INTEGRATED CIRCUITS
74F240
Octal inverting buffer (3-state)
Product data
Supersedes data of 2002 Mar 18
2004 Feb 25
Philips Semiconductors
Product data
Octal inverting buffer
74F240
FEATURES
DESCRIPTION
• Octal bus interface
• 3-state buffer outputs sink 64 mA
• 15 mA source current
TYPE
The 74F240 is an octal inverting buffer that is ideal for driving bus
lines of buffer memory address registers. The outputs are all
capable of sinking 64 mA and sourcing up to 15 mA. The device
features two output enables, each controlling four of the 3-state
outputs.
TYPICAL PROPAGATION DELAY
TYPICAL SUPPLY CURRENT (TOTAL)
4.3 ns
37 mA
74F240
ORDERING INFORMATION
ORDER CODE
DESCRIPTION
COMMERCIAL RANGE
VCC = 5 V ±10%, Tamb = 0 °C to +70 °C
PKG DWG #
20-pin plastic DIP
N74F240N
SOT146-1
20-pin plastic SOL
N74F240D
SOT163-1
20-pin plastic SSOP II
N74F240DB
SOT339-1
INPUT AND OUTPUT LOADING AND FAN OUT TABLE
PINS
DESCRIPTION
74F (U.L.)
HIGH/LOW
LOAD VALUE
HIGH/LOW
Data inputs
1.0/1.67
20 µA/1.0 mA
OEa, OEb
Output enable inputs (Active-LOW)
1.0/0.33
20 µA/0.2 mA
Yan, Ybn
Data outputs
750/106.7
15 mA/64 mA
Ian, Ibn
Note to input and output loading and fan out table
One (1.0) FAST unit load is defined as: 20 µA in the HIGH state and 0.6 mA in the LOW state.
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
4
6
8
17
15
13
Ia0
Ia1
Ia2
Ia3
Ib0
Ib1
Ib2 Ib3
1
OEa
19
OEb
11
Ya0 Ya1 Ya2 Ya3 Yb0 Yb1 Yb2 Yb3
18
16
14
12
3
5
7
9
11 Ib3
VCC = Pin 20
GND = Pin 10
SF00320
2004 Feb 25
2
2
SF00321
Philips Semiconductors
Product data
Octal inverting buffer
74F240
IEC/IEEE SYMBOL
LOGIC DIAGRAM
1
EN1
19
Ia0
2
18
4
16
6
14
8
12
Ya0
Ib0
Ya1
Ib1
Ya2
Ib2
Ya3
Ib3
17
3
15
5
13
7
11
9
Yb0
EN2
Ia1
2
2D
1
4
16
6
14
8
12
17
Yb1
18
Ia2
Ia3
3
2
15
5
13
7
11
9
OEa
1
Yb3
10
OEb
VCC = Pin 20
GND = Pin 10
SF00322
Yb2
SF00323
FUNCTION TABLE
INPUTS
OEa
OUTPUTS
Ia
OEb
Ib
Ya
Yb
L
L
L
H
L
L
H
H
L
H
L
L
H
X
H
X
Z
Z
NOTES:
H = High voltage level
L = Low voltage level
X = Don’t care
Z = 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.)
RATING
UNIT
VCC
Supply voltage
PARAMETER
–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
128
mA
Tamb
Operating free air temperature range
0 to +70
°C
Tstg
Storage temperature range
–65 to +150
°C
SYMBOL
RECOMMENDED OPERATING CONDITIONS
LIMITS
SYMBOL
PARAMETER
MIN
NOM
MAX
5.0
5.5
UNIT
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
2004 Feb 25
0
3
V
V
Philips Semiconductors
Product data
Octal inverting buffer
74F240
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
SYMBOL
TEST CONDITIONS1
PARAMETER
LIMITS
MIN
VOH
O
VCC = MIN; VIL
= MAX; VIH =
MIN
High level output voltage
High-level
VCC = MIN; VIL
= MAX; VIH =
MIN
IOH
3 mA
O = –3
IOH
15 mA
O = –15
TYP2
UNIT
MAX
±10%VCC
2.4
±5%VCC
2.7
±10%VCC
2.0
V
±5%VCC
2.0
V
V
3.4
±10%VCC
V
0.50
V
0.42
0.50
V
–0.73
–1.2
V
VCC = MAX; VI = 7.0 V
100
µA
VCC = MAX; VI = 2.7 V
20
µA
Low-level input current
VCC = MAX; VI = 0.5 V
–1.0
mA
IOZH
Off-state output current,
high-level voltage applied
VCC = MAX, VO = 2.7 V
50
µA
IOZL
Off-state output current,
low-level voltage applied
VCC = MAX, VO = 0.5 V
–50
µA
IOS
Short-circuit output current3
VOL
O
Low level output voltage
Low-level
VIK
Input clamp voltage
VCC = MIN; II = IIK
II
Input current at maximum input voltage
IIH
High-level input current
IIL
VCC = MAX
Supply current (total)
ICCL
±5%VCC
–100
ICCH
ICC
IOL
O = MAX
VCC = MAX
ICCZ
–225
mA
12
18
mA
50
70
mA
35
45
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 = 5 V, 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.
2004 Feb 25
4
Philips Semiconductors
Product data
Octal inverting buffer
74F240
AC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL
PARAMETER
Tamb = +25 °C
VCC = +5.0 V
CL = 50 pF; RL = 500 Ω
TEST
CONDITION
Tamb = 0 °C to +70 °C
VCC = +5.0 V ± 10%
CL = 50 pF; RL = 500 Ω
MIN
TYP
MAX
MIN
MAX
Waveform 1
3.0
2.0
4.5
3.0
6.5
4.5
3.0
2.0
7.5
5.0
ns
Output enable time
to high or low level
Waveform 2 & 3
3.0
4.5
5.0
6.5
7.5
8.5
3.0
4.0
9.0
10.0
ns
Output disable time
from high or low level
Waveform 2 & 3
3.0
3.0
5.5
5.0
7.0
7.0
3.0
3.0
7.5
7.5
ns
tPLH
tPHL
Propagation delay
Ian, Ibn to Yn
tPZH
tPZL
tPHZ
tPLZ
NOTES:
1. | tPN actual – tPM actual| for any output compared to any other output where N and M are either LH or HL.
2004 Feb 25
UNIT
5
Philips Semiconductors
Product data
Octal inverting buffer
74F240
AC WAVEFORMS
Ian, Ibn
VM
OEn
VM
VM
VM
OEb
tPHL
tPLH
VM
Yn
tPZL
VM
tPLZ
3.5V
VM
Yn, Yn
SF00328
VOL +0.3V
SF00331
Waveform 1. Propagation delay for inverting outputs
Waveform 3. 3-state output enable time to low level and output
disable time from low level
OEn
VM
VM
tPZH
tPHZ
OEb
Yn, Yn
Notes to AC waveforms
1. For all waveforms, VM = 1.5 V.
VOH -0.3V
VM
0V
SF00330
Waveform 2. 3-state output enable time to high level
and output disable time from high level
TEST CIRCUIT AND WAVEFORMS
VCC
7.0 V
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%
Test Circuit for Open Collector Outputs
POSITIVE
PULSE
90%
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
3.0 V
1.5 V
rep. rate
1 MHz
tw
tTLH
500 ns 2.5 ns
tTHL
2.5 ns
SF00128
2004 Feb 25
6
Philips Semiconductors
Product data
Octal inverting buffer
74F240
DIP20: plastic dual in-line package; 20 leads (300 mil)
2004 Feb 25
7
SOT146-1
Philips Semiconductors
Product data
Octal inverting buffer
74F240
SO20: plastic small outline package; 20 leads; body width 7.5 mm
2004 Feb 25
8
SOT163-1
Philips Semiconductors
Product data
Octal inverting buffer
74F240
SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm
2004 Feb 25
9
SOT339-1
Philips Semiconductors
Product data
Octal inverting buffer
74F240
REVISION HISTORY
Rev
Date
Description
_4
20040225
Product data (9397 750 12941); supersedes data sheet 74F240_241_241A_3 of 2002 Mar 18 (9397 750
09571).
Modifications:
• Delete all references to 74F241A (product discontinued).
• Separate 74F240 and 74F241 into standalone data sheets.
_3
20020318
2004 Feb 25
Product data (9397 750 09571); supersedes previous version.
10
Philips Semiconductors
Product data
Octal inverting buffer
74F240
Data sheet status
Level
Data sheet status [1]
Product
status [2] [3]
Definitions
I
Objective data
Development
This data sheet contains data from the objective specification for product development.
Philips Semiconductors reserves the right to change the specification in any manner without notice.
II
Preliminary data
Qualification
This data sheet contains data from the preliminary specification. Supplementary data will be published
at a later date. Philips Semiconductors reserves the right to change the specification without notice, in
order to improve the design and supply the best possible product.
III
Product data
Production
This data sheet contains data from the product specification. Philips Semiconductors reserves the
right to make changes at any time in order to improve the design, manufacturing and supply. Relevant
changes will be communicated via a Customer Product/Process Change Notification (CPCN).
[1] Please consult the most recently issued data sheet before initiating or completing a design.
[2] The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at URL
http://www.semiconductors.philips.com.
[3] For data sheets describing multiple type numbers, the highest-level product status determines the data sheet status.
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 60134). 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 in the products—including circuits, standard cells, and/or software—described
or contained herein in order to improve design and/or performance. When the product is in full production (status ‘Production’), relevant changes will be communicated
via a Customer Product/Process Change Notification (CPCN). 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.
Koninklijke Philips Electronics N.V. 2004
All rights reserved. Printed in U.S.A.
Contact information
For additional information please visit
http://www.semiconductors.philips.com.
Fax: +31 40 27 24825
Date of release: 02-04
For sales offices addresses send e-mail to:
sales.addresses@www.semiconductors.philips.com.
Document order number:
2004 Feb 25
11
9397 750 12941
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