ON MC74LCX244 Low-voltage cmos octal buffer Datasheet

MC74LCX244
Low-Voltage CMOS Octal
Buffer
With 5 V−Tolerant Inputs and Outputs
(3−State, Non−Inverting)
The MC74LCX244 is a high performance, non−inverting octal
buffer operating from a 2.3 to 3.6 V supply. High impedance TTL
compatible inputs significantly reduce current loading to input drivers
while TTL compatible outputs offer improved switching noise
performance. A VI specification of 5.5 V allows MC74LCX244 inputs
to be safely driven from 5 V devices. The MC74LCX244 is suitable
for memory address driving and all TTL level bus oriented transceiver
applications.
Current drive capability is 24 mA at the outputs. The Output Enable
(OE) input, when HIGH, disables the output by placing them in
a HIGH Z condition.
Features
•
•
•
•
•
•
•
•
•
•
•
Designed for 2.3 to 3.6 V VCC Operation
5 V Tolerant − Interface Capability With 5 V TTL Logic
Supports Live Insertion and Withdrawal
IOFF Specification Guarantees High Impedance When VCC = 0 V
LVTTL Compatible
LVCMOS Compatible
24 mA Balanced Output Sink and Source Capability
Near Zero Static Supply Current in All Three Logic States (10 mA)
Substantially Reduces System Power Requirements
Latchup Performance Exceeds 500 mA
ESD Performance:
♦ Human Body Model >2000 V
♦ Machine Model >200 V
These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
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MARKING
DIAGRAMS
20
20
1
LCX244
AWLYYWWG
SOIC−20 WB
DW SUFFIX
CASE 751D
1
20
20
LCX
244
ALYW G
G
1
TSSOP−20
DT SUFFIX
CASE 948E
1
1
LCX
244
ALYWG
G
QFN20
MN SUFFIX
CASE 485AA
A
L, WL
Y, YY
W, WW
G or G
=
=
=
=
=
Assembly Location
Wafer Lot
Year
Work Week
Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 6 of this data sheet.
© Semiconductor Components Industries, LLC, 2012
July, 2012 − Rev. 11
1
Publication Order Number:
MC74LCX244/D
MC74LCX244
VCC
2OE
1O0
2D0
1O1
2D1
1O2
2D2
1O3
2D3
20
19
18
17
16
15
14
13
12
11
1OE
1D0
1D1
1
2
3
4
5
6
7
8
9
10
1OE
1D0
2O0
1D1
2O1
1D2
2O2
1D3
2O3
GND
1D2
1D3
19
1
2
18
4
16
6
14
8
12
1O0
1O1
1O2
1O3
12
11
20
QFN
PIN #1
2OE
19
10
2D0
2
9
2D1
17
3
15
5
13
7
11
9
2O0
2O1
Figure 1. Pinouts: 20−Lead (Top View)
2D2
PIN NAMES
PINS
FUNCTION
2D3
nOE
Output Enable Inputs
1Dn, 2Dn
Data Inputs
1On, 2On
3−State Outputs
1OE
2OE
OUTPUTS
1Dn
2Dn
1On, 2On
L
L
L
L
H
H
H
X
Z
2O3
Figure 2. Logic Diagram
TRUTH TABLE
INPUTS
2O2
H = High Voltage Level
L = Low Voltage Level
Z = High Impedance State
X = High or Low Voltage Level and Transitions are Acceptable
For ICC reasons, DO NOT FLOAT Inputs
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2
MC74LCX244
MAXIMUM RATINGS
Symbol
VCC
Parameter
Value
DC Supply Voltage
Condition
Units
−0.5 to +7.0
V
V
VI
DC Input Voltage
−0.5 ≤ VI ≤ +7.0
VO
DC Output Voltage
−0.5 ≤ VO ≤ +7.0
Output in 3−State
V
−0.5 ≤ VO ≤ VCC + 0.5
Output in HIGH or LOW State (Note 1)
V
IIK
DC Input Diode Current
−50
VI < GND
mA
IOK
DC Output Diode Current
−50
VO < GND
mA
+50
VO > VCC
mA
IO
DC Output Source/Sink Current
±50
mA
ICC
DC Supply Current Per Supply Pin
±100
mA
±100
mA
−65 to +150
°C
IGND
DC Ground Current Per Ground Pin
TSTG
Storage Temperature Range
MSL
Moisture Sensitivity
Level 1
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. IO absolute maximum rating must be observed.
RECOMMENDED OPERATING CONDITIONS
Symbol
VCC
Parameter
Supply Voltage
Operating
Data Retention Only
Min
Typ
Max
2.0
1.5
2.5, 3.3
2.5, 3.3
3.6
3.6
VI
Input Voltage
0
5.5
VO
Output Voltage
HIGH or LOW State
3−State
0
0
VCC
5.5
IOH
HIGH Level Output Current
VCC = 3.0 V − 3.6 V
VCC = 2.7 V − 3.0 V
−24
−12
IOL
LOW Level Output Current
VCC = 3.0 V − 3.6 V
VCC = 2.7 V − 3.0 V
24
12
TA
Operating Free−Air Temperature
Dt/DV
Input Transition Rise or Fall Rate, VIN from 0.8 V to 2.0 V, VCC = 3.0 V
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3
Units
V
V
V
mA
mA
−55
+125
°C
0
10
ns/V
MC74LCX244
DC ELECTRICAL CHARACTERISTICS
TA = −55°C to +125°C
Symbol
Characteristic
VIH
HIGH Level Input Voltage (Note 2)
VIL
LOW Level Input Voltage (Note 2)
VOH
HIGH Level Output Voltage
Condition
Min
2.3 V ≤ VCC ≤ 2.7 V
1.7
2.7 V ≤ VCC ≤ 3.6 V
2.0
Max
V
2.3 V ≤ VCC ≤ 2.7 V
0.7
2.7 V ≤ VCC ≤ 3.6 V
VOL
LOW Level Output Voltage
IOZ
3−State Output Current
IOFF
Power Off Leakage Current
IIN
Input Leakage Current
ICC
Quiescent Supply Current
DICC
Increase in ICC per Input
Units
V
0.8
2.3 V ≤ VCC ≤ 3.6 V; IOL = 100 mA
VCC − 0.2
VCC = 2.3 V; IOH = −8 mA
1.8
VCC = 2.7 V; IOH = −12 mA
2.2
VCC = 3.0 V; IOH = −18 mA
2.4
VCC = 3.0 V; IOH = −24 mA
2.2
V
2.3 V ≤ VCC ≤ 3.6 V; IOL = 100 mA
0.2
VCC = 2.3 V; IOL = 8 mA
0.6
VCC = 2.7 V; IOL = 12 mA
0.4
VCC = 3.0 V; IOL = 16 mA
0.4
V
VCC = 3.0 V; IOL = 24 mA
0.55
VCC = 3.6 V, VIN = VIH or VIL,
VOUT = 0 to 3.6 V
±5
mA
VCC = 0, VIN = 3.6 V or VOUT = 3.6 V
10
mA
VCC = 0 to 3.6 V, VIN = 3.6 V or GND
±5
mA
VCC = 3.6 V, VIN = 3.6 V or VOUT = 3.6 V
10
mA
2.3 ≤ VCC ≤ 3.6 V; VIH = VCC − 0.6 V
500
mA
2. These values of VI are used to test DC electrical characteristics only.
AC CHARACTERISTICS (tR = tF = 2.5 ns; RL = 500 W)
Limits
TA = −55°C to +125°C
VCC = 3.0 V to 3.6 V
CL = 50 pF
Symbol
Parameter
VCC = 2.7 V
CL = 50 pF
VCC = 2.5 V ± 0.2
CL = 30 pF
Waveform
Min
Max
Min
Max
Min
Max
Units
tPLH
tPHL
Propagation Delay
Input to Output
1
1.5
1.5
6.5
6.5
1.5
1.5
7.5
7.5
1.5
1.5
7.8
7.8
ns
tPZH
tPZL
Output Enable Time to
High and Low Level
2
1.5
1.5
8.0
8.0
1.5
1.5
9.0
9.0
1.5
1.5
10
10
ns
tPHZ
tPLZ
Output Disable Time From
High and Low Level
2
1.5
1.5
7.0
7.0
1.5
1.5
8.0
8.0
1.5
1.5
8.4
8.4
ns
tOSHL
tOSLH
Output−to−Output Skew
(Note 3)
1.0
1.0
ns
3. Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device.
The specification applies to any outputs switching in the same direction, either HIGH−to−LOW (tOSHL) or LOW−to−HIGH (tOSLH); parameter
guaranteed by design.
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4
MC74LCX244
DYNAMIC SWITCHING CHARACTERISTICS
TA = +25°C
Symbol
Characteristic
Condition
Min
Typ
Max
Units
VOLP
Dynamic LOW Peak Voltage (Note 4)
VCC = 3.3 V, CL = 50 pF, VIH = 3.3 V, VIL = 0 V
VCC = 2.5 V, CL = 30 pF, VIH = 2.5 V, VIL = 0 V
0.8
0.6
V
VOLV
Dynamic LOW Valley Voltage (Note 4)
VCC = 3.3 V, CL = 50 pF, VIH = 3.3 V, VIL = 0 V
VCC = 2.5 V, CL = 30 pF, VIH = 2.5 V, VIL = 0 V
−0.8
−0.6
V
4. Number of outputs defined as “n”. Measured with “n−1” outputs switching from HIGH−to−LOW or LOW−to−HIGH. The remaining output is
measured in the LOW state.
CAPACITIVE CHARACTERISTICS
Symbol
CIN
Parameter
Condition
Typical
Units
VCC = 3.3 V, VI = 0 V or VCC
7
pF
VCC = 3.3 V, VI = 0 V or VCC
8
pF
10 MHz, VCC = 3.3 V, VI = 0 V or VCC
25
pF
Input Capacitance
COUT
Output Capacitance
CPD
Power Dissipation Capacitance
VCC
Vmi
1Dn, 2Dn
Vmi
0V
tPLH
tPHL
VOH
Vmo
1On, 2On
Vmo
VOL
WAVEFORM 1 − PROPAGATION DELAYS
tR = tF = 2.5 ns, 10% to 90%; f = 1 MHz; tW = 500 ns
VCC
Vmi
1OE, 2OE
Vmi
0V
tPZH
tPHZ
VCC
VOH - 0.3 V
Vmo
1On, 2On
≈0V
tPZL
tPLZ
≈ 3.0 V
Vmo
1On, 2On
VOL + 0.3 V
GND
WAVEFORM 2 − OUTPUT ENABLE AND DISABLE TIMES
tR = tF = 2.5 ns, 10% to 90%; f = 1 MHz; tW = 500 ns
Figure 3. AC Waveforms
VCC
Symbol
3.3 V ± 0.3 V
2.7 V
2.5 V ± 0.2 V
Vmi
1.5 V
1.5 V
VCC/2
Vmo
1.5 V
1.5 V
VCC/2
VHZ
VOL + 0.3 V
VOL + 0.3 V
VOL + 0.15 V
VLZ
VOH − 0.3 V
VOH − 0.3 V
VOH − 015 V
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5
MC74LCX244
VCC
PULSE
GENERATOR
DUT
RT
CL
RL
TEST
SWITCH
tPLH, tPHL
Open
tPZL, tPLZ
6 V at VCC = 3.3 ± 0.3 V
6 V at VCC = 2.5 ± 0.2 V
Open Collector/Drain tPLH and tPHL
6V
tPZH, tPHZ
GND
CL =
CL =
RL =
RT =
6V
OPEN
GND
R1
50 pF at VCC = 3.3 ± 0.3 V or equivalent (includes jig and probe capacitance)
30 pF at VCC = 2.5 ± 0.2 V or equivalent (includes jig and probe capacitance)
R1 = 500 W or equivalent
ZOUT of pulse generator (typically 50 W)
Figure 4. Test Circuit
ORDERING INFORMATION
Package
Shipping†
MC74LCX244DWG
SOIC−20 WB
(Pb−Free)
38 Units / Rail
MC74LCX244DWR2G
SOIC−20 WB
(Pb−Free)
1000 / Tape & Reel
MC74LCX244DTG
TSSOP−20
(Pb−Free)
75 Units / Rail
MC74LCX244DTR2G
TSSOP−20
(Pb−Free)
2500 / Tape & Reel
MC74LCX244MNTWG
QFN20
(Pb−Free)
3000 / Tape & Reel
Device
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
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6
MC74LCX244
PACKAGE DIMENSIONS
SOIC−20 WB
CASE 751D−05
ISSUE G
A
20
q
X 45 _
E
h
1
10
20X
B
B
0.25
M
T A
S
B
S
A
L
H
M
10X
0.25
NOTES:
1. DIMENSIONS ARE IN MILLIMETERS.
2. INTERPRET DIMENSIONS AND TOLERANCES
PER ASME Y14.5M, 1994.
3. DIMENSIONS D AND E DO NOT INCLUDE MOLD
PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE.
5. DIMENSION B DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE PROTRUSION
SHALL BE 0.13 TOTAL IN EXCESS OF B
DIMENSION AT MAXIMUM MATERIAL
CONDITION.
11
B
M
D
18X
e
A1
SEATING
PLANE
C
T
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7
DIM
A
A1
B
C
D
E
e
H
h
L
q
MILLIMETERS
MIN
MAX
2.35
2.65
0.10
0.25
0.35
0.49
0.23
0.32
12.65
12.95
7.40
7.60
1.27 BSC
10.05
10.55
0.25
0.75
0.50
0.90
0_
7_
MC74LCX244
PACKAGE DIMENSIONS
TSSOP−20
CASE 948E−02
ISSUE C
20X
0.15 (0.006) T U
2X
L
K REF
0.10 (0.004)
S
L/2
20
M
T U
S
V
K
K1
ÍÍÍÍ
ÍÍÍÍ
ÍÍÍÍ
S
J J1
11
B
−U−
PIN 1
IDENT
SECTION N−N
0.25 (0.010)
N
1
10
M
0.15 (0.006) T U
S
A
−V−
N
F
DETAIL E
C
G
D
H
DETAIL E
0.100 (0.004)
−T− SEATING
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION:
MILLIMETER.
3. DIMENSION A DOES NOT INCLUDE
MOLD FLASH, PROTRUSIONS OR GATE
BURRS. MOLD FLASH OR GATE BURRS
SHALL NOT EXCEED 0.15 (0.006) PER SIDE.
4. DIMENSION B DOES NOT INCLUDE
INTERLEAD FLASH OR PROTRUSION.
INTERLEAD FLASH OR PROTRUSION
SHALL NOT EXCEED 0.25 (0.010) PER SIDE.
5. DIMENSION K DOES NOT INCLUDE
DAMBAR PROTRUSION. ALLOWABLE
DAMBAR PROTRUSION SHALL BE 0.08
(0.003) TOTAL IN EXCESS OF THE K
DIMENSION AT MAXIMUM MATERIAL
CONDITION.
6. TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
7. DIMENSION A AND B ARE TO BE
DETERMINED AT DATUM PLANE −W−.
MILLIMETERS
INCHES
DIM MIN
MAX
MIN
MAX
A
6.40
6.60
0.252
0.260
B
4.30
4.50
0.169
0.177
C
--1.20
--0.047
D
0.05
0.15
0.002
0.006
F
0.50
0.75
0.020
0.030
G
0.65 BSC
0.026 BSC
−W−
H
0.27
0.37
0.011
0.015
J
0.09
0.20
0.004
0.008
J1
0.09
0.16
0.004
0.006
K
0.19
0.30
0.007
0.012
K1
0.19
0.25
0.007
0.010
L
6.40 BSC
0.252 BSC
M
0_
8_
0_
8_
PLANE
SOLDERING FOOTPRINT
7.06
1
0.65
PITCH
16X
0.36
16X
1.26
DIMENSIONS: MILLIMETERS
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8
MC74LCX244
PACKAGE DIMENSIONS
QFN20, 2.5x4.5 MM
CASE 485AA−01
ISSUE B
D
PIN ONE REFERENCE
A
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ASME Y14.5M, 1994.
2. CONTROLLING DIMENSION: MILLIMETERS.
3. DIMENSIONS b APPLIES TO PLATED
TERMINAL AND IS MEASURED BETWEEN
0.25 AND 0.30 MM FROM TERMINAL.
4. COPLANARITY APPLIES TO THE EXPOSED
PAD AS WELL AS THE TERMINALS.
B
ÉÉÉ
ÉÉÉ
ÉÉÉ
ÉÉÉ
DIM
A
A1
A3
b
D
D2
E
E2
e
K
L
E
2X
0.15 C
2X
0.15 C
TOP VIEW
MILLIMETERS
MIN
MAX
0.80
1.00
0.00
0.05
0.20 REF
0.20
0.30
2.50 BSC
0.85
1.15
4.50 BSC
2.85
3.15
0.50 BSC
0.20
--0.35
0.45
0.10 C
A
20X
0.08 C
(A3)
A1
SIDE VIEW
C
SEATING
PLANE
D2
11
20X
L
e
9
12
e
E2
20X
b
0.10 C A B
0.05 C
NOTE 3
19
2
1
20
20X
K
BOTTOM VIEW
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