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INTEGRATED CIRCUITS
74F756 Octal inverter buffer (open-collector) 74F757 Octal buffer (open-collector) 74F760 Octal buffer (open-collector)
Product specification IC15 Data Handbook 1989 Nov 27
Philips Semiconductors
Philips Semiconductors
Product specification
Buffers
74F756 Octal Inverter Buffer (Open Collector) 74F757 Octal Buffer (Open Collector) 74F760 Octal Buffer (Open Collector)
FEATURES
74F756/74F757/74F760
* 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. OEa and OEb (or OEb for the 74F757), each controlling four of the outputs.
TYPE 74F756 74F757 74F760
TYPICAL PROPAGATION DELAY 9.0ns 9.0ns 9.0ns
TYPICAL SUPPLY CURRENT (TOTAL) 40mA 45mA 45mA
ORDERING INFORMATION
ORDER CODE DESCRIPTION 20-pin plastic DIP 20-pin plastic SOL COMMERCIAL RANGE VCC = 5V 10%, Tamb = 0C to +70C N74F756N, N74F757AN, N74F760N N74F756D, N74F757AD, N74F760D PKG DWG # SOT146-1 SOT163-1
INPUT AND OUTPUT LOADING AND FAN OUT TABLE
PINS Ian, Ibn OEa, OEb OEb Yan, Ybn Yan, Ybn Data inputs Output enable input (active Low) Output enable input (active High 74F757) Data outputs (74F757, 74F760) Data outputs (74F756) DESCRIPTION 74F (U.L.) HIGH/LOW 1.0/1.67 1.0/1.67 1.0/1.67 OC/106.7 OC/106.7 LOAD VALUE HIGH/LOW 20A/1.0mA 20A/0.2mA 20A/1.0mA OC/64mA OC/64mA
Notes: One (1.0) FAST unit load is defined as: 20A in the high state and 0.6mA in the Low state. OC=Open Collector
1989 Nov 27
2
853-0270 98220
Philips Semiconductors
Product specification
Buffers
74F756/74F757/74F760
PIN CONFIGURATION for 74F756
OEa Ia0 Yb0 Ia1 Yb1 Ia2 Yb2 Ia3 Yb3 1 2 3 4 5 6 7 8 9 20 VCC 19 OEb 18 Ya0
IEC/IEEE SYMBOL for 74F756
1 19 EN1 EN2 18 16 14 12 2 3 5 7 9
2 17 Ib0 4 16 Ya1 15 Ib1 14 Ya2 13 Ib2 12 Ya3 11 Ib3 6 8 17 15 13 11
1
GND 10
SF00320
SF01246
LOGIC SYMBOL for 74F756
2 4 6 8 17 15 13 11
LOGIC DIAGRAM for 74F756
Ia0 2 18 Ya0 Ib0 17 3 Yb0
Ia0 1 19 OEa
Ia1
Ia2
Ia3
Ib0
Ib1
Ib2 Ib3
Ia1
4
16
Ya1
Ib1
15
5
Yb1
Ia2 OEb Ya0 Ya1 Ya2 Ya3 Yb0 Yb1 Yb2 Yb3 Ia3
6
14
Ya2
Ib2
13
7
Yb2
8
12
Ya3
Ib3
11
9
Yb3
18 VCC = Pin 20 GND = Pin 10
16
14
12
3
5
7
9
OEb
1
OEb
19
SF00321
VCC = Pin 20 GND = Pin 10
SF01247
FUNCTION TABLE for 74F756
INPUTS OEa L L H Ia L H X OEb L L H Ib L H X OUTPUTS Ya H L H (off) Yb H L H (off)
H = High voltage level L = Low voltage level X = Don't care
1989 Nov 27
3
Philips Semiconductors
Product specification
Buffers
74F756/74F757/74F760
PIN CONFIGURATION for 74F757
OEa 1 Ia0 2 Yb0 3 Ia1 4 Yb1 5 Ia2 6 Yb2 7 Ia3 8 Yb3 9 GND 10 20 VCC 19 OEb 18 Ya0 17 Ib0 16 Ya1
LOGIC DIAGRAM for 74F757
Ia0 2 18 Ya0 Ib0 17 3 Yb0
Ia1
4
16
Ya1
Ib1
15
5
Yb1
Ia2 15 Ib1 14 Ya2 Ia3 13 Ib2 12 Ya3 11 Ib3 OEa
6
14 Ya2 12 Ya3
Ib2
13
7 Yb2 9 Yb3
8
Ib3
11
1
OEb
19
SF01248
VCC = Pin 20 GND = Pin 10
SF01251
LOGIC SYMBOL for 74F757
2 4 6 8 17 15 13 11
FUNCTION TABLE for 74F757
INPUTS OEa Ia L H X OEb H H L Ib L H X OUTPUTS Ya L H H (off) Yb L H H (off)
Ia0 Ia1 Ia2 Ia3 Ib0 Ib1 Ib2 Ib3 1 19 OEa OEb Ya0 Ya1 Ya2 Ya3 Yb0 Yb1 Yb2 Yb3
L L H
H = High voltage level L = Low voltage level X = Don't care
18 16 14 12 VCC = Pin 20 GND = Pin 10
3
5
7
9
SF01250
IEC/IEEE SYMBOL for 74F757
1 19 EN1 EN2 18 16 14 12 2 3 5 7 9
2 4 6 8 17 15 13 11
1
SF01249
1989 Nov 27
4
Philips Semiconductors
Product specification
Buffers
74F756/74F757/74F760
PIN CONFIGURATION for 74F760
OEa 1 Ia0 2 Yb0 3 Ia1 4 Yb1 5 Ia2 6 Yb2 7 Ia3 8 Yb3 9 GND 10 20 VCC 19 OEb 18 Ya0 17 Ib0 16 Ya1 15 Ib1 14 Ya2 13 Ib2 12 Ya3 11 Ib3
IEC/IEEE SYMBOL for 74F760
1 19 EN1 EN2 18 16 14 12 2 3 5 7 9
2 4 6 8 17 15 13 11
1
SF01252
SF01253
LOGIC SYMBOL for 74F760
2 4 6 8 17 15 13 11
LOGIC DIAGRAM for 74F760
Ia0 2 18 Ya0 Ib0 17 3 Yb0
Ia0 Ia1 Ia2 Ia3 Ib0 Ib1 Ib2 Ib3 1 19 OEa OEb Ya0 Ya1 Ya2 Ya3 Yb0 Yb1 Yb2 Yb3
Ia1
4
16
Ya1
Ib1
15
5
Yb1
Ia2
6
14 Ya2 12 Ya3
Ib2
13
7 Yb2 9 Yb3
Ia3
8
Ib3
11
18 16 14 12 VCC = Pin 20 GND = Pin 10
3
5
7
9
OEa
1
OEb
19
SF01254
VCC = Pin 20 GND = Pin 10
SF01255
FUNCTION TABLE for 74F760
INPUTS OEa L L H Ia L H X OEb L L H Ib L H X OUTPUTS Ya L H H (off) Yb L H H (off)
H = High voltage level L = Low voltage level X = Don't care
1989 Nov 27
5
Philips Semiconductors
Product specification
Buffers
74F756/74F757/74F760
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 VCC VIN IIN VOUT IOUT Tamb Tstg Supply voltage Input voltage Input current Voltage applied to output in High output state Current applied to output in Low output state Operating free-air temperature range Storage temperature range PARAMETER RATING -0.5 to +7.0 -0.5 to +7.0 -30 to +5 -0.5 to VCC 128 0 to +70 -65 to +150 UNIT V V mA V mA C C
RECOMMENDED OPERATING CONDITIONS
SYMBOL PARAMETER MIN VCC VIH VIL IIK VOH IOL Tamb Supply voltage High-level input voltage Low-level input voltage Input clamp current High-level output voltage Low-level output current Operating free-air temperature range 0 4.5 2.0 0.8 -18 4.5 64 70 LIMITS NOM 5.0 MAX 5.5 V V V mA V mA C UNIT
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.) SYMBOL PARAMETER TEST CONDITIONS1 IOH VOL High-level output current Low-level output voltage VCC = MIN, VIL = MAX, VIH = MIN, VOH = MAX VCC = MIN, VIL = MAX MAX, VIH = MIN, IOL = 48MAX IOL= 64mA 10%VCC 5%VCC 0.38 0.42 -0.73 MIN LIMITS TYP2 MAX 250 0.55 0.55 -1.2 100 20 -1.0 20 50 VCC = MAX 30 55 25 30 70 40 80 37 A V V V A A mA mA mA mA mA mA UNIT
VIK II IIH IIL
Input clamp voltage Input current at maximum input voltage High-level input current Low-level input current 74F756 ICCH ICCL
VCC = MIN, II = IIK VCC = MAX, VI = 7.0V VCC = MAX, VI = 2.7V VCC = MAX, VI = 0.5V
ICC
Supply current (total)
74F757
ICCH ICCL
74F760
ICCH
ICCL 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 VCC = 5V, Tamb = 25C.
1989 Nov 27
6
Philips Semiconductors
Product specification
Buffers
74F756/74F757/74F760
AC ELECTRICAL CHARACTERISTICS
LIMITS Tamb = +25C Tamb = 0C to +70C VCC = +5.0V VCC = +5.0V 10% CL = 50pF, RL = 500 CL = 50pF, RL = 500 MIN TYP MAX MIN MAX 8.5 11.0 14.0 8.5 15.0 1.0 3.0 6.0 1.0 6.5 9.0 5.0 7.5 3.0 9.0 4.5 7.5 3.5 9.5 5.0 11.5 7.0 10.5 5.5 10.5 7.0 10.0 5.5 11.5 7.0 14.5 10.0 13.5 8.5 15.0 10.0 13.5 8.5 14.5 10.5 9.0 4.5 7.5 3.0 8.5 4.0 7.5 3.0 9.0 4.5 15.0 10.5 14.0 9.0 16.0 10.5 14.0 9.0 15.0 10.5
SYMBOL
PARAMETER
TEST CONDITION
UNIT
tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL
Propagation delay Ian, Ibn to Yn Propagation delay OEn to Yn Propagation delay Ian, Ibn to Yn Propagation delay OEa or OEb to Yn Propagation delay Ian, Ibn to Yn Propagation delay OEn to Yn
Waveform 1, 2 74F756 Waveform 1, 2 Waveform 1, 2 74F757 Waveform 1, 2 Waveform 1, 2 74F760 Waveform 1, 2
ns ns ns ns ns ns
AC WAVEFORMS
For all waveforms, VM = 1.5V.
Ian, Ibn, OEn VM tPHL Yn VM VM tPLH Ian, Ibn, OEa, OEb VM tPLH Yn VM VM tPHL
VM
VM
SF01256
SF01257
Waveform 2. Propagation Delay for Non-invertIng Outputs Waveform 1. Propagation Delay for Inverting Outputs
TYPICAL PROPAGATION DELAYS VERSUS LOAD FOR OPEN COLLECTOR OUTPUTS
18 16
14 tPLH 12
10 PROPAGATION DELAY (ns) 8 tPHL
6
4
2
0 0 100 200 300 400 500 600 LOAD RESISTOR (W)
SF01258
NOTE: When using open-collector parts, the value of the pull-up resistor greatly affects the value of the tPLH. For example, changing the pull-up resistor value from 500W to 100W will improve the tPLH up to 50% with only slight increase in the tPHL. However, if the pull-up resistor is changed, the user must make certain that the total IOL current through the resistor and the total IIL's of the receivers do not exceed the IOL maximum specification.
1989 Nov 27
7
Philips Semiconductors
Product specification
Buffers
74F756/74F757/74F760
TEST CIRCUIT AND WAVEFORMS
VCC 7.0V 90% VIN PULSE GENERATOR RT D.U.T. VOUT RL NEGATIVE PULSE VM 10% tTHL (tf ) CL RL tTLH (tr ) 90% POSITIVE PULSE 10% tTHL (tf ) AMP (V) 90% VM tw 10% 0V tw VM 10% tTLH (tr ) 0V 90% AMP (V)
Test Circuit for Open Collector Outputs
VM
DEFINITIONS: RL = Load resistor; see AC electrical characteristics for value. CL = Load capacitance includes jig and probe capacitance; see AC electrical characteristics for value. RT = Termination resistance should be equal to ZOUT of pulse generators.
Input Pulse Definition INPUT PULSE REQUIREMENTS family amplitude VM 74F 3.0V 1.5V rep. rate 1MHz tw 500ns tTLH 2.5ns tTHL 2.5ns
SF00027
1989 Nov 27
8
Philips Semiconductors
Product specification
Buffers
74F756, 74F757, 74F760
DIP20: plastic dual in-line package; 20 leads (300 mil)
SOT146-1
1989 Nov 27
9
Philips Semiconductors
Product specification
Buffers
74F756, 74F757, 74F760
SO20: plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
1989 Nov 27
10
Philips Semiconductors
Product specification
Buffers
74F756, 74F757, 74F760
NOTES
1989 Nov 27
11
Philips Semiconductors
Product specification
Buffers
74F756, 74F757, 74F760
Data sheet status
Data sheet status Objective specification Preliminary specification Product specification Product status Development Qualification 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.
Production
[1] Please consult the most recently issued datasheet before initiating or completing a design.
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 (c) Copyright Philips Electronics North America Corporation 1998 All rights reserved. Printed in U.S.A. print code Document order number: Date of release: 10-98 9397-750-05176
Philips Semiconductors
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