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INTEGRATED CIRCUITS
74F1240 Octal inverter buffer (3-State) 74F1241 Octal buffer (3-State)*
* Discontinued part. Please see the Discontinued Product List.
Product specification Supercedes data of 1989 Apr 04 IC15 Data Handbook
1999 Jan 08
Philips Semiconductors
Philips Semiconductors
Product specification
Buffers
74F1240
FEATURES
74F1240, 74F1241*
Octal inverter buffer (3-State)
TYPICAL PROPAGATION DELAY 3.5ns 4.5ns TYPICAL SUPPLY CURRENT (TOTAL) 40mA 46mA
* High impedance NPN base inputs for reduced loading
(20A in High and Low states)
TYPE 74F1240 74F1241
* Low power, light loading * Functional pin-for-pin equivalent of 74F240 and 74F241 * 1/30th the bus loading of 74F240 and 74F241 * Provides ideal interface and increase fan-out of MOS
microprocessors
ORDERING INFORMATION
DESCRIPTION 20-pin plastic DIP 20-pin plastic SOL COMMERCIAL RANGE VCC = 5V 10%, Tamb = 0C to +70C N74F1240N N74F1240D DRAWING NUMBER SOT146-1 SOT163-1
* Octal bus interface * 3-State buffer outputs sink 64mA * 15mA source current
DESCRIPTION
The 74F1240 and 74F1241 are octal buffers that are ideal for driving bus lines or buffer memory address registers. The outputs are capable of sinking 64mA and sourcing up to 15mA, producing very good capacitive drive characteristics. The device features two Output Enables, OEa and OEb, each controlling four of the 3-State outputs.
INPUT AND OUTPUT LOADING AND FAN OUT TABLE
PINS Ian, Ibn OEa, OEb OEb Yan, Ybn Yan, Ybn Data inputs Output enable inputs (active Low) Output enable input (active High, 74F1241) Data outputs (74F1241) Data outputs (74F1240) DESCRIPTION 74F (U.L.) HIGH/LOW 1.0/0.033 1.0/0.033 1.0/0.033 750/106.7 750/106.7 LOAD VALUE HIGH/LOW 20A/20A 20A/20A 20A/20A 15mA/64mA 15mA/64mA
NOTE: One (1.0) FAST unit load is defined as: 20A in the High state and 0.6mA in the Low state.
* Discontinued part. Please see the Discontinued Products List. 1999 Jan 08
2
853-0039 20619
Philips Semiconductors
Product specification
Buffers
74F1240, 74F1241*
PIN CONFIGURATION - 74F1240
OEa Ia0 Yb0 Ia1 Yb1 Ia2 Yb2 Ia3 Yb3 1 2 3 4 5 6 7 8 9 20 VCC 19 OEb 18 Ya0 17 Ib0 16 Ya1 15 Ib1 14 Ya2 13 Ib2 12 Ya3 11 Ib3
PIN CONFIGURATION - 74F1241
OEa Ia0 Yb0 Ia1 Yb1 Ia2 Yb2 Ia3 Yb3 GND 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VCC OEb Ya0 Ib0 Ya1 Ib1 Ya2 Ib2 Ya3 Ib3
GND 10
SF00320
SF00324
LOGIC SYMBOL - 74F1240
2 4 6 8 17 15 13 11
LOGIC SYMBOL - 74F1241
2 4 6 8 17 15 13 11
Ia0 1 19 OEa OEb
Ia1
Ia2
Ia3
Ib0
Ib1
Ib2 Ib3 1 19
Ia0 OEa OEb
Ia1 Ia2
Ia3 Ib0
Ib1 Ib2
Ib3
Ya0 Ya1 Ya2 Ya3 Yb0 Yb1 Yb2 Yb3
Ya0 Ya1 Ya2 Ya3 Yb0 Yb1 Yb2 Yb3
18 VCC = Pin 20 GND = Pin 10
16
14
12
3
5
7
9 VCC = Pin 20 GND = Pin 10
18
16
14
12
3
5
7
9
SF00321
SF00325
IEC/IEEE SYMBOL - 74F1240
1 19 EN1 EN2 18 16 14 12 2 3 5 7 9
IEC/IEEE SYMBOL - 74F1241
1 19 EN1 EN2 18 16 14 12 2 3 5 7 9
2 4 6 8 17 15 13 11
1
2 4 6 8 17 15 13 11
1
SF01367
SF01368
* Discontinued part. Please see the Discontinued Products List.
1999 Jan 08 3
Philips Semiconductors
Product specification
Buffers
74F1240, 74F1241*
LOGIC DIAGRAM - 74F1240
Ia0 Ia1 Ia2 Ia3 2 4 6 8 18 16 14 12 Ya0 Ya1 Ya2 Ya3
LOGIC DIAGRAM - 74F1241
Ia0 Ia1 Ia2 Ia3 2 4 6 8 18 16 14 12 Ya0 Ya1 Ya2 Ya3
OEa
1
OEa 3 5 7 9
1
Ib0 Ib1 Ib2 Ib3
17 15 13 11
Yb0 Yb1 Yb2 Yb3
Ib0 Ib1 Ib2 Ib3
17 15 13 11
3 5 7 9
Yb0 Yb1 Yb2 Yb3
OEb
19
OEb
19
SF01369
SF01370
FUNCTION TABLE - 74F1240
INPUTS OEa L L H H L X Z = = = = Ia L H X OEb L L H Ib L H X OUTPUTS Ya H L Z Yb H L Z
FUNCTION TABLE - 74F1241
INPUTS OEa L L H H L X Z = = = = Ia L H X OEb H H L Ib L H X OUTPUTS Ya L H Z Yb L H Z
High voltage level Low voltage level Don't care High impedance "off" state
High voltage level Low voltage level Don't care High impedance "off" state
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
* Discontinued part. Please see the Discontinued Products List.
1999 Jan 08 4
Philips Semiconductors
Product specification
Buffers
74F1240, 74F1241*
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 Operating free-air temperature range 0 PARAMETER MIN 4.5 2.0 0.8 -18 -15 64 +70 NOM 5.0 MAX 5.5 V V V mA mA mA C UNIT
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.) SYMBOL PARAMETER TEST CONDITIONS1 10% VCC 5% VCC 10% VCC 5% VCC 10% VCC 5% VCC LIMITS MIN 2.4 2.7 2.0 2.0 0.38 0.42 -0.73 0.55 0.55 -1.2 100 20 -20 50 -50 -100 22 VCC = MAX 58 44 33 VCC = MAX 62 45 -225 30 75 58 44 80 60 3.3 TYP MAX UNIT V V V V V V V A A A A A mA mA mA mA mA mA mA
VO OH
High-level High level output voltage
VCC = MIN VIL = MAX VIH = MIN VCC = MIN VIL = MAX VIH = MIN
IO = -3mA 3mA OH
IO = -15mA 15mA OH IOL = 48mA IOL = 64mA
VO OL VIK II IIH IIL IOZH IOZL IOS
Low-level Low level output voltage Input clamp voltage Input current at maximum input voltage High-level input current Low-level input current Off-state output current, High-level voltage applied Off-state output current, Low-level voltage applied Short-circuit output current3 ICCH 74F1240 ICCL ICCZ ICCH 74F1241 ICCL ICCZ
VCC = MIN, II = IIK VCC = 0.0V, VI = 7.0V VCC = MAX, VI = 2.7V VCC = MAX, VI = 0.5V VCC = MAX, VO = 2.7V VCC = MAX, VO = 0.5V VCC = MAX
ICC
Supply current (total)
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.
* Discontinued part. Please see the Discontinued Products List.
1999 Jan 08 5
Philips Semiconductors
Product specification
Buffers
74F1240, 74F1241*
AC ELECTRICAL CHARACTERISTICS
LIMITS SYMBOL PARAMETER TEST CONDITION Tamb = +25C VCC = +5.0V CL = 50pF, RL = 500 MIN tPLH tPHL tPZH tPZL tPHZ tPLZ tPLH tPHL tPZH tPZL tPHZ tPLZ Propagation delay Ian, Ibn, to Yn Output Enable time to High or Low level Output Disable time to High or Low level Propagation delay Ian, Ibn, to Yn Output Enable time to High or Low level Output Disable time to High or Low level 74F1241 74F1240 Waveform 1 Waveform 3 Waveform 4 Waveform 3 Waveform 4 Waveform 2 Waveform 3 Waveform 4 Waveform 3 Waveform 4 3.0 1.5 3.0 4.0 2.0 2.0 2.5 2.5 3.0 3.0 3.0 3.0 TYP 4.5 2.5 5.5 7.0 4.0 4.0 4.0 5.0 5.5 6.5 5.5 6.0 MAX 6.5 4.5 7.5 9.0 6.0 5.5 5.5 6.5 7.0 8.0 7.5 8.0 Tamb = 0C to +70C VCC = +5.0V 10% CL = 50pF, RL = 500 MIN 2.5 1.5 3.0 4.0 2.0 2.0 2.5 2.5 3.0 3.0 3.0 3.0 MAX 7.5 5.0 8.0 9.5 6.5 6.0 6.0 7.0 7.5 8.5 8.5 8.5 ns ns ns ns ns ns ns ns ns ns ns ns UNIT
AC WAVEFORMS
For all waveforms, VM = 1.5V.
Ian, Ibn VM tPHL VM tPLH Yn Ian, Ibn VM tPLH VM tPHL
Yn
VM
VM
VM
VM
SF00328
SF00329
Waveform 1.
For Inverting Outputs
Waveform 2.
For Non-inverting Outputs
OEn VM OEb tPZH Yn, Yn VM 0V tPHZ VOH -0.3V VM
OEn VM OEb tPZL Yn, Yn VM VOL +0.3V tPLZ 3.5V VM
SF00330
SF00331
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
* Discontinued part. Please see the Discontinued Products List.
1999 Jan 08 6
Philips Semiconductors
Product specification
Buffers
74F1240, 74F1241*
TEST CIRCUIT AND WAVEFORMS
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 Open Collector 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
SF00128
* Discontinued part. Please see the Discontinued Products List.
1999 Jan 08 7
Philips Semiconductors
Product specification
Buffers
74F1240, 74F1241*
DIP20: plastic dual in-line package; 20 leads (300 mil)
SOT146-1
* Discontinued part. Please see the Discontinued Product List.
1999 Jan 08 8
Philips Semiconductors
Product specification
Buffers
74F1240, 74F1241*
SO20: plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
* Discontinued part. Please see the Discontinued Product List.
1999 Jan 08 9
Philips Semiconductors
Product specification
Buffers
74F1240, 74F1241*
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. Date of release: 03-98 Document order number: 9397-750-05191
* Discontinued part. Please see the Discontinued Product List in Section 1, page 21.
Philips Semiconductors
1999 Jan 08
* Discontinued part. Please see the Discontinued Product List.
10
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