ETC 74F1240N

INTEGRATED CIRCUITS
74F1240
Octal inverter buffer (3-State)
Product specification
Supercedes data of 1999 Jan 08
IC15 Data Handbook
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2000 Jun 30
Philips Semiconductors
Product specification
Octal inverter buffer (3-State)
74F1240
FEATURES
• High impedance NPN base inputs for reduced loading
TYPE
TYPICAL
PROPAGATION
DELAY
TYPICAL
SUPPLY CURRENT
(TOTAL)
74F1240
3.5ns
40mA
(20µA in High and Low states)
• Low power, light loading
• Functional pin-for-pin equivalent of 74F240
• 1/30th the bus loading of 74F240
• Provides ideal interface and increase fan-out of MOS
ORDERING INFORMATION
microprocessors
• Octal bus interface
• 3-State buffer outputs sink 64mA
• 15mA source current
DESCRIPTION
COMMERCIAL RANGE
VCC = 5V ±10%,
Tamb = 0°C to +70°C
DRAWING
NUMBER
20-pin plastic DIP
N74F1240N
SOT146-1
20-pin plastic SOL
N74F1240D
SOT163-1
DESCRIPTION
The 74F1240 is an octal buffer that is 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
DESCRIPTION
74F (U.L.)
HIGH/LOW
LOAD VALUE
HIGH/LOW
Data inputs
1.0/0.033
20µA/20µA
OEa, OEb
Output enable inputs (active Low)
1.0/0.033
20µA/20µA
Yan, Ybn
Data outputs (74F1240)
750/106.7
15mA/64mA
NOTE: One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state.
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853–0039 24025
Philips Semiconductors
Product specification
Octal inverter buffer (3-State)
74F1240
PIN CONFIGURATION
LOGIC SYMBOL
OEa
1
20 VCC
Ia0
2
19 OEb
Yb0
3
18 Ya0
Ia1
4
17 Ib0
Yb1
5
16 Ya1
Ia2
6
15 Ib1
Yb2
7
14 Ya2
Ia3
8
13 Ib2
Yb3
9
12 Ya3
GND 10
14
8
12
17
5
13
7
11
9
SF01367
LOGIC DIAGRAM
OEb
Ia2
Ia3
Ib0
Ib1
Ib2 Ib3
OEa
19
OEb
16
14
12
3
5
7
9
SF00321
OUTPUTS
OEa
Ia
OEb
Ib
Ya
Yb
L
L
L
L
H
H
L
H
L
H
L
L
X
H
X
Z
Z
H
H
L
X
Z
3
2
15
Ib3
Ia1
18
1
6
Ib2
Ia0
1
11
FUNCTION TABLE
16
Ib1
13
VCC = Pin 20
GND = Pin 10
4
Ib0
15
18
EN2
2
OEa
17
EN1
19
Ia3
8
INPUTS
1
Ia2
6
11 Ib3
IEC/IEEE SYMBOL
Ia1
4
Ya0 Ya1 Ya2 Ya3 Yb0 Yb1 Yb2 Yb3
SF00320
Ia0
2
2
18
4
16
6
14
8
12
Ya0
Ya1
Ya2
Ya3
1
17
3
15
5
13
7
11
9
Yb0
Yb1
Yb2
Yb3
19
SF01369
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3
=
=
=
=
High voltage level
Low voltage level
Don’t care
High impedance “off” state
Philips Semiconductors
Product specification
Octal inverter buffer (3-State)
74F1240
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
VCC
Supply voltage
–0.5 to +7.0
V
VIN
Input voltage
–0.5 to +7.0
V
IIN
Input current
–30 to +5
mA
VOUT
Voltage applied to output in High output state
–0.5 to VCC
V
IOUT
Current applied to output in Low output state
Tamb
Operating free-air temperature range
Tstg
Storage temperature range
128
mA
0 to +70
°C
–65 to +150
°C
RECOMMENDED OPERATING CONDITIONS
LIMITS
SYMBOL
PARAMETER
UNIT
MIN
NOM
MAX
5.0
5.5
VCC
Supply voltage
4.5
VIH
High-level input voltage
2.0
VIL
Low-level input voltage
0.8
V
IIK
Input clamp current
–18
mA
IOH
High-level output current
–15
mA
IOL
Low-level output current
64
mA
Tamb
Operating free-air temperature range
+70
°C
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0
4
V
V
Philips Semiconductors
Product specification
Octal inverter buffer (3-State)
74F1240
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
SYMBOL
VOH
O
VCC = MIN
VIL = MAX
VIH = MIN
High level output voltage
High-level
VOL
O
Low level output voltage
Low-level
VIK
LIMITS
TEST CONDITIONS1
PARAMETER
VCC = MIN
VIL = MAX
VIH = MIN
IOH
3mA
O = –3mA
IOH
15mA
O = –15mA
MIN
TYP2
MAX
UNIT
±10% VCC
2.4
±5% VCC
2.7
±10% VCC
2.0
V
±5% VCC
2.0
V
V
3.3
V
IOL = 48mA
±10% VCC
0.38
0.55
V
IOL = 64mA
±5% VCC
0.42
0.55
V
–0.73
–1.2
V
100
µA
Input clamp voltage
VCC = MIN, II = IIK
II
Input current at maximum input voltage
VCC = 0.0V, VI = 7.0V
IIH
High-level input current
VCC = MAX, VI = 2.7V
20
µA
IIL
Low-level input current
VCC = MAX, VI = 0.5V
–20
µA
IOZH
Off-state output current,
High-level voltage applied
VCC = MAX, VO = 2.7V
50
µA
IOZL
Off-state output current,
Low-level voltage applied
VCC = MAX, VO = 0.5V
–50
µA
IOS
Short-circuit output current3
VCC = MAX
–225
mA
22
30
mA
ICC
Supply current (total)
58
75
mA
44
58
mA
–100
ICCH
ICCL
VCC = MAX
ICCZ
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 = 25°C.
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
Tamb = +25°C
VCC = +5.0V
CL = 50pF, RL = 500Ω
TEST
CONDITION
Tamb = 0°C to +70°C
VCC = +5.0V ± 10%
CL = 50pF, RL = 500Ω
MIN
TYP
MAX
MIN
MAX
UNIT
tPLH
tPHL
Propagation delay
Ian, Ibn, to Yn
Waveform 1
3.0
1.5
4.5
2.5
6.5
4.5
2.5
1.5
7.5
5.0
ns
ns
tPZH
tPZL
Output Enable time
to High or Low level
Waveform 3
Waveform 4
3.0
4.0
5.5
7.0
7.5
9.0
3.0
4.0
8.0
9.5
ns
ns
tPHZ
tPLZ
Output Disable time
to High or Low level
Waveform 3
Waveform 4
2.0
2.0
4.0
4.0
6.0
5.5
2.0
2.0
6.5
6.0
ns
ns
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Philips Semiconductors
Product specification
Octal inverter buffer (3-State)
74F1240
AC WAVEFORMS
For all waveforms, VM = 1.5V.
Ian, Ibn
VM
Ian, Ibn
VM
tPHL
VM
tPHL
tPLH
tPLH
VM
Yn
VM
Yn
VM
VM
VM
SF00328
Waveform 1.
SF00329
For Inverting Outputs
Waveform 2.
OEn
For Non-inverting Outputs
OEn
VM
VM
VM
OEb
VM
OEb
tPZH
VOH -0.3V
tPHZ
Yn, Yn
tPZL
VM
tPLZ
3.5V
VM
Yn, Yn
0V
VOL +0.3V
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
TEST CIRCUIT AND WAVEFORMS
VCC
7.0V
VIN
RL
VOUT
PULSE
GENERATOR
tw
90%
NEGATIVE
PULSE
VM
CL
AMP (V)
VM
10%
D.U.T.
RT
90%
10%
tTHL (tf )
tTLH (tr )
tTLH (tr )
tTHL (tf )
0V
RL
AMP (V)
90%
90%
Test Circuit for Open Collector Outputs
POSITIVE
PULSE
VM
VM
10%
TEST
tPLZ
tPZL
All other
SWITCH
closed
closed
open
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.
10%
tw
SWITCH POSITION
0V
Input Pulse Definition
INPUT PULSE REQUIREMENTS
family
amplitude VM
74F
3.0V
1.5V
rep. rate
tw
tTLH
tTHL
1MHz
500ns
2.5ns
2.5ns
SF00128
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Philips Semiconductors
Product specification
Octal inverter buffer (3-State)
74F1240
DIP20: plastic dual in-line package; 20 leads (300 mil)
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SOT146-1
Philips Semiconductors
Product specification
Octal inverter buffer (3-State)
74F1240
SO20: plastic small outline package; 20 leads; body width 7.5 mm
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SOT163-1
Philips Semiconductors
Product specification
Octal inverter buffer (3-State)
74F1240
NOTES
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Philips Semiconductors
Product specification
Octal inverter buffer (3-State)
74F1240
Data sheet status
Data sheet
status
Product
status
Definition [1]
Objective
specification
Development
This data sheet contains the design target or goal specifications for product development.
Specification may change in any manner without notice.
Preliminary
specification
Qualification
This data sheet contains preliminary data, and supplementary data will be published at a later date.
Philips Semiconductors reserves the right to make changes at any time without notice in order to
improve design and supply the best possible product.
Product
specification
Production
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.
[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.
 Copyright Philips Electronics North America Corporation 2000
All rights reserved. Printed in U.S.A.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone 800-234-7381
Date of release: 06-00
Document order number:
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