74LV244
Octal buffer/line driver (3-State)
Product specification
Supersedes data of 1997 Feb 19
IC24 Data Handbook
1998 May 20
INTEGRATED CIRCUITS
Philips Semiconductors Product specification
74LV244Octal buffer/line driver (3-State)
2
1998 May 20 853–1924 19420
FEATURES
•Wide operating voltage: 1.0 to 5.5 V
•Optimized for low voltage applications: 1.0 to 3.6 V
•Accepts TTL input levels between VCC = 2.7 V and VCC = 3.6 V
•Typical VOLP (output ground bounce) < 0.8 V at VCC = 3.3 V,
Tamb = 25°C
•Typical VOHV (output VOH undershoot) > 2 V at VCC = 3.3 V,
Tamb = 25°C
•Output capability: bus driver
•ICC category: MSI
DESCRIPTION
The 74LV244 is a low-voltage Si-gate CMOS device and is pin and
function compatible with 74HC/HCT244.
The 74LV244 is an octal non-inverting buffer/line driver with 3-State
outputs. The 3-State outputs are controlled by the output enable
inputs 1OE and 2OE. A HIGH on nOE causes the outputs to
assume a high impedance OFF-state. The 74LV244 is identical to
the 74LV240 but has non-inverting outputs.
QUICK REFERENCE DATA
GND = 0 V ; Tamb = 25°C; tr = tf ≤ 2.5 ns
SYMBOL PARAMETER CONDITIONS TYPICAL UNIT
tPHL/tPLH Propagation delay
1An to 1Yn;
2An to 2Yn
CL = 15 pF;
VCC = 3.3 V 8.0 ns
CIInput capacitance 3.5 pF
CPD Power dissipation capacitance per buffer VCC = 3.3 V
VI = GND to VCC135 pF
NOTE:
1. CPD is used to determine the dynamic power dissipation (PD in µW)
PD = CPD VCC2 fi (CL VCC2 fo) where:
fi = input frequency in MHz; CL = output load capacitance in pF;
fo = output frequency in MHz; VCC = supply voltage in V ;
(CL VCC2 fo) = sum of the outputs.
ORDERING INFORMATION
PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA PKG. DWG. #
20-Pin Plastic DIL –40°C to +125°C74LV244 N 74LV244 N SOT146-1
20-Pin Plastic SO –40°C to +125°C74LV244 D 74LV244 D SOT163-1
20-Pin Plastic SSOP Type II –40°C to +125°C74LV244 DB 74LV244 DB SOT339-1
20-Pin Plastic TSSOP Type I –40°C to +125°C74LV244 PW 74LV244PW DH SOT360-1
PIN CONFIGURATION
SV00620
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
1OE
1A0
2Y0
1A1
2Y1
1A2
2Y2
1A3
2Y3
GND 2A3
1Y3
2A2
1Y2
2A1
1Y1
2A0
1Y0
2OE
VCC
LOGIC SYMBOL
SV00621
1Y0
2Y0
18
3
1Y1
2Y1
16
5
1Y2
2Y2
14
7
1Y3
2Y3
12
9
1A0
2A0
2
17
1A1
2A1
4
15
1A2
2A2
6
13
1A3
2A3
8
11
1OE1 2OE19
Philips Semiconductors Product specification
74LV244Octal buffer/line driver (3-State)
1998 May 20 3
PIN DESCRIPTION
PIN
NUMBER SYMBOL FUNCTION
1 1OE Output enable input (active LOW)
2, 4, 6, 8 1A0 to 1A3Data inputs
3, 5, 7, 9 2Y0 to 2Y3Bus outputs
10 GND Ground (0 V)
17, 15, 13, 11 2A0 to 2A3Data inputs
18, 16, 14, 12 1Y0 to 1Y3Bus outputs
19 2OE Output enable input (active LOW)
20 VCC Positive supply voltage
LOGIC SYMBOL (IEEE/IEC)
SV00666
18
16
14
12
2
4
6
8
EN
1
9
7
5
3
11
13
15
17
EN
19
FUNCTIONAL DIAGRAM
SV00622
2Y03
2Y15
2Y27
2Y39
2A0
17
2A1
15
2A2
13
2A3
11
2OE19
1Y018
1Y116
1Y214
1Y312
1A0
2
1A1
4
1A2
6
1A3
8
1OE
1
FUNCTION TABLE
INPUTS OUTPUT
nOE nAnnYn
LLL
L H H
H X Z
NOTES:
H = HIGH voltage level
L = LOW voltage level
X = don’t care
Z = high impedance OFF-state
Philips Semiconductors Product specification
74LV244Octal buffer/line driver (3-State)
1998 May 20 4
RECOMMENDED OPERATING CONDITIONS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT
VCC DC supply voltage See Note 1 1.0 3.3 5.5 V
VIInput voltage 0 – VCC V
VOOutput voltage 0 – VCC V
Tamb Operating ambient temperature range in free air See DC and AC
characteristics –40
–40 +85
+125 °C
tr, tfInput rise and fall times VCC = 1.0V to 2.0V
VCC = 2.0V to 2.7V
VCC = 2.7V to 3.6V
VCC = 3.6V to 5.5V
–
–
–
–
–
–
–
–
500
200
100
50 ns/V
NOTE:
1. The LV is guaranteed to function down to VCC = 1.0V (input levels GND or VCC); DC characteristics are guaranteed from VCC = 1.2V to
VCC = 5.5V.
ABSOLUTE MAXIMUM RATINGS1, 2
In accordance with the Absolute Maximum Rating System (IEC 134).
Voltages are referenced to GND (ground = 0V).
SYMBOL PARAMETER CONDITIONS RATING UNIT
VCC DC supply voltage –0.5 to +7.0 V
IIK DC input diode current VI < –0.5 or VI > VCC + 0.5V 20 mA
IOK DC output diode current VO < –0.5 or VO > VCC + 0.5V 50 mA
IODC output source or sink current
– bus driver outputs –0.5V < VO < VCC + 0.5V 35 mA
IGND,
ICC
DC VCC or GND current for types with
– bus driver outputs 70 mA
Tstg Storage temperature range –65 to +150 °C
PTOT
Power dissipation per package
– plastic DIL
– plastic mini-pack (SO)
– plastic shrink mini-pack (SSOP and TSSOP)
for temperature range: –40 to +125°C
above +70°C derate linearly with 12 mW/K
above +70°C derate linearly with 8 mW/K
above +60°C derate linearly with 5.5 mW/K
750
500
400 mW
NOTES:
1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the
device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to
absolute-maximum-rated conditions for extended periods may affect device reliability.
2. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
Philips Semiconductors Product specification
74LV244Octal buffer/line driver (3-State)
1998 May 20 5
DC ELECTRICAL CHARACTERISTICS
Over recommended operating conditions. Voltages are referenced to GND (ground = 0V). LIMITS
SYMBOL PARAMETER TEST CONDITIONS -40°C to +85°C -40°C to +125°CUNIT
MIN TYP1MAX MIN MAX
VCC = 1.2V 0.9 0.9
V
HIGH level Input VCC = 2.0V 1.4 1.4
V
V
IH voltage VCC = 2.7 to 3.6V 2.0 2.0
V
VCC = 4.5 to 5.5V 0.7VCC 0.7VCC
VCC = 1.2V 0.3 0.3
V
LOW level Input VCC = 2.0V 0.6 0.6
V
V
IL voltage VCC = 2.7 to 3.6V 0.8 0.8
V
VCC = 4.5 to 5.5 0.3VCC 0.3VCC
VCC = 1.2V ; V I = VIH or VIL; –IO = 100µA 1.2
HIGH l l t t
VCC = 2.0V ; V I = VIH or VIL; –IO = 100µA 1.8 2.0 1.8
VOH HIGH level output
voltage
;
all out
p
uts
VCC = 2.7V ; V I = VIH or VIL; –IO = 100µA 2.5 2.7 2.5 V
voltage
all
out uts
VCC = 3.0V ; V I = VIH or VIL; –IO = 100µA 2.8 3.0 2.8
VCC = 4.5V ; V I = VIH or VIL; –IO = 100µA 4.3 4.5 4.3
VO
HIGH level output
voltage
;
BUS driver
VCC = 3.0V ; V I = VIH or VIL; –IO = 8mA 2.40 2.82 2.20
V
V
OH
voltage;
BUS
driver
outputs VCC = 4.5V ; V I = VIH or VIL; –IO = 16mA 3.60 4.20 3.50
V
VCC = 1.2V ; V I = VIH or VIL; IO = 100µA 0
LOW l l t t
VCC = 2.0V ; V I = VIH or VIL; IO = 100µA 0 0.2 0.2
VOL LOW level output
voltage
;
all out
p
uts
VCC = 2.7V ; V I = VIH or VIL; IO = 100µA 0 0.2 0.2 V
voltage
all
out uts
VCC = 3.0V ; V I = VIH or VIL; IO = 100µA 0 0.2 0.2
VCC = 4.5V ; V I = VIH or VIL; IO = 100µA 0 0.2 0.2
VO
LOW level output
voltage
;
BUS driver
VCC = 3.0V ; V I = VIH or VIL; IO = 8mA 0.25 0.40 0.50
V
V
OL
voltage;
BUS
driver
outputs VCC = 4.5V ; V I = VIH or VIL; IO = 16mA 0.35 0.55 0.65
V
IIInput leakage
current VCC = 5.5V ; V I = VCC or GND 1.0 1.0 µA
IOZ 3-State output
OFF-state current VCC = 3.6V ; V I = VIH or VIL;
VO = VCC or GND 5 10 µA
ICC Quiescent supply
current; MSI VCC = 5.5V ; V I = VCC or GND; IO = 0 20.0 160 µA
∆ICC Additional
quiescent supply
current per input VCC = 2.7V to 3.6V ; VI = VCC – 0.6V 500 850 µA
NOTE:
1. All typical values are measured at Tamb = 25°C.
Philips Semiconductors Product specification
74LV244Octal buffer/line driver (3-State)
1998 May 20 6
AC CHARACTERISTICS
GND = 0V ; tr = tf ≤ 2.5ns; C L = 50pF; RL =1KΩ
CONDITION
LIMITS
SYMBOL PARAMETER WAVEFORM
CONDITION
–40 to +85 °C–40 to +125 °CUNIT
VCC(V) MIN TYP1MAX MIN MAX
1.2 50
Pro
p
agation delay
2.0 17 24 31
tPHL/tPLH
Pro agation
delay
1An to 1Yn;
2A to 2Y
Figures 1, 2 2.7 13 17 23 ns
2A
n
t
o
2Y
n3.0 to 3.6 9214 18
4.5 to 5.5 12 15
1.2 65
3
-
State out
p
ut enable time
2.0 22 39 49
tPZH/tPZL
3-State
out ut
enable
time
1OE to 1Yn;
2OE to 2Y
Figures 2, 3 2.7 16 29 36 ns
2OE
t
o
2Y
n3.0 to 3.6 12223 29
4.5 to 5.5 19 24
1.2 60
3
-
State out
p
ut disable time
2.0 22 34 43
tPHZ/tPLZ
3-State
out ut
disable
time
1OE to 1Yn;
2OE to 2Y
Figures 2, 3 2.7 17 24 32 ns
2OE
t
o
2Y
n3.0 to 3.6 13221 26
4.5 to 5.5 16 19
NOTES:
1. Unless otherwise stated, all typical values are measured at Tamb = 25°C.
2. Typical values are measured at VCC = 3.3 V.
AC WAVEFORMS
VM = 1 . 5 V a t VCC ≥ 2.7 V a n d ≤ 3.6 V
VM = 0 . 5 × VCC at VCC < 2 .7 V a n d ≥ 4.5 V
VOL an d V OH are the typical output voltage drop that occur with the
output load.
VX = V OL + 0. 3 V a t VCC ≥ 2.7 V and ≤ 3.6 V
VX = V OL + 0. 1 ×VCC at VCC < 2.7 V and ≥ 4.5 V
VY = VOH – 0.3 V at VCC ≥2.7V an d ≤ 3.6 V
VY = VOH – 0.1 × VCC at VCC < 2.7 V and ≥ 4.5 V
SV00617
VM
1An, 2An
INPUTS
1Yn, 2Yn
OUTPUT VM
tPLH
tPHL
GND
VOL
VI
VOH
Figure 1. Input (1An, 2An) to output (1Yn, 2Yn)
propagation delays.
SV00623
outputs
disabled outputs
enabled
outputs
enabled
tPHZ tPZH
tPZL
tPLZ
HIGH-to-OFF
OFF-to-HIGH
LOW-to-OFF
OFF-to-LOW
VM
VM
OE INPUT
VX
VOL
VOH VY
GND
GND
VCC
VI
VM
Qn OUTPUT
Qn OUTPUT
Figure 2. 3-State enable and disable times.
Philips Semiconductors Product specification
74LV244Octal buffer/line driver (3-State)
1998 May 20 7
TEST CIRCUIT
SWITCH POSITION
PULSE
GENERATOR
RT
VID.U.T.
VO
CLRL = 1k
VCC
Test Circuit for Outputs
DEFINITIONS
VCC VI
< 2.7V VCC
TEST
tPLH/tPHL
RT = Termination resistance should be equal to ZOUT of pulse generators.
2.7V
2.7–3.6V
4.5V VCC
50 pF
SV00896
S1
tPLZ/tPZL
tPHZ/tPZH
Open
2 * VCC
GND
RL = 1k
Open
2 * VCC
GND
RL = Load resistor
CL = Load capacitance includes jig and probe capacitiance.
Figure 3. Load circuitry for switching times.
Philips Semiconductors Product specification
74LV244Octal buffer/line driver (3-State)
1998 May 20 8
DIP20: plastic dual in-line package; 20 leads (300 mil) SOT146-1
Philips Semiconductors Product specification
74LV244Octal buffer/line driver (3-State)
1998 May 20 9
SO20: plastic small outline package; 20 leads; body width 7.5 mm SOT163-1
Philips Semiconductors Product specification
74LV244Octal buffer/line driver (3-State)
1998 May 20 10
SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm SOT339-1
Philips Semiconductors Product specification
74LV244Octal buffer/line driver (3-State)
1998 May 20 11
TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4.4 mm SOT360-1
Philips Semiconductors Product specification
74LV244Octal buffer/line driver (3-State)
1998 May 20 12
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 appl iances, 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.
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.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone 800-234-7381
DEFINITIONS
Data Sheet Identification Product Status Definition
Objective Specification
Preliminary Specification
Product Specification
Formative or in Design
Preproduction Product
Full Production
This data sheet contains the design target or goal specifications for product development. Specifications
may change in any manner without notice.
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.
Copyright Philips Electronics North America Corporation 1998
All rights reserved. Printed in U.S.A.
print code Date of release: 05-96
Document order number: 9397-750-04437
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Information as of 2001-06-14
74LV244; Octal buffer/line driver (3-State)
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• Datasheet
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Description
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to
the
top
of
this
page
The 74LV244 is a low-voltage Si-gate CMOS device and is pin and function compatible with
74HC/HCT244.
The 74LV244 is an octal non-inverting buffer/line driver with 3-State outputs. The 3-State outputs are
controlled by the output enable inputs 1OE and 2OE. A HIGH on nOE causes the outputs to assume a
high impedance OFF-state. The 74LV244 is identical to the 74LV240 but has non-inverting outputs.
Features
Go
to
the
top
of
this
page
Wide operating voltage: 1.0 to 5.5 V● Optimized for low voltage applications: 1.0 to 3.6 V● Accepts TTL input levels between VCC = 2.7 V and VCC = 3.6 V●
Typical V OLP (output ground bounce) < 0.8 V at VCC = 3.3 VT amb = 25°C●
Typical V OHV (output V OH undershoot) > 2 V at VCC = 3.3 VT amb = 25°C●
Output capability: bus driver● ICC category: MSI●
Applications
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Live Insertion Aspects of Philips Logic Families (date 22-Jul-99)
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Hardware and software verification procedure (date 07-Oct-98)
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Ground And VCC Bounce Of High-Speed Integrated Circuits (date 01-Jan-93)
Datasheet
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Type nr. Title Publication
release date Datasheet status Page
count
File
size
(kB) Datasheet
74LV244 Octal buffer/line driver
(3-State) 20-May-98 Product
Specification 12 124
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Philips Semiconductors: Product information on 74LV244, Octal buffer/line driver (3-State)
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Partnumber North American
Partnumber Order code
(12nc)
marking/packing
Download
PDF
IC packing
info package device status buy online
74LV244D 74LV244D 9350 563 70112 Standard
Marking * Tube
SOT163
(SO20;
MS-013AC;
075E04)
Full production
order this
product online
-
74LV244D-T 9350 563 70118 Standard
Marking * Reel
Pack, SMD, 13"
SOT163
(SO20;
MS-013AC;
075E04)
Full production
order this
product online
-
74LV244DB 74LV244DB 9350 736 80112 Standard
Marking * Tube SOT339-1
(SSOP20) Full production
order this
product online
-
74LV244DB-T 9350 736 80118 Standard
Marking * Reel
Pack, SMD, 13"
SOT339-1
(SSOP20) Full production
order this
product online
-
74LV244N 74LV244N 9350 626 10112 Standard
Marking * Tube SOT146-1
(DIP20) Full production
order this
product online
-
74LV244PW 74LV244PW 9351 746 50112 Standard
Marking * Tube SOT360-1
(TSSOP20) Full production
order this
product online
-
74LV244PW-T 9351 746 50118 Standard
Marking * Reel
Pack, SMD, 13"
SOT360-1
(TSSOP20) Full production
order this
product online
-
74LV244U 74LV244CU 9352 212 10005
No Marking *
Chips on Wafer,
Pre-Sawn, On
FFC
- Full production
order this
product online
-
9352 212 10026 No Marking *
Die In Waffle
Carriers - Development -
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Philips Semiconductors: Product information on 74LV244, Octal buffer/line driver (3-State)
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