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INTEGRATED CIRCUITS
74F655A* Octal buffer/driver with parity, inverting (3-State) 74F656A Octal buffer/driver with parity, non-inverting (3-State)
* Discontinued part. Please see the Discontinued Product List.
Product specification IC15 Data Handbook
1991 Jul 17
Philips Semiconductors
Philips Semiconductors
Product specification
Buffers/drivers
74F655A Octal buffer/driver with parity, inverting (3-State) 74F656A Octal buffer/driver with parity, non-inverting (3-State)
FEATURES
74F655A* 74F656A
* Significantly improved AC performance over 74F655 and 74F656 * High impedance NPN base input for reduced loading
(40A in High and Low states)
DESCRIPTION
The 74F655A and 74F656A are octal buffers and line drivers with parity generation/checking designed to be employed as memory address drivers, clock drivers and bus-oriented transmitters/receivers. These parts include parity generator/checker to improve PC board density. TYPICAL PROPAGATION DELAY 6.5ns 6.5ns
* Ideal in applications where high output drive and light bus loading * 74F655A combines 74F240 and 74F280A functions in one
package are required (IIL is 40A vs. FAST std of 600A)
TYPE 74F655A 74F656A
TYPICAL SUPPLY CURRENT (TOTAL) 64mA 64mA
* 74F656A combines 74F244 and 74F280A functions in one
package
* 74F655A Inverting * 74F656A Non-inverting * 3-State outputs sink 64mA and source 15mA * 24-pin plastic Slim DIP (300mil) package * Inputs on one side and outputs on the other side simplifies PC
board layout
* Combined functions reduce part count and enhance system
performance
* Industrial temperature range available (-40C to +85C)
ORDERING INFORMATION
DESCRIPTION 24-pin Plastic Slim DIP (300mil) 24-pin Plastic SOL COMMERCIAL RANGE VCC = 5V 10%, Tamb = 0C to +70C N74F656AN N74F656AD INDUSTRIAL RANGE VCC = 5V 10%, Tamb = -40C to +85C I74F656AN I74F656AD PKG DWG # SOT222-1 SOT137-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS D0-D7 PI OE0, OE1, OE2 E, O Q0-Q7 Q0-Q7 Data inputs Parity input Output Enable Inputs (active Low) Parity outputs Data outputs (74F655A) Data outputs (74F656A) DESCRIPTION 74F(U.L.) HIGH/LOW 2.0/0.066 1.0/0.033 1.0/0.033 750/106.7 750/106.7 750/106.7 LOAD VALUE HIGH/LOW 40A/40A 20A/20A 20A/20A 15mA/64mA 15mA/64mA 15mA/64mA
NOTE: One (1.0) FAST Unit Load (U.L.) is defined as: 20A in the High state and 0.6mA in the Low state.
* Discontinued part. Please see the Discontinued Products List. 1991 Jul 17
2
853-0383 03305
Philips Semiconductors
Product specification
Buffers/drivers
74F655A* 74F656A
PIN CONFIGURATION - 74F655A
OE0 OE1 PI D0 D1 D2 D3 D4 D5 D6 D7 GND 1 2 3 4 5 6 7 8 9 10 11 12 24 VCC 23 OE2 22 O 21 E 20 Q0 19 Q1 18 Q2 17 Q3 16 Q4 15 Q5 14 Q6 13 Q7
PIN CONFIGURATION - 74F656A
OE0 OE1 PI D0 D1 D2 D3 D4 D5 D6 D7 GND 1 2 3 4 5 6 7 8 9 10 11 12 24 VCC 23 OE2 22 O 21 E 20 Q0 19 Q1 18 Q2 17 Q3 16 Q4 15 Q5 14 Q6 13 Q7
SF01168
SF01169
LOGIC SYMBOL - 74F655A
4 D0 3 1 2 23 PI OE0 OE1 OE2 Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 E O 21 22 5 D1 6 D2 7 D3 8 D4 9 D5 10 D6 11 D7
LOGIC SYMBOL - 74F656A
4 5 6 7 8 9 10 11
D0 3 1 2 23 PI OE0 OE1 OE2 Q0
D1
D2
D3
D4
D5
D6
D7
E O
21 22
Q1
Q2
Q3
Q4
Q5
Q6
Q7
VCC=Pin 24 GND=Pin 12
20
19
18
17
16
15
14
13
SF01170
VCC=Pin 24 GND=Pin 12
20
19
18
17
16
15
14
13
SF01171
IEEE/IEC SYMBOL - 74F655A
2K 3,5,6,7,8 9,10,11,12 3 1 2 23 4 5 6 7 8 9 10 11 P3 1 EN4 3,5,6,7,8 9,10,11,12 [EVEN] [ODD] 21 22
LOGIC SYMBOL (IEEE/IEC) - 74F656A
2K 3,5,6,7,8 9,10,11,12 3 1 2 23 20 19 18 17 16 15 14 13 4 Z5 5 6 7 8 9 10 11 Z6 Z7 Z8 Z9 Z10 Z11 Z12 4 19 18 17 16 15 14 13 P3 1 EN4 3,5,6,7,8 9,10,11,12 [EVEN] [ODD] 21 22
Z5 Z6 Z7 Z8 Z9 Z10 Z11 Z12
4
20
SF01172
SF01173
* Discontinued part. Please see the Discontinued Products List.
1991 Jul 17 3
Philips Semiconductors
Product specification
Buffers/drivers
74F655A* 74F656A
LOGIC DIAGRAM - 74F655A
3
PI
21
E
22
O
D0
4
20
Q0
D1
5
19
Q1
D2
6
18
Q2
D3
7
17
Q3
D4
8
16
Q4
D5
9
15
Q5
D6
10
14
Q6
D7
11
13
Q7
OE0 OE1 OE2
1 2 23
VCC = Pin 24 GND = Pin 12
SF01174
* Discontinued part. Please see the Discontinued Products List.
1991 Jul 17 4
Philips Semiconductors
Product specification
Buffers/drivers
74F655A* 74F656A
LOGIC DIAGRAM - 74F656A
3
PI
21
E
22
O
D0
4
20
Q0
D1
5
19
Q1
D2
6
18
Q2
D3
7
17
Q3
D4
8
16
Q4
D5
9
15
Q5
D6
10
14
Q6
D7
11
13
Q7
OE0 OE1 OE2
1 23 2
VCC = Pin 24 GND = Pin 12
SF01175
* Discontinued part. Please see the Discontinued Products List.
1991 Jul 17 5
Philips Semiconductors
Product specification
Buffers/drivers
74F655A* 74F656A
FUNCTION TABLE
INPUTS OE0 L L H X X H L X Z = = = = OE1 L L X H X OE2 L L X X H Dn L H X X X OUTPUTS 74F655A Qn H L Z Z Z 74F656A Qn L H Z Z Z
FUNCTION TABLE for PARITY OUTPUTS
INPUTS Number of inputs, High (PI, D0-D7) Even - 0, 2, 4, 6, 8 Odd - 1, 3, 5, 7, 9 Any OEn = High H = High voltage level L = Low voltage level Z = High impedance "off" state E H L Z PARITY OUTPUTS 0 L H Z
High voltage level Low voltage level Don't care High impedance "off" state
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limits 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 Commercial range Operating free-air temperature range free air Industrial range Storage temperature range -40 to +85 -65 to +150 PARAMETER RATING -0.5 to +7.0 -0.5 to +7.0 -30 to +5 -0.5 to +VCC 128 0 to +70 UNIT V V mA V mA C C C
RECOMMENDED OPERATING CONDITIONS
LIMITS SYMBOL VCC VIH VIL IIK IOH IOL Tamb Supply voltage High-level input voltage Low-level input voltage Input clamp current High-level output current Low-level output current Commercial range Operating free-air temperature range free air Industrial range 0 -40 PARAMETER MIN 4.5 2.0 0.8 -18 -15 64 70 85 NOM 5.0 MAX 5.5 V V V mA mA mA C C UNIT
* Discontinued part. Please see the Discontinued Products List.
1991 Jul 17 6
Philips Semiconductors
Product specification
Buffers/drivers
74F655A* 74F656A
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.) LIMITS SYMBOL PARAMETER TEST CONDITIONSNO TAG 10%VCC 5%VCC 10%VCC 10%VCC 5%VCC 0.42 -0.73 MIN 2.4 2.7 2.0 0.55 0.55 -1.2 100 40 20 VCC = MAX, VI = 2 7V MAX 2.7V 80 40 VCC = MAX, VI = 0 5V MAX 0.5V VCC = MAX, VO = 2.7V VCC = MAX, VO = 0.5V VCC = MAX VCC = MAX -100 50 78 -40 -20 50 -50 -225 80 110 3.3 TYP
NO TAG
UNIT MAX V V V V V V A A A A A A A A A mA mA mA
VOH
High-level output voltage
VCC = MIN MIN, VIL = MAX VIH = MIN VCC = MIN, VIL = MAX VIH = MIN
IO = -3mA 3mA OH IOH = -15mA IO = 64mA OL VCC = MIN, II = IIK
VO OL VIK II
Low-level Low level output voltage Input clamp voltage Input current at maximum input voltage Commercial range Dn Pl, OEn Dn Pl, OEn Dn Pl, OEn Off-state current High-level voltage applied Off-state current Low-level voltage applied Short-circuit output current3 ICCH Supply current (total)
VCC = 0.0, VI = 7.0V
IIH
High level High-level input current Industrial range
IIL IOZH IOZL IOS ICC
Low-level Low level input current
ICCL
ICCZ 83 90 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. 3. Not more than one output should be shorted at a time. For testing IOS, the use of high-speed test apparatus and/or sample-and-hold techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting of a High output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any sequence of parameter tests, IOS tests should be performed last.
AC ELECTRICAL CHARACTERISTICS
LIMITS SYMBOL PARAMETER TEST CONDITIONS Tamb = +25C, VCC = +5 0V +5.0V CL = 50pF, RL = 500 MIN tPLH tPHL tPLH tPHL tPLH tPHL tPZH tPZL tPHZ tPLZ Propagation delay Dn to Qn Propagation delay Dn to Qn Propagation delay Dn to E, O Output enable time to High or Low level Output disable time from High or Low level 74F655A 74F656A Waveform 2 Waveform 1 Waveform 1, 2 Waveform 3 Waveform 4 Waveform 3 Waveform 4 2.0 1.0 2.0 2.5 5.5 5.5 3.5 4.0 1.5 2.0 TYP 4.5 2.5 4.0 5.5 10.0 11.0 7.0 8.0 4.5 5.0 MAX 6.5 4.0 6.5 7.0 13.0 14.5 10.5 11.0 8.0 8.0 Tamb = 0C to +70C VCC = +5.0V 10% +5 0V CL = 50pF, RL = 500 MIN 2.0 1.0 2.0 2.5 5.5 5.5 3.5 4.5 1.5 2.0 MAX 7.5 4.5 7.0 7.5 14.0 16.5 11.5 12.0 9.0 9.0 Tamb = -40C to +85C VCC = +5.0V 10% +5 0V CL = 50pF, RL = 500 MIN 2.0 1.0 2.0 2.5 4.5 5.5 3.0 4.0 1.5 1.5 MAX 8.5 5.5 8.0 9.0 16.5 18.0 13.0 13.5 10.0 10.0 ns ns ns ns ns ns ns ns ns ns UNIT
* Discontinued part. Please see the Discontinued Products List.
1991 Jul 17 7
Philips Semiconductors
Product specification
Buffers/drivers
74F655A* 74F656A
AC WAVEFORMS
Dn
VM tPLH
VM tPHL VM VM
Dn
VM tPHL
VM tPLH VM VM
SE, SO, Qn
SE, SO, Qn
SF00965
SF00966
Waveform 1. Propagation Delay, Non-Inverting Outputs
Waveform 2. Propagation Delay, Inverting Outputs
OEn
VM tPZH
VM tPHZ VM 0V VOH -0.3V
OEn
VM tPZL
VM tPLZ VM VOL +0.3V
SE, SO, Qn, Qn
SE, SO, Qn, Qn
SF00967
SF00968
Waveform 3. 3-State Output Enable Time to High Level and Output Disable Time from High Level
Waveform 4. 3-State Output Enable Time to Low Level and Output Disable Time from Low Level
TEST CIRCUIT AND WAVEFORM
VCC 7.0V VIN PULSE GENERATOR RT D.U.T. VOUT RL NEGATIVE PULSE 90% 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 AMP (V)
90%
Test Circuit for 3-State Outputs SWITCH POSITION TEST tPLZ tPZL All other SWITCH closed closed open
VM
Input Pulse Definition
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 REQUIREMENTS family amplitude VM 74F 3.0V 1.5V rep. rate 1MHz tw 500ns tTLH 2.5ns tTHL 2.5ns
SF00777
* Discontinued part. Please see the Discontinued Products List.
1991 Jul 17 8
Philips Semiconductors
Product specification
Buffers/drivers
74F655A*, 74F656A
DIP24: plastic dual in-line package; 24 leads (300 mil)
SOT222-1
* Discontinued part. Please see the Discontinued Product List.
1991 Jul 17 9
Philips Semiconductors
Product specification
Buffers/drivers
74F655A*, 74F656A
SO24: plastic small outline package; 24 leads; body width 7.5 mm
SOT137-1
* Discontinued part. Please see the Discontinued Product List.
1991 Jul 17 10
Philips Semiconductors
Product specification
Buffers/drivers
74F655A*, 74F656A
NOTES
* Discontinued part. Please see the Discontinued Product List.
1991 Jul 17 11
Philips Semiconductors
Product specification
Buffers/drivers
74F655A*, 74F656A
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 9397-750-05169
* Discontinued part. Please see the Discontinued Product List.
Philips Semiconductors
yyyy mmm dd 12

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