Page 1
INTEGRATED CIRCUITS
74F2240
Octal inverter buffer with 30Ω equivalent
output termination (3-State)
74F2241
Octal buffer with 30Ω equivalent output
termination (3-State)
Product specification
IC15 Data Handbook
1990 Dec 13
Page 2
Philips Semiconductors Product specification
74F2240, 74F2241Octal buffers
FEA TURES
•Octal bus interface
•30Ω output termination ideal for driving DRAM
•15mA source current
DESCRIPTION
The 74F2240 and 74F2241 are octal buffers that are ideal for
driving dynamic DRAM with impedance matching. The outputs are
all capable of sinking 5mA and sourcing up to 15mA. The device
features two output enables, each controlling four of the 3-state
outputs.
TYPICAL
PROPAGATION
TYPE
DELA Y
74F2240 4.3ns 37mA
74F2241 4.5ns 30mA
ORDERING INFORMATION
ORDER CODE
DESCRIPTION COMMERCIAL RANGE
= 5V ±10%,
V
CC
T
= 0°C to +70°C
amb
20-pin plastic DIP N74F2240N, N74F2241N SOT146-1
20-pin plastic SOL N74F2240D, N74F2241D SOT163-1
TYPICAL
SUPPLY CURRENT
(TOTAL)
PKG DWG #
PIN CONFIGURATION
1
OEa
2
Ia0
3
Y
b0
4
Ia1
5
b1
Y
6
Ia2
7
Y
b2
8
Ia3
9
Yb3
10 11
GND
LOGIC SYMBOL
246817151311
Ia0 Ia1 Ia2 Ia3 Ib0 Ib1 Ib2 Ib3
1
OEa
19
OEb
Ya0 Ya1 Ya2 Ya3Yb0Yb1Yb2Yb3
74F2240
74F2240
20
V
CC
19
OEb
18
Y
a0
17
Ib0
16
Y
a1
15
Ib1
14
Y
a2
13
Ib2
12
a3
Y
Ib3
SF00561
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS DESCRIPTION
74F (U.L.)
HIGH/LOW
Ian, Ibn Data inputs 1.0/0.33 20µA/0.2mA
OEa, OEb
OEb
Output enable inputs
(active Low)
Output enable input
(74F2241)
1.0/0.33
1.0/0.33
Yan, Ybn Data outputs (74F2241) 750/8.33 15mA/5mA
Yan, Ybn Data outputs (74F2240) 750/8.33 15mA/5mA
NOTE: One (1.0) FAST unit load is defined as: 20µA in the High
state and 0.6mA in the Low state.
LOAD
VALUE
HIGH/LOW
20µA/0.2mA
20µA/0.2mA
181614123579
V
= Pin 20
CC
GND = Pin 10
IEC/IEEE SYMBOL
1
19
2
4
6
8
17
15
13
11
EN1
EN2
2D
74F2240
SF00562
1
2
18
16
14
12
3
5
7
9
SF00563
December 13, 1990 853-1524 01255
2
Page 3
Philips Semiconductors Product specification
74F2240, 74F2241Octal buffers
PIN CONFIGURATION
1
OEa
2
Ia0
3
Yb0
4
Ia1
5
Yb1
6
Ia2
7
Yb2
8
Ia3
9
Yb3
10 11
GND
LOGIC SYMBOL
246817151311
Ia0 Ia1 Ia2 Ia3 Ib0 Ib1 Ib2 Ib3
1
OEa
19
OEb
Ya0 Ya1 Ya2 Ya3Yb0Yb1Yb2Yb3
181614123579
= Pin 20
V
CC
GND = Pin 10
IEC/IEEE SYMBOL
1
19
2
4
6
8
17
15
13
11
EN1
EN2
2D
74F2241
74F2241
74F2241
1
2
V
20
CC
19
OEb
18
Ya0
17
Ib0
16
Ya1
15
Ib1
14
Ya2
13
Ib2
12
Ya3
Ib3
SF00565
LOGIC DIAGRAM FOR 74F2240
2
Y
5
Y
7
Y
9
Y
SF00567
b0
b1
b2
b3
SF00564
2
Ia0
4
Ia1
6
Ia2
8
Ia3
1
a
OE
VCC = Pin 20
GND = Pin 10
OE
Ib0
Ib1
Ib2
Ib3
17
15
13
11
10
b
18
Y
a0
15
Y
a1
14
a2
Y
12
Y
a3
LOGIC DIAGRAM FOR 74F2241
Ia0
Ia1
Ia2
Ia3
a
OE
VCC = Pin 20
GND = Pin 10
2
4
6
8
1
18
Ya0
15
Ya1
14
Ya2
12
Ya3
Ib0
Ib1
Ib2
OEb
17
15
13
11
Ib
10
2
Yb0
5
Yb1
7
Yb2
9
Yb3
SF00568
FUNCTION TABLE FOR 74F2240
INPUTS OUTPUTS
OEa Ia OEb Ib Ya Yb
L L L L H H
L H L H L L
H X H X Z Z
18
16
14
12
3
5
7
9
SF00566
Notes to function table for 74F2240
H = High voltage level
L = Low voltage level
X = Don’t care
Z = High impedance ”off” state
FUNCTION TABLE FOR 74F2241
INPUTS OUTPUTS
OEa Ia OEb Ib Ya Yb
L L H L L L
L H H H H H
H X L X Z Z
Notes to function table for 74F2241
H = High voltage level
L = Low voltage level
X = Don’t care
Z = High impedance ”off” state
December 13, 1990
3
Page 4
Philips Semiconductors Product specification
74F2240, 74F2241Octal buffers
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
V
I
T
V
V
I
OUT
OUT
amb
T
Supply voltage –0.5 to +7.0 V
CC
Input voltage –0.5 to +7.0 V
IN
Input current –30 to +5 mA
IN
Voltage applied to output in high output state –0.5 to V
Current applied to output in low output state
Operating free air temperature range 0 to +70
Storage temperature range –65 to +150
stg
RECOMMENDED OPERATING CONDITIONS
SYMBOL PARAMETER LIMITS UNIT
T
V
V
V
I
OH
I
OL
amb
Supply voltage 4.5 5.0 5.5 V
CC
High–level input voltage 2.0 V
IH
Low–level input voltage 0.8 V
IL
I
Input clamp current –18 mA
Ik
High–level output current –15 mA
Low–level output current
Operating free air temperature range 0 +70
PARAMETER RATING UNIT
CC
10 mA
V
°C
°C
MIN NOM MAX
5 mA
°C
December 13, 1990
4
Page 5
Philips Semiconductors Product specification
3
74F2240, 74F2241Octal buffers
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
SYMBOL
V
V
V
I
OZH
I
OZL
I
I
I
I
OS
CC
OH
IH
High-level output voltage
Low-level output voltage
OL
Input clamp voltage VCC = MIN, II = I
IK
I
Input current at maximum input voltage VCC = MAX, VI = 7.0V 100 µA
I
High–level input current VCC = MAX, VI = 2.7V 20 µA
Low–level input current VCC = MAX, VI = 0.5V –0.2 mA
IL
Off–state output current,
high–level voltage applied
Off–state output current,
low–level voltage applied
Short–circuit output current
Supply current (total) I
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applic able type.
2. All typical values are at V
3. Not more than one output should be shorted at a time. For testing I
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, I
PARAMETER TEST LIMITS UNIT
CONDITIONS
VCC = MIN, IOH = –3mA
VIL = MAX,
VIH = MIN IOH =
–15mA
VCC = MIN,
V
= MAX,
IL
IOL = MAX
VIH = MIN, ±5%V
IK
VCC = MAX, V
VCC = MAX, VO = 0.5V –50
= 2.7V 50
O
1
±10%V
C
±5%V
±10%V
C
±5%V
±10%V
C
MIN TYP2MAX
2.4 V
C
2.7 3.4 V
CC
2.0 V
C
2.0 V
CC
C
CC
0.42 0.50 V
0.50 V
–0.73 -1.2 V
VCC = MAX -60 -150 mA
74F2240 I
74F2241 I
= 5V, T
CC
OS
= 25°C.
amb
tests should be performed last.
I
CCH
CCLVCC
CCZ
I
CCH
CCLVCC
I
CCZ
= MAX 53 75 mA
= MAX 45 65 mA
, the use of high-speed test apparatus and/or sample-and-hold
OS
25 35 mA
35 45 mA
19 30 mA
27 40 mA
µA
µA
AC ELECTRICAL CHARACTERISTICS
T
= +25°C T
amb
SYMBOL PARAMETER TEST VCC = +5.0V
CONDITION CL = 50pF, RL = 500Ω CL = 50pF, RL = 500Ω
MIN TYP MAX MIN MAX
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
December 13, 1990
Propagation delay
Ian, Ibn to Y
n
Output enable time
to high or low level
Output disable time
from high or low level
Propagation delay
Ian, Ibn to Yn
Output enable time
to high or low level
Output disable time
from high or low level
74F2240
Waveform 1
Waveform 3
Waveform 4
Waveform 3
Waveform 4
74F2241
Waveform 2
Waveform 3
Waveform 4
Waveform 3
Waveform 4
5
3.0
2.0
3.0
3.5
2.0
1.0
3.0
2.5
3.0
3.5
2.0
1.5
5.0
3.5
4.5
5.0
3.5
2.5
4.5
4.5
5.0
5.5
4.0
3.5
LIMITS
7.0
5.5
7.0
8.0
6.5
5.5
7.0
6.5
7.0
7.5
6.0
6.0
= 0°C to +70°C
amb
VCC = +5.0V ± 10%
2.5
2.0
2.5
3.0
1.5
1.0
2.5
2.5
2.0
3.0
1.5
1.0
8.0
6.0
8.0
9.0
7.0
5.5
8.0
7.5
8.0
8.5
7.0
6.5
UNIT
ns
ns
ns
ns
ns
ns
Page 6
Philips Semiconductors Product specification
74F2240, 74F2241Octal buffers
AC WAVEFORMS
OEn
OEb
Yn, Y
n
Ian, Ibn
Yn
V
t
PZL
Ian, Ibn
V
M
t
PHL
Yn
V
M
t
PLH
V
V
M
M
SF00328
Waveform 1. Propagation delay for inverting outputs
OEn
OEb
Yn, Y
n
V
t
PZH
M
V
M
t
PHZ
V
M
VOH -0.3V
0V
SF00330
Waveform 3. 3-state output enable time to high level and output
disable time from high level
Waveform 2. Propagation delay for non–inverting outputs
Waveform 4. 3-state output enable time to low level and output
disable time from low level
NOTES:
For all waveforms, V
The shaded areas indicate when the input is permitted to change for predictable output performance.
= 1.5V.
M
TEST CIRCUIT AND WAVEFORMS
V
M
t
PLH
M
V
M
V
M
t
PHL
V
V
t
PLZ
M
SF00329
V
M
3.5V
VOL +0.3V
SF00331
M
V
CC
R
PULSE
GENERATOR
V
IN
R
T
D.U.T.
V
OUT
L
R
C
L
L
Test Circuit for Open Collector Outputs
SWITCH POSITION
TEST SWITCH
t
t
PLZ
PZL
closed
closed
All other open
DEFINITIONS:
R
= Load resistor;
L
see AC electrical characteristics for value.
= Load capacitance includes jig and probe capacitance;
C
L
see AC electrical characteristics for value.
R
= Termination resistance should be equal to Z
T
pulse generators.
OUT
of
7.0V
NEGATIVE
PULSE
POSITIVE
PULSE
family
74F
90%
10%
amplitude
t
w
V
M
10%
t
V
90%
M
THL (tf
t
TLH (tr
)
)
t
TLH (tr
t
THL (tf
t
w
Input Pulse Definition
INPUT PULSE REQUIREMENTS
V
rep. rate
M
3.0V
1.5V
1MHz 500ns
10%
)
)
90%
t
w
V
M
V
M
90%
10%
t
TLH
t
THL
2.5ns 2.5ns
AMP (V)
0V
AMP (V)
0V
SF00128
December 13, 1990
6
Page 7
Philips Semiconductors Product specification
Octal buffers
DIP20: plastic dual in-line package; 20 leads (300 mil) SOT146-1
74F2240/74F2241
1990 Dec 13
7
Page 8
Philips Semiconductors Product specification
Octal buffers
SO20: plastic small outline package; 20 leads; body width 7.5 mm SOT163-1
74F2240/74F2241
1990 Dec 13
8
Page 9
Philips Semiconductors Product specification
Octal buffers
74F2240/74F2241
NOTES
1990 Dec 13
9
Page 10
Philips Semiconductors Product specification
Octal buffers
Data sheet status
Data sheet
status
Objective
specification
Preliminary
specification
Product
specification
Product
status
Development
Qualification
Production
74F2240/74F2241
Definition
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.
[1]
[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
Copyright Philips Electronics North America Corporation 1998
All rights reserved. Printed in U.S.A.
print code Date of release: 10-98
Document order number: 9397-750-05197
yyyy mmm dd
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