DESCRIPTION COMMERCIAL RANGE
VCC = 5V ±10%, T
amb
= 0°C to +70°C
PKG DWG #
20–pin plastic DIP N74F756N, N74F757AN, N74F760N SOT146-1
20–pin plastic SOL N74F756D, N74F757AD, N74F760D SOT163-1
INPUT AND OUTPUT LOADING AND FAN OUT TABLE
PINS DESCRIPTION
74F (U.L.)
HIGH/LOW
LOAD VALUE
HIGH/LOW
Ian, Ibn Data inputs 1.0/1.67 20µA/1.0mA
OEa, OEb Output enable input (active Low) 1.0/1.67 20µA/0.2mA
OEb Output enable input (active High 74F757) 1.0/1.67 20µA/1.0mA
Yan, Ybn Data outputs (74F757, 74F760) OC/106.7 OC/64mA
Yan, Ybn Data outputs (74F756) OC/106.7 OC/64mA
Notes:
One (1.0) FAST unit load is defined as: 20µA in the high state and 0.6mA in the Low state.
OC=Open Collector
Page 3
Philips Semiconductors Product specification
74F756/74F757/74F760Buffers
1989 Nov 27
3
PIN CONFIGURATION for 74F756
1
2
3
4
5
6
7
8
9
10 11
12
13
14
15
16
17
18
19
20
SF00320
OEa
Ia0
Yb0
Ia1
Y
b1
Ia2
Y
b2
Ia3
Yb3
GND
V
CC
OEb
Y
a0
Ib0
Y
a1
Ib1
Y
a2
Ib2
Ya3
Ib3
LOGIC SYMBOL for 74F756
VCC = Pin 20
GND = Pin 10
SF00321
119OEa
OEb
2 4 6 8 17 15 13 11
181614123579
Ia0 Ia1 Ia2 Ia3 Ib0 Ib1 Ib2 Ib3
Ya0 Ya1 Ya2 Ya3 Yb0 Yb1 Yb2 Yb3
IEC/IEEE SYMBOL for 74F756
2
4
6
8
17
15
13
11
1
19
18
16
14
12
3
5
7
9
EN1
EN2
1
2
SF01246
LOGIC DIAGRAM for 74F756
VCC = Pin 20
GND = Pin 10
SF01247
3
5
7
9
17
15
13
11
19
Y
b0
Y
b1
Y
b2
Y
b3
Y
a0
Y
a1
Y
a2
Y
a3
Ib0
Ib1
Ib2
Ib3
OE
b
18
16
14
12
2
4
6
8
1
Ia0
Ia1
Ia2
Ia3
OEb
FUNCTION TABLE for 74F756
INPUTS OUTPUTS
OEa Ia OEb Ib Ya Yb
L L L L H H
L H L H L L
H X H X H (off) H (off)
H = High voltage level
L = Low voltage level
X = Don’t care
Page 4
Philips Semiconductors Product specification
74F756/74F757/74F760Buffers
1989 Nov 27
4
PIN CONFIGURATION for 74F757
1
2
3
4
5
6
7
8
9
10 11
12
13
14
15
16
17
18
19
20 V
CC
SF01248
OEb
Ya0
Ib0
Ya1
Ib1
Ya2
Ib2
Ya3
Ib3
OE
a
Ia0
Yb0
Ia1
Yb1
Ia2
Yb2
Ia3
Yb3
GND
LOGIC SYMBOL for 74F757
OEa
OEb
1
19
V
CC
= Pin 20
GND = Pin 10
2 4 6 8 17 15 13 11
Ia0 Ia1 Ia2 Ia3 Ib0 Ib1 Ib2 Ib3
18 16 14 12 3 5 7 9
Ya0 Ya1Ya2Ya3Yb0Yb1Yb2Yb3
SF01250
IEC/IEEE SYMBOL for 74F757
1
2
SF01249
9
7
5
3
12
14
16
18
1
19
2
4
6
8
17
15
13
11
EN1
EN2
LOGIC DIAGRAM for 74F757
V
CC
= Pin 20
GND = Pin 10
2
4
6
8
1
18
16
14
12
Ia0
Ia1
Ia2
Ia3
OEa
Ya0
Ya1
Ya2
Ya3
17
15
13
11
19
3
5
7
9
Ib0
Ib1
Ib2
Ib3
OEb
Yb0
Yb1
Yb2
Yb3
SF01251
FUNCTION TABLE for 74F757
INPUTS OUTPUTS
OEa Ia OEb Ib Ya Yb
L L H L L L
L H H H H H
H X L X H (off) H (off)
H = High voltage level
L = Low voltage level
X = Don’t care
Page 5
Philips Semiconductors Product specification
74F756/74F757/74F760Buffers
1989 Nov 27
5
PIN CONFIGURATION for 74F760
1
2
3
4
5
6
7
8
9
10 11
12
13
14
15
16
17
18
19
20
V
CC
OEa
Ia0
Yb0
Ia1
Yb1
Ia2
Yb2
Ia3
Yb3
GND
OE
b
Ya0
Ib0
Ya1
Ib1
Ya2
Ib2
Ya3
Ib3
SF01252
LOGIC SYMBOL for 74F760
OEa
OEb
1
19
V
CC
= Pin 20
GND = Pin 10
2 4 6 8 17 15 13 11
Ia0 Ia1 Ia2 Ia3 Ib0 Ib1 Ib2 Ib3
18 16 14 12 3 5 7 9
Ya0 Ya1Ya2Ya3Yb0Yb1Yb2Yb3
SF01254
IEC/IEEE SYMBOL for 74F760
2
4
6
8
17
15
13
11
1
19
18
16
14
12
3
5
7
9
EN1
EN2
1
2
SF01253
LOGIC DIAGRAM for 74F760
V
CC
= Pin 20
GND = Pin 10
2
4
6
8
1
18
16
14
12
Ia0
Ia1
Ia2
Ia3
OEa
Ya0
Ya1
Ya2
Ya3
17
15
13
11
19
3
5
7
9
Ib0
Ib1
Ib2
Ib3
OE
b
Yb0
Yb1
Yb2
Yb3
SF01255
FUNCTION TABLE for 74F760
INPUTS OUTPUTS
OEa Ia OEb Ib Ya Yb
L L L L L L
L H L H H H
H X H X H (off) H (off)
H = High voltage level
L = Low voltage level
X = Don’t care
Page 6
Philips Semiconductors Product specification
74F756/74F757/74F760Buffers
1989 Nov 27
6
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limit set forth in this table may impair the useful life of the device.
Unless otherwise noted these limits are over the operating free-air temperature range.)
SYMBOL
PARAMETER RATING UNIT
V
CC
Supply voltage –0.5 to +7.0 V
V
IN
Input voltage –0.5 to +7.0 V
I
IN
Input current –30 to +5 mA
V
OUT
Voltage applied to output in High output state –0.5 to V
CC
V
I
OUT
Current applied to output in Low output state
128 mA
T
amb
Operating free-air temperature range 0 to +70 °C
T
stg
Storage temperature range –65 to +150 °C
RECOMMENDED OPERATING CONDITIONS
SYMBOL PARAMETER LIMITS UNIT
MIN NOM MAX
V
CC
Supply voltage 4.5 5.0 5.5 V
V
IH
High-level input voltage 2.0 V
V
IL
Low-level input voltage 0.8 V
I
IK
Input clamp current –18 mA
V
OH
High-level output voltage 4.5 V
I
OL
Low-level output current
64 mA
T
amb
Operating free-air temperature range 0 70 °C
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
SYMBOL
PARAMETER TEST LIMITS UNIT
CONDITIONS
1
MIN TYP2MAX
I
OH
High-level output current
VCC = MIN, VIL = MAX,
VIH = MIN, VOH = MAX
250 µA
V
OL
Low-level output voltage
VCC = MIN,
IOL = 48MAX ±10%V
CC
0.38 0.55 V
V
IL
=
MAX
,
VIH = MIN,
IOL= 64mA ±5%V
CC
0.42 0.55 V
V
IK
Input clamp voltage VCC = MIN, II = I
IK
–0.73 –1.2 V
I
I
Input current at maximum input voltage VCC = MAX, VI = 7.0V 100 µA
I
IH
High-level input current VCC = MAX, VI = 2.7V 20 µA
I
IL
Low-level input current VCC = MAX, VI = 0.5V –1.0 mA
I
CCH
20 30 mA
74F756
I
CCL
50 70 mA
pp
I
CCH
30 40 mA
ICCSupply current (total)
74F757
I
CCL
V
CC
=
MAX
55 80 mA
I
CCH
25 37 mA
74F760
I
CCL
55 80 mA
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.
2. All typical values are at V
CC
= 5V, T
amb
= 25°C.
Page 7
Philips Semiconductors Product specification
74F756/74F757/74F760Buffers
1989 Nov 27
7
AC ELECTRICAL CHARACTERISTICS
LIMITS
T
amb
= +25°C T
amb
= 0°C to +70°C
SYMBOL PARAMETER TEST VCC = +5.0V VCC = +5.0V ± 10% UNIT
CONDITION CL = 50pF, RL = 500Ω CL = 50pF, RL = 500Ω
MIN TYP MAX MIN MAX
t
PLH
t
PHL
Propagation delay
Ian, Ibn to Yn
Waveform 1, 2
8.5
1.0
11.0
3.0
14.0
6.0
8.5
1.0
15.0
6.5
ns
t
PLH
t
PHL
Propagation delay
OEn to Yn
74F756
Waveform 1, 2
9.0
5.0
11.5
7.0
14.5
10.0
9.0
4.5
15.0
10.5
ns
t
PLH
t
PHL
Propagation delay
Ian, Ibn to Yn
Waveform 1, 2
7.5
3.0
10.5
5.5
13.5
8.5
7.5
3.0
14.0
9.0
ns
t
PLH
t
PHL
Propagation delay
OE
a or OEb to Yn
74F757
Waveform 1, 2
9.0
4.5
10.5
7.0
15.0
10.0
8.5
4.0
16.0
10.5
ns
t
PLH
t
PHL
Propagation delay
Ian, Ibn to Yn
Waveform 1, 2
7.5
3.5
10.0
5.5
13.5
8.5
7.5
3.0
14.0
9.0
ns
t
PLH
t
PHL
Propagation delay
OEn to Yn
74F760
Waveform 1, 2
9.5
5.0
11.5
7.0
14.5
10.5
9.0
4.5
15.0
10.5
ns
AC WAVEFORMS
For all waveforms, VM = 1.5V .
Ian, Ibn, OEn
V
M
V
M
V
M
V
M
t
PLH
t
PHL
Yn
SF01256
Waveform 1. Propagation Delay for Inverting Outputs
Ian, Ibn,
OE
a, OEb
V
M
V
M
V
M
V
M
t
PHL
t
PLH
Yn
SF01257
Waveform 2. Propagation Delay for Non-invertIng Outputs
TYPICAL PROPAGATION DELAYS VERSUS LOAD FOR OPEN COLLECTOR OUTPUTS
0 100 200 300 400 500 600
18
16
14
12
10
8
6
4
2
0
LOAD RESISTOR ()
PROPAGATION
DELAY (ns)
t
PLH
t
PHL
SF01258
NOTE:
When using open-collector parts, the value of the pull-up resistor greatly affects the value of the t
PLH
. For example, changing the pull-up resistor
value from 500 to 100 will improve the t
PLH
up to 50% with only slight increase in the t
PHL
. However, if the pull-up resistor is changed, the
user must make certain that the total I
OL
current through the resistor and the total IIL’s of the receivers do not exceed the IOL maximum
specification.
Page 8
Philips Semiconductors Product specification
74F756/74F757/74F760Buffers
1989 Nov 27
8
TEST CIRCUIT AND WAVEFORMS
t
w
90%
V
M
10%
90%
V
M
10%
90%
V
M
10%
90%
V
M
10%
NEGATIVE
PULSE
POSITIVE
PULSE
t
w
AMP (V)
0V
0V
t
THL (tf
)
INPUT PULSE REQUIREMENTS
rep. rate
t
w
t
TLHtTHL
1MHz 500ns
2.5ns 2.5ns
Input Pulse Definition
V
CC
family
74F
D.U.T.
PULSE
GENERATOR
R
L
C
L
R
T
V
IN
V
OUT
Test Circuit for Open Collector Outputs
DEFINITIONS:
R
L
= Load resistor;
see AC electrical characteristics for value.
C
L
= Load capacitance includes jig and probe capacitance;
see AC electrical characteristics for value.
R
T
= Termination resistance should be equal to Z
OUT
of
pulse generators.
t
THL (tf
)
t
TLH (tr
)
t
TLH (tr
)
AMP (V)
amplitude
3.0V 1.5V
V
M
R
L
7.0V
SF00027
Page 9
Philips Semiconductors Product specification
74F756, 74F757,
74F760
Buffers
1989 Nov 27
9
DIP20: plastic dual in-line package; 20 leads (300 mil) SOT146-1
Page 10
Philips Semiconductors Product specification
74F756, 74F757,
74F760
Buffers
1989 Nov 27
10
SO20: plastic small outline package; 20 leads; body width 7.5 mm SOT163-1
Page 11
Philips Semiconductors Product specification
74F756, 74F757,
74F760
Buffers
1989 Nov 27
11
NOTES
Page 12
Philips Semiconductors Product specification
74F756, 74F757,
74F760
Buffers
yyyy mmm dd
12
Definitions
Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For
detailed information see the relevant data sheet or data handbook.
Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one
or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or
at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended
periods may affect device reliability.
Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips
Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or
modification.
Disclaimers
Life support — These products are not designed for use in life support appliances, devices or systems where malfunction of these products can
reasonably be expected to result in personal injury . Philips Semiconductors customers using or selling these products for use in such applications
do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application.
Right to make changes — Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard
cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no
responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless
otherwise specified.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone 800-234-7381
Copyright Philips Electronics North America Corporation 1998
All rights reserved. Printed in U.S.A.
print code Date of release: 10-98
Document order number: 9397-750-05176
Data sheet
status
Objective
specification
Preliminary
specification
Product
specification
Product
status
Development
Qualification
Production
Definition
[1]
This data sheet contains the design target or goal specifications for product development.
Specification may change in any manner without notice.
This data sheet contains preliminary data, and supplementary data will be published at a later date.
Philips Semiconductors reserves the right to make chages at any time without notice in order to
improve design and supply the best possible product.
This data sheet contains final specifications. Philips Semiconductors reserves the right to make
changes at any time without notice in order to improve design and supply the best possible product.
Data sheet status
[1] Please consult the most recently issued datasheet before initiating or completing a design.
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