PHILIPS 74ALS240A-1DB

INTEGRATED CIRCUITS
74ALS240A/74ALS240A–1
Octal inverter buffer (3–State)
Product specification
IC05 Data Handbook
1991 Feb 08
Philips Semiconductors
Product specification
74ALS240A/
74ALS240A-1
Octal inverter buffer (3-State)
FEATURES
PIN CONFIGURATION
• Octal bus interface
• 3-State buffer outputs sink 24mA and source 15mA
• The -1 version sinks 48 mA
OEa
1
20 VCC
Ia0
2
19 OEb
Yb0
3
18 Ya0
DESCRIPTION
The 74ALS240A is an octal buffer that is ideal for driving bus lines or
buffer memory address registers. The outputs are all capable of
sinking 24mA 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.
4
17 Ib0
5
16 Ya1
Ia2
6
15 Ib1
Yb2
7
14 Ya2
Ia3
8
13 Ib2
Yb3
9
12 Ya3
GND 10
The 74ALS240A-1 sinks 48 mA IOL if the VCC is limited to
5.0V ±0.25V.
11 Ib3
SF00320
TYPICAL
PROPAGATION
DELAY
TYPICAL
SUPPLY CURRENT
(TOTAL)
74ALS240A
4.5ns
15mA
74ALS240A-1
4.5ns
15mA
TYPE
Ia1
Yb1
ORDERING INFORMATION
ORDER CODE
DRAWING
NUMBER
DESCRIPTION
COMMERCIAL RANGE
VCC = 5V ±10%,
Tamb = 0°C to +70°C
20-pin plastic DIP
74ALS240AN,
74ALS240A-1N
SOT146-1
20-pin plastic SOL
74ALS240AD,
74ALS240A-1D
SOT163-1
20-pin plastic SSOP
Type II
74ALS240ADB,
74ALS240A-1DB
SOT339-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
Ian, Ibn
74ALS (U.L.)
HIGH/LOW
LOAD VALUE
HIGH/LOW
Data inputs
1.0/1.0
20µA/0.1mA
OEa, OEb
Output Enable inputs (active-Low)
1.0/1.0
20µA/0.1mA
Yan, Ybn
Data outputs
750/240
15mA/24mA
Yan, Ybn
Data outputs (-1 version)
750/480
15mA/48mA
NOTE: One (1.0) ALS unit load is defined as: 20µA in the High state and 0.1mA in the Low state.
LOGIC SYMBOL
IEC/IEEE SYMBOL
2
4
6
8
17
15
13
1
11
19
Ia0
1
19
Ia1
Ia2
Ia3
Ib0
Ib1
Ib2 Ib3
2
OEa
18
1991 Feb 08
EN2
2D
1
16
14
12
3
5
7
16
6
14
8
12
17
9
SF00321
18
4
OEb
Ya0 Ya1 Ya2 Ya3 Yb0 Yb1 Yb2 Yb3
VCC = Pin 20
GND = Pin 10
EN1
2
3
15
5
13
7
11
9
SF00322
2
853–1244 01670
Philips Semiconductors
Product specification
74ALS240A/
74ALS240A-1
Octal inverter buffer (3-State)
LOGIC DIAGRAM
Ia0
Ia1
Ia2
Ia3
OEa
2
FUNCTION TABLE
18
4
16
6
14
8
12
Ya0
Ib0
Ya1
Ib1
Ib2
Ya2
Ib3
Ya3
1
OEb
17
INPUTS
3
15
5
13
7
11
Yb0
OEb
Ib
Ya
Yb
L
L
L
L
H
H
L
H
L
H
L
L
X
H
X
Z
Z
H
Yb2
9
Yb3
10
VCC = Pin 20
GND = Pin 10
Ia
Yb1
H
L
X
Z
OUTPUTS
OEa
=
=
=
=
High voltage level
Low voltage level
Don’t care
High impedance “off” state
SF00323
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
SYMBOL
VOUT
Voltage applied to output in High output state
IOUT
O
Current applied to output in Low output state
Tamb
Operating free-air temperature range
Tstg
Storage temperature range
–0.5 to VCC
V
All versions
48
mA
-1 version
96
mA
0 to +70
°C
–65 to +150
°C
RECOMMENDED OPERATING CONDITIONS
LIMITS
PARAMETER
SYMBOL
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
24
mA
All versions
IOL
O
Tamb
Low level output current
Low-level
-1 version
Operating free-air temperature range
NOTE:
1. The 48mA limit applies only under the condition of VCC = 5.0V ±5%.
1991 Feb 08
3
V
1
mA
+70
°C
48
0
V
Philips Semiconductors
Product specification
74ALS240A/
74ALS240A-1
Octal inverter buffer (3-State)
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
SYMBOL
VOH
TEST CONDITIONS1
PARAMETER
VCC±10%,, VIL = MAX,,
VIH = MIN
High-level
High
level out
output
ut voltage
VCC = MIN, VIL = MAX,
VIH = MIN
All versions
VOL
Low-level
Low
level out
output
ut voltage
-1 version
VIK
VCC = MIN,, VIL = MAX,,
VIH = MIN
VCC = 4.75V, VIL = MAX,
VIH = MIN
LIMITS
MIN
IOH = –0.4mA
VCC – 2
IOH = –3mA
2.4
IOH = –15mA
2.0
TYP2
MAX
UNIT
V
3.2
V
IOL = 12mA
0.25
0.40
V
IOL = 24mA
0.35
0.50
V
IOL = 48mA
0.35
0.50
V
–0.73
Input clamp voltage
VCC = MIN, II = IIK
–1.5
V
II
Input current at maximum input voltage
VCC = MAX, VI = 7.0V
0.1
mA
IIH
High-level input current
VCC = MAX, VI = 2.7V
20
µA
IIL
Low-level input current
VCC = MAX, VI = 0.4V
–0.1
mA
IOZH
Off-state output current,
High-level voltage applied
VCC = MAX, VI = 2.7V
20
µA
IOZL
Off-state output current,
Low-level voltage applied
VCC = MAX, VI = 0.4V
–20
µA
Output current3
VCC = MAX, VO = 2.25V
–112
mA
2.5
11
mA
19.5
23
mA
23
30
IO
–30
ICCH
ICC
Supply current (total)
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. The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.
AC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL
PARAMETER
TEST CONDITION
Tamb = 0°C to +70°C
VCC = +5.0V ± 10%
CL = 50pF, RL = 500Ω
MIN
MAX
UNIT
tPLH
tPHL
Propagation delay
In to Yn
Waveform 1
2.0
2.0
9.0
9.0
ns
tPZH
tPZL
Output Enable time
to High or Low level
Waveform 2
Waveform 3
2.0
3.0
10.0
12.0
ns
tPHZ
tPLZ
Output disable time
from High or Low level
Waveform 2
Waveform 3
2.0
3.0
10.0
12.0
ns
1991 Feb 08
4
Philips Semiconductors
Product specification
74ALS240A/
74ALS240A-1
Octal inverter buffer (3-State)
AC WAVEFORMS
For all waveforms, VM = 1.3V.
Ian, Ibn
VM
VM
tPHL
tPLH
VM
Yn
VM
SF00328
Waveform 1. Propagation Delay for Non-Inverting Output
VM
OEn
tPZH
Yn
VM
OEn
VM
tPHZ
VM
tPZL
VOH –0.3V
tPLZ
3.5V
VM
Yn
VM
0V
VOL +0.3V
SC00077
SC00078
Waveform 2. 3-State Output Enable Time to High Level
and Output Disable Time from High Level
Waveform 3. 3-State Output Enable Time to Low Level
and Output Disable Time from Low Level
TEST CIRCUIT AND WAVEFORMS
VCC
7.0V
VIN
VOUT
PULSE
GENERATOR
tw
90%
NEGATIVE
PULSE
10%
RL
CL
RL
AMP (V)
VM
VM
D.U.T.
RT
90%
10%
tTHL (tff)
tTLH (tr )
tTLH (tr )
tTHL (tf )
0.3V
AMP (V)
90%
Test Circuit for 3-State Outputs
POSITIVE
PULSE
VM
VM
10%
10%
tw
SWITCH POSITION
TEST
SWITCH
closed
tPLZ, tPZL
All other
90%
0.3V
Input Pulse Definition
open
INPUT PULSE REQUIREMENTS
Family
Amplitude VM
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.
74ALS
3.5V
1.3V
Rep.Rate
tw
tTLH
tTHL
1MHz
500ns
2.0ns
2.0ns
SC00072
1991 Feb 08
5
Philips Semiconductors
Product specification
Octal inverter buffer (3–State)
74ALS240A/74ALS240A–1
DIP20: plastic dual in-line package; 20 leads (300 mil)
1991 Feb 08
6
SOT146-1
Philips Semiconductors
Product specification
Octal inverter buffer (3–State)
74ALS240A/74ALS240A–1
SO20: plastic small outline package; 20 leads; body width 7.5 mm
1991 Feb 08
7
SOT163-1
Philips Semiconductors
Product specification
Octal inverter buffer (3–State)
74ALS240A/74ALS240A–1
SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm
1991 Feb 08
8
SOT339-1
Philips Semiconductors
Product specification
Octal inverter buffer (3–State)
74ALS240A/74ALS240A–1
DEFINITIONS
Data Sheet Identification
Product Status
Definition
Objective Specification
Formative or in Design
This data sheet contains the design target or goal specifications for product development. Specifications
may change in any manner without notice.
Preliminary Specification
Preproduction Product
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
Full 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.
Philips Semiconductors and Philips Electronics North America Corporation reserve 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. Applications that are described herein for any of these products are for illustrative purposes
only. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing
or modification.
LIFE SUPPORT APPLICATIONS
Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices,
or systems where malfunction of a Philips Semiconductors and Philips Electronics North America Corporation Product can reasonably be expected
to result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips
Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully
indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale.
 Copyright Philips Electronics North America Corporation 1997
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
1991 Feb 08
9