Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
SN74LVC2244A
SCAS572L – APRIL 1996 – REVISED JULY 2014
SN74LVC2244A Octal Buffer/Driver With 3-State Outputs
1 Features
•
•
•
•
1
2 Applications
•
•
•
•
Wearable Health and Fitness Devices
Network Switches
Servers
Tests and Measurements
•
•
•
•
•
•
Operates From 1.65 V to 3.6 V
Inputs Accept Voltages to 5.5 V
Max t
pd
of 5.5 ns at 3.3 V
Output Ports Have Equivalent 26-Ω Series
Resistors, So No External Resistors Are Required
Typical V
OLP
(Output Ground Bounce)
<0.8 V at V
CC
= 3.3 V, T
A
= 25°C
Typical V
OHV
(Output V
OH
Undershoot)
>2 V at V
CC
= 3.3 V, T
A
= 25°C
Supports Mixed-Mode Signal Operation on All
Ports (5-V Input/Output Voltage
With 3.3-V V
CC
)
I
off
Supports Live Insertion, Partial-Power-Down
Mode, and Back-Drive Protection
Latch-Up Performance Exceeds 250 mA Per
JESD 17
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
3 Description
The SN74LVC2244A octal buffer/line driver
designed for 1.65-V to 3.6-V V
CC
operation.
Device Information
(1)
PART NUMBER
PACKAGE
SSOP (20)
SSOP (20)
SN74LVC2244A
TVSOP (20)
SOIC (20)
TSSOP (20)
BODY SIZE (NOM)
7.20 mm × 5.30 mm
8.65 mm × 3.90 mm
5.00 mm × 4.40 mm
12.80 mm × 7.50 mm
6.50 mm × 4.40 mm
is
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Simplified Schematic
1OE
1
2OE
19
1A1
2
18
1Y1
2A1
11
9
2Y1
1A2
4
16
1Y2
2A2
13
7
2Y2
1A3
6
14
1Y3
2A3
15
5
2Y3
1A4
8
12
1Y4
2A4
17
3
2Y4
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
SN74LVC2244A
SCAS572L – APRIL 1996 – REVISED JULY 2014
www.ti.com
Table of Contents
1
2
3
4
5
6
7
Features
..................................................................
Applications
...........................................................
Description
.............................................................
Simplified Schematic.............................................
Revision History.....................................................
Pin Configuration and Functions
.........................
Specifications.........................................................
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
Absolute Maximum Ratings .....................................
Handling Ratings.......................................................
Recommended Operating Conditions ......................
Thermal Information ..................................................
Electrical Characteristics...........................................
Switching Characteristics, –40°C to 85°C.................
Switching Characteristics, –40°C to 125°C...............
Operating Characteristics..........................................
Typical Characteristics ..............................................
1
1
1
1
2
3
4
4
4
5
5
6
6
6
7
7
9
Detailed Description
..............................................
9
9.1
9.2
9.3
9.4
Overview ...................................................................
Functional Block Diagram .........................................
Feature Description...................................................
Device Functional Modes..........................................
9
9
9
9
10 Application and Implementation........................
10
10.1 Application Information..........................................
10
10.2 Typical Application ...............................................
10
11 Power Supply Recommendations
.....................
11
12 Layout...................................................................
11
12.1 Layout Guidelines .................................................
11
12.2 Layout Example ....................................................
11
13 Device and Documentation Support
.................
12
13.1 Trademarks ...........................................................
12
13.2 Electrostatic Discharge Caution ............................
12
13.3 Glossary ................................................................
12
8
Parameter Measurement Information
..................
8
14 Mechanical, Packaging, and Orderable
Information
...........................................................
12
5 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision K (March 2005) to Revision L
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Page
Updated document to new TI data sheet standards. .............................................................................................................
1
Deleted Ordering Information table. .......................................................................................................................................
1
Changed I
off
bullet in Features list. .........................................................................................................................................
1
Added Applications. ................................................................................................................................................................
1
Added Pin Functions table......................................................................................................................................................
3
Added Handling Ratings table. ...............................................................................................................................................
4
Changed MAX ambient temperature to 125°C in Recommended Operating Conditions. ....................................................
5
Added Thermal Information table. ..........................................................................................................................................
5
Added –40°C to 125°C temperature range in Electrical Characteristics table. ......................................................................
6
Added data to Switching Characteristics, –40°C to 85°C.......................................................................................................
6
Added Switching Characteristics table, –40°C to 125°C. ......................................................................................................
6
Changed Operating Characteristics table...............................................................................................................................
7
Added Typical Characteristics. ...............................................................................................................................................
7
Added Detailed Description section........................................................................................................................................
9
Added Application and Implementation section....................................................................................................................
10
2
Submit Documentation Feedback
Product Folder Links:
SN74LVC2244A
Copyright © 1996–2014, Texas Instruments Incorporated
SN74LVC2244A
www.ti.com
SCAS572L – APRIL 1996 – REVISED JULY 2014
6 Pin Configuration and Functions
DB, DBQ, DGV, DW, NS, OR PW PACKAGE
(TOP VIEW)
1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
CC
2OE
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1
Pin Functions
PIN
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
NAME
1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
2A1
1Y4
2A2
1Y3
2A3
1Y2
2A4
1Y1
2OE
VCC
I/O
I
I
O
I
O
I
O
I
O
—
I
O
I
O
I
O
I
O
I
—
DESCRIPTION
Output Enable 1
1A1 Input
2Y4 Output
1A2 Input
2Y3 Output
1A3 Input
2Y2 Output
1A4 Input
2Y1 Output
Ground Pin
2A1 Input
1Y4 Output
2A2 Input
1Y3 Output
2A3 Input
1Y2 Output
2A4 Input
1Y1 Output
Output Enable 2
Power Pin
Copyright © 1996–2014, Texas Instruments Incorporated
Submit Documentation Feedback
Product Folder Links:
SN74LVC2244A
3
SN74LVC2244A
SCAS572L – APRIL 1996 – REVISED JULY 2014
www.ti.com
7 Specifications
7.1 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)
(1)
MIN
V
CC
V
I
V
O
V
O
I
IK
I
OK
I
O
Supply voltage range
Input voltage range
(2)
MAX
6.5
6.5
6.5
V
CC
+ 0.5
–50
–50
±50
±100
UNIT
V
V
V
V
mA
mA
mA
mA
–0.5
–0.5
–0.5
–0.5
(2) (3)
Voltage range applied to any output in the high-impedance or power-off state
(2)
Voltage range applied to any output in the high or low state
Input clamp current
Output clamp current
Continuous output current
Continuous current through V
CC
or GND
V
I
< 0
V
O
< 0
(1)
(2)
(3)
Stresses beyond those listed under
Absolute Maximum Ratings
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.
The input negative-voltage and output voltage ratings may be exceeded if the input and output current ratings are observed.
The value of V
CC
is provided in the
Recommended Operating Conditions
table.
7.2 Handling Ratings
MIN
T
stg
Storage temperature range
Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all
pins
(1)
Charged device model (CDM), per JEDEC specification
JESD22-C101, all pins
(2)
–65
0
0
MAX
150
2000
V
1000
UNIT
°C
V
(ESD)
Electrostatic discharge
(1)
(2)
JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.
4
Submit Documentation Feedback
Product Folder Links:
SN74LVC2244A
Copyright © 1996–2014, Texas Instruments Incorporated
SN74LVC2244A
www.ti.com
SCAS572L – APRIL 1996 – REVISED JULY 2014
7.3 Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
(1)
MIN
V
CC
Supply voltage
Operating
Data retention only
V
CC
= 1.65 V to 1.95 V
V
IH
High-level input voltage
V
CC
= 2.3 V to 2.7 V
V
CC
= 2.7 V to 3.6 V
V
CC
= 1.65 V to 1.95 V
V
IL
V
I
V
O
Low-level input voltage
Input voltage
Output voltage
High or low state
3-state
V
CC
= 1.65 V
I
OH
High-level output current
V
CC
= 2.3 V
V
CC
= 2.7 V
V
CC
= 3 V
V
CC
= 1.65 V
I
OL
Low-level output current
V
CC
= 2.3 V
V
CC
= 2.7 V
V
CC
= 3 V
Δt/Δv
T
A
(1)
Input transition rise or fall rate
Operating free-air temperature
–40
V
CC
= 2.3 V to 2.7 V
V
CC
= 2.7 V to 3.6 V
0
0
0
1.65
1.5
0.65 × V
CC
1.7
2
0.35 × V
CC
0.7
0.8
5.5
V
CC
5.5
–2
–4
–8
–12
2
4
8
12
10
125
ns/V
°C
mA
mA
V
V
V
V
MAX
3.6
UNIT
V
All unused inputs of the device must be held at V
CC
or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs
(SCBA004).
7.4 Thermal Information
SN74LVC2244A
THERMAL METRIC
R
θJA
R
θJC(top)
R
θJB
ψ
JT
ψ
JB
R
θJC(bot)
(1)
(1)
DB
94.5
56.2
49.7
18.1
49.5
n/a
DBQ
94.7
47.9
45.0
11.0
44.6
n/a
DGV
20 PINS
114.7
29.8
56.2
0.8
55.5
n/a
DW
88.3
51.1
50.9
20.0
50.5
n/a
NS
74.7
40.5
42.3
14.3
41.9
n/a
PW
102.5
35.9
53.5
2.2
52.9
n/a
UNIT
Junction-to-ambient thermal resistance
Junction-to-case (top) thermal resistance
Junction-to-board thermal resistance
Junction-to-top characterization parameter
Junction-to-board characterization
parameter
Junction-to-case (bottom) thermal
resistance
°C/W
For more information about traditional and new thermal metrics, see the
IC Package Thermal Metrics
application report (SPRA953).
Copyright © 1996–2014, Texas Instruments Incorporated
Submit Documentation Feedback
Product Folder Links:
SN74LVC2244A
5
stm32/stm8
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
