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SN54AHC16244, SN74AHC16244
SCLS327H – MARCH 1996 – REVISED OCTOBER 2014
SNx4AHC16244 16-Bit Buffers/Drivers With 3-State Outputs
1 Features
2 Applications
•
•
•
•
•
•
1
•
•
•
•
•
•
Members of the Texas Instruments
Widebus™ Family
EPIC™ (Enhanced-Performance Implanted
CMOS) Process
Operating Range 2-V to 5.5-V VCC
Distributed VCC and GND Pins Minimize
High-Speed Switching Noise
Flow-Through Architecture Optimizes PCB Layout
Latch-Up Performance Exceeds 250 mA Per
JESD 17
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
Motor Drives
Wireless Infrastructures
Health and Fitness Wearables
Telecom Infrastructures
Electronic Points of Sale
3 Description
The SNx4AHC16244 devices are 16-bit buffers and
line drivers designed specifically to improve the
performance and density of 3-state memory address
drivers, clock drivers, and bus-oriented receivers and
transmitters.
Device Information(1)
PART NUMBER
SNx4AHC16244
PACKAGE
BODY SIZE (NOM)
SSOP (48)
15.80 mm × 7.50 mm
TSSOP (48)
12.50 mm 6.10 mm
TVSOP (48)
9.70 mm 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Simplified Schematic
1OE
3OE
1A1
1Y1
3A1
3Y1
1A2
1Y2
3A2
3Y2
1A3
1Y3
3A3
3Y3
1A4
1Y4
3A4
3Y4
2OE
4OE
2A1
2Y1
4A1
4Y1
2A2
2Y2
4A2
4Y2
2A3
2Y3
4A3
4Y3
2A4
2Y4
4A4
4Y4
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. UNLESS OTHERWISE NOTED, this document contains PRODUCTION
DATA.
SN54AHC16244, SN74AHC16244
SCLS327H – MARCH 1996 – REVISED OCTOBER 2014
www.ti.com
Table of Contents
1
2
3
4
5
6
7
8
Features ..................................................................
Applications ...........................................................
Description .............................................................
Simplified Schematic.............................................
Revision History.....................................................
Pin Configuration and Functions .........................
Specifications.........................................................
1
1
1
1
2
3
5
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
7.10
5
5
5
6
6
7
7
7
8
8
Absolute Maximum Ratings ......................................
Handling Ratings.......................................................
Recommended Operating Conditions.......................
Thermal Information ..................................................
Electrical Characteristics...........................................
Switching Characteristics, VCC = 3.3 V ± 0.3 V ........
Switching Characteristics, VCC = 5 V ± 0.5 V ...........
Noise Characteristics ................................................
Operating Characteristics..........................................
Typical Characteristics ............................................
Parameter Measurement Information .................. 9
9
Detailed Description ............................................ 10
9.1
9.2
9.3
9.4
Overview .................................................................
Functional Block Diagram .......................................
Feature Description.................................................
Device Functional Modes........................................
10
10
11
11
10 Application and Implementation........................ 12
10.1 Application Information.......................................... 12
10.2 Typical Application ............................................... 12
11 Power Supply Recommendations ..................... 13
12 Layout................................................................... 13
12.1 Layout Guidelines ................................................. 13
12.2 Layout Example .................................................... 13
13 Device and Documentation Support ................. 14
13.1
13.2
13.3
13.4
Related Links ........................................................
Trademarks ...........................................................
Electrostatic Discharge Caution ............................
Glossary ................................................................
14
14
14
14
14 Mechanical, Packaging, and Orderable
Information ........................................................... 14
5 Revision History
Changes from Revision G (January 2000) to Revision H
Page
•
Updated document to new TI data sheet format. ................................................................................................................... 1
•
Deleted Ordering Information table. ....................................................................................................................................... 1
•
Added Applications. ................................................................................................................................................................ 1
•
Added Pin Functions table...................................................................................................................................................... 3
•
Added Pin Functions table...................................................................................................................................................... 4
•
Added Handling Ratings table. ............................................................................................................................................... 5
•
Changed MAX operating temperature to 125°C in Recommended Operating Conditions table. ......................................... 5
•
Added Thermal Information table. .......................................................................................................................................... 6
•
Added –40°C to 125°C range for SN74AHC16244 in Electrical Characteristics table........................................................... 6
•
Added TA = –40°C to 125°C for SN74AHC16244 in both Switching Characteristics tables. ................................................. 7
•
Added Typical Characteristics. ............................................................................................................................................... 8
•
Added Detailed Description section...................................................................................................................................... 10
•
Added Application and Implementation section.................................................................................................................... 12
•
Added Power Supply Recommendations and Layout sections............................................................................................ 13
2
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SCLS327H – MARCH 1996 – REVISED OCTOBER 2014
6 Pin Configuration and Functions
SN54AHC16244 . . . WD PACKAGE
SN74AHC16244 . . . DGG, DGV, OR DL PACKAGE
(TOP VIEW)
1OE
1Y1
1Y2
GND
1Y3
1Y4
VCC
2Y1
2Y2
GND
2Y3
2Y4
3Y1
3Y2
GND
3Y3
3Y4
VCC
4Y1
4Y2
GND
4Y3
4Y4
4OE
1
48
2
47
3
46
4
45
5
44
6
43
7
42
8
41
9
40
10
39
11
38
12
37
13
36
14
35
15
34
16
33
17
32
18
31
19
30
20
29
21
28
22
27
23
26
24
25
2OE
1A1
1A2
GND
1A3
1A4
VCC
2A1
2A2
GND
2A3
2A4
3A1
3A2
GND
3A3
3A4
VCC
4A1
4A2
GND
4A3
4A4
3OE
Pin Functions
PIN
I/O
DESCRIPTION
1OE
I
Output Enable 1
1Y1
O
1Y1 Output
3
1Y2
O
1Y2 Output
4
GND
—
Ground Pin
5
1Y3
O
1Y3 Output
6
1Y4
O
1Y4 Output
7
VCC
—
Power Pin
8
2Y1
O
2Y1 Output
9
2Y2
O
2Y2 Output
10
GND
—
Ground Pin
11
2Y3
O
2Y3 Output
12
2Y4
O
2Y4 Output
13
3Y1
O
3Y1 Output
14
3Y2
O
3Y2 Output
15
GND
—
Ground Pin
16
3Y3
O
3Y3 Output
17
3Y4
O
3Y4 Output
18
VCC
—
Power Pin
NO.
NAME
1
2
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SCLS327H – MARCH 1996 – REVISED OCTOBER 2014
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Pin Functions (continued)
PIN
4
I/O
DESCRIPTION
4Y1
O
4Y1 Output
4Y2
O
4Y2 Output
21
GND
—
Ground Pin
22
4Y3
O
4Y3 Output
23
4Y4
O
4Y4 Output
24
4OE
I
Output Enable 4
25
3OE
I
Output Enable 3
26
4A4
I
4A4 Input
27
4A3
I
4A3 Input
28
GND
—
29
4A2
I
4A2 Input
30
4A1
I
4A1 Input
31
VCC
—
Power Pin
32
3A4
I
3A4 Input
33
3A3
I
3A3 Input
34
GND
—
35
3A2
I
3A2 Input
36
3A1
I
3A1 Input
37
2A4
I
2A4 Input
38
2A3
I
2A3 Input
39
GND
—
40
2A2
I
2A2 Input
41
2A1
I
2A1 Input
42
VCC
—
Power Pin
43
1A4
I
1A4 Input
44
1A3
I
1A3 Input
45
GND
—
46
1A2
I
1A2 Input
47
1A1
I
1A1 Input
48
2OE
I
Output Enable 2
NO.
NAME
19
20
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Ground Pin
Ground Pin
Ground Pin
Ground Pin
Copyright © 1996–2014, Texas Instruments Incorporated
Product Folder Links: SN54AHC16244 SN74AHC16244
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SCLS327H – MARCH 1996 – REVISED OCTOBER 2014
7 Specifications
7.1 Absolute Maximum Ratings (1)
over operating free-air temperature range (unless otherwise noted)
VCC
MIN
MAX
Supply voltage range
–0.5
7
UNIT
V
(2)
–0.5
7
V
–0.5
VCC + 0.5
VI
Input voltage range
VO
Output voltage range (2)
IIK
Input clamp current
VI < 0
–20
mA
IOK
Output clamp current
VO < 0 or VO > VCC
±20
mA
IO
Continuous output current
VO = 0 to VCC
±25
mA
±75
mA
Continuous current through VCC or GND
(1)
(2)
V
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 and output voltage ratings may be exceeded if the input and output current ratings are observed.
7.2 Handling Ratings
Tstg
Storage temperature range
V(ESD)
(1)
Electrostatic discharge
Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all
pins (1)
MIN
MAX
UNIT
–65
150
°C
0
2000
V
JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
7.3 Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted) (1)
SN54AHC16244 (2)
VCC
Supply voltage
VIH
High-level input voltage
Low-level input voltage
MAX
MIN
MAX
2
5.5
2
5.5
VCC = 2 V
1.5
VCC = 3 V
2.1
2.1
3.85
3.85
VCC = 5.5 V
VIL
SN74AHC16244
MIN
V
1.5
V
VCC = 2 V
0.5
VCC = 3 V
0.9
0.9
1.65
1.65
VCC = 5.5 V
UNIT
0.5
V
VI
Input voltage
0
5.5
0
5.5
VO
Output voltage
0
VCC
0
VCC
V
–50
–50
µA
VCC = 3.3 V ± 0.3 V
–4
–4
VCC = 5 V ± 0.5 V
–8
–8
VCC = 2 V
VCC = 2 V
IOH
High-level output current
IOL
Low-level output current
∆t/∆v
Input transition rise or fall rate
TA
Operating free-air temperature
(1)
(2)
50
50
VCC = 3.3 V ± 0.3 V
4
4
VCC = 5 V ± 0.5 V
8
8
100
100
20
20
VCC = 3.3 V ± 0.3 V
VCC = 5 V ± 0.5 V
–55
125
–40
V
mA
µA
mA
ns/V
125
°C
All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs (SCBA004).
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7.4 Thermal Information
SN74AHC16244
THERMAL METRIC (1)
DGV
DL
DGG
48 PINS
48 PINS
48 PINS
RθJA
Junction-to-ambient thermal resistance
83.5
64.6
72.5
RθJC(top)
Junction-to-case (top) thermal resistance
35.7
34.5
26.8
RθJB
Junction-to-board thermal resistance
46.6
36.4
39.4
ψJT
Junction-to-top characterization parameter
4.3
11.1
2.6
ψJB
Junction-to-board characterization parameter
46.0
36.1
39.1
(1)
UNIT
°C/W
For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report (SPRA953).
7.5 Electrical Characteristics
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
SN54AHC16244 (1)
TA = 25°C
TYP
2V
1.9
2
1.9
1.9
1.9
3V
2.9
3
2.9
2.9
2.9
4.5 V
4.4
4.5
4.4
4.4
4.4
IOH = –4 mA
3V
2.58
2.48
2.48
2.48
IOH = –8 mA
4.5 V
3.94
VOH
MIN
MAX
3.8
MIN
MAX
–40°C to 125°C
SN74AHC16244
MIN
IOH = –50 µA
MAX
SN74AHC16244
3.8
MIN
UNIT
MAX
V
3.8
2V
0.1
0.1
0.1
0.1
3V
0.1
0.1
0.1
0.1
4.5 V
0.1
0.1
0.1
0.1
3V
0.36
0.5
0.44
0.44
IOL = 8 mA
4.5 V
0.36
0.5
0.44
0.44
II
VI = VCC or GND
0 V to
5.5 V
±0.1
(2)
±1
±1
µA
IOZ
VO = VCC or GND
5.5 V
±0.25
±2.5
±2.5
±2.5
µA
ICC
VI = VCC or GND, IO = 0
5.5 V
4
40
40
40
µA
Ci
VI = VCC or GND
5V
2
10
10
10
10
pF
Co
VO = VCC or GND
5V
3.5
IOL = 50 µA
VOL
IOL = 4 mA
(1)
(2)
6
±1
V
pF
Product Preview
On products compliant to MIL-PRF-38535, this parameter is not production tested at VCC = 0 V.
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SCLS327H – MARCH 1996 – REVISED OCTOBER 2014
7.6 Switching Characteristics, VCC = 3.3 V ± 0.3 V
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 3)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
MIN
tPLH
A
Y
CL = 15 pF
tPHL
tPZH
OE
Y
tPHZ
OE
Y
CL = 15 pF
tPLZ
tPLH
A
Y
CL = 50 pF
tPHL
tPZH
OE
Y
tPHZ
OE
Y
tsk(o)
(1)
(2)
(3)
MIN
MAX
MIN
MAX
MIN
MAX
5.8 (2)
8.4 (2)
1 (2)
10 (2)
1
10
1
11
(2)
(2)
(2)
10 (2)
1
10
1
11
8.4
1
ns
6.6 (2)
10.6 (2)
1 (2)
12.5 (2)
1
12.5
1
13.5
6.6 (2)
10.6 (2)
1 (2)
12.5 (2)
1
12.5
1
13.5
5 (2)
11.5 (2)
1 (2)
12.5 (2)
1
12.5
1
13.5
5 (2)
11.5 (2)
1 (2)
12.5 (2)
1
12.5
1
13.5
8.3
11.9
1
13.5
1
13.5
1
14.5
8.3
11.9
1
13.5
1
13.5
1
14.5
9.1
14.1
1
16
1
16
1
17
9.1
14.1
1
16
1
16
1
17
10.3
14
1
16
1
16
1
17
10.3
14
1
16
1
16
1
17
ns
ns
ns
CL = 50 pF
tPLZ
UNIT
MAX
ns
CL = 50 pF
tPZL
TA = –40°C to 125°C
SN74AHC16244
SN74AHC16244
TYP
5.8
CL = 15 pF
tPZL
SN54AHC16244 (1)
TA = 25°C
LOAD
CAPACITANCE
ns
1.5 (3)
CL = 50 pF
1.5
1.5
ns
Product Preview
On products compliant to MIL-PRF-38535, this parameter is not production tested.
On products compliant to MIL-PRF-38535, this parameter does not apply.
7.7 Switching Characteristics, VCC = 5 V ± 0.5 V
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 3)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
MIN
tPLH
A
Y
tPHL
tPZH
Y
OE
Y
tPLZ
tPLH
A
Y
tPHL
tPZH
OE
Y
tPZL
tPHZ
OE
Y
tPLZ
tsk(o)
(1)
(2)
(3)
CL = 15 pF
CL = 15 pF
CL = 50 pF
CL = 50 pF
CL = 50 pF
CL = 50 pF
TA = –40°C to 125°C
SN74AHC16244
SN74AHC16244
UNIT
TYP
MAX
MIN
MAX
MIN
MAX
MIN
MAX
3.9 (2)
6 (2)
1 (2)
7 (2)
1
6.5
1
7
3.9 (2)
6 (2)
1 (2)
7 (2)
1
6.5
1
7
(2)
(2)
(2)
(2)
4.7
OE
tPZL
tPHZ
CL = 15 pF
SN54AHC16244 (1)
TA = 25°C
LOAD
CAPACITANCE
7.3
1
8.5
ns
1
8.5
1
9.5
4.7 (2)
7.3 (2)
1 (2)
8.5 (2)
1
8.5
1
9.5
5 (2)
7.2 (2)
1 (2)
8.5 (2)
1
8.5
1
9
5 (2)
7.2 (2)
1 (2)
8.5 (2)
1
8.5
1
9
5.4
8
1
9
1
8.5
1
9
5.4
8
1
9
1
8.5
1
9
6.2
9.3
1
10.5
1
10.5
1
11.5
6.2
9.3
1
10.5
1
10.5
1
11.5
6.7
9.2
1
10.5
1
10.5
1
11
6.7
9.2
1
10.5
1
10.5
1
11
ns
ns
ns
ns
ns
1
(3)
1
1
ns
Product Preview
On products compliant to MIL-PRF-38535, this parameter is not production tested.
On products compliant to MIL-PRF-38535, this parameter does not apply.
7.8 Noise Characteristics
VCC = 5 V, CL = 50 pF, TA = 25°C (1)
PARAMETER
SN74AHC16244
MIN
TYP
MAX
UNIT
VOL(P)
Quiet output, maximum dynamic VOL
0.5
0.8
V
VOL(V)
Quiet output, minimum dynamic VOL
–0.2
–0.8
V
VOH(V)
Quiet output, minimum dynamic VOH
4.8
VIH(D)
High-level dynamic input voltage
VIL(D)
Low-level dynamic input voltage
(1)
V
3.5
V
1.5
V
Characteristics are for surface-mount packages only.
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7.9 Operating Characteristics
VCC = 5 V, TA = 25°C
PARAMETER
Cpd
TEST CONDITIONS
Power dissipation capacitance
No load,
f = 1 MHz
TYP
UNIT
10.5
pF
7.10 Typical Characteristics
5
9
TPD in ns
TPD in ns
8
4
7
TPD (ns)
TPD (ns)
6
3
2
5
4
3
2
1
1
0
-100
0
-50
0
50
Temperature (qC)
100
Figure 1. TPD vs Temperature (VCC = 5 V)
8
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150
0
1
2
D001
3
VCC (V)
4
5
6
D001
Figure 2. TPD vs VCC (TA = 25ºC)
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SCLS327H – MARCH 1996 – REVISED OCTOBER 2014
8 Parameter Measurement Information
From Output
Under Test
Test
Point
From Output
Under Test
RL = 1 kΩ
S1
VCC
Open
TEST
GND
CL
(see Note A)
CL
(see Note A)
S1
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
Open Drain
Open
VCC
GND
VCC
LOAD CIRCUIT FOR
3-STATE AND OPEN-DRAIN OUTPUTS
LOAD CIRCUIT FOR
TOTEM-POLE OUTPUTS
VCC
50% VCC
Timing Input
tw
tsu
VCC
Input
50% VCC
50% VCC
0V
th
VCC
50% VCC
Data Input
50% VCC
0V
0V
VOLTAGE WAVEFORMS
PULSE DURATION
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
VCC
50% VCC
Input
50% VCC
0V
tPLH
In-Phase
Output
tPHL
50% VCC
tPHL
Out-of-Phase
Output
VOH
50% VCC
VOL
Output
Waveform 1
S1 at VCC
(see Note B)
VOH
50% VCC
VOL
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
INVERTING AND NONINVERTING OUTPUTS
50% VCC
50% VCC
0V
tPLZ
tPZL
≈VCC
50% VCC
VOL + 0.3 V
VOL
tPHZ
tPZH
tPLH
50% VCC
VCC
Output
Control
Output
Waveform 2
S1 at GND
(see Note B)
50% VCC
VOH – 0.3 V
VOH
≈0 V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
LOW- AND HIGH-LEVEL ENABLING
NOTES: A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr ≤ 3 ns, tf ≤ 3 ns.
D. The outputs are measured one at a time with one input transition per measurement.
Figure 3. Load Circuit and Voltage Waveforms
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9 Detailed Description
9.1 Overview
The SNx4AHC16244 devices are 16-bit buffers and line drivers designed specifically to improve the performance
and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters
These devices can be used as four 4-bit buffers, two 8-bit buffers, or one 16-bit buffer. They provide true outputs
and symmetrical active-low output-enable (OE) inputs.
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pull-up
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. The
SN54AHC16244 is characterized for operation over the full military temperature range of –55°C to 125°C. The
SN74AHC16244 is characterized for operation from –40°C to 85°C.
9.2 Functional Block Diagram
1OE
3OE
1A1
1Y1
3A1
3Y1
1A2
1Y2
3A2
3Y2
1A3
1Y3
3A3
3Y3
1A4
1Y4
3A4
3Y4
2OE
4OE
2A1
2Y1
4A1
4Y1
2A2
2Y2
4A2
4Y2
2A3
2Y3
4A3
4Y3
2A4
2Y4
4A4
4Y4
Figure 4. Logic Diagram (Positive Logic)
10
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Functional Block Diagram (continued)
1OE
EN1
2OE
EN2
3OE
EN3
4OE
EN4
1
1A1
1
1Y1
1A2
1Y2
1A3
1Y3
1A4
1Y4
2A1
1
2Y1
2
2A2
2Y2
2A3
2Y3
2A4
2Y4
3A1
1
3Y1
3
3A2
3Y2
3A3
3Y3
3Y4
3A4
1
4A1
4
4Y1
4A2
4Y2
4A3
4Y3
4A4
4Y4
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
Figure 5. Logic Symbol
9.3 Feature Description
•
•
•
Wide operating voltage range
– Operates from 2 V to 5.5 V
Allows down voltage translation
– Inputs accept voltages up to 5.5 V
Slows edges rates, minimizing output ringing
9.4 Device Functional Modes
Table 1. Function Table
(Each 4-bit Buffer/Driver)
INPUTS
OE
A
OUTPUT
Y
L
H
H
L
L
L
H
X
High-Z
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10 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
10.1 Application Information
The SN74AHC16244 is a low-drive CMOS device that can be used for a multitude of applications where output
ringing is a concern. The low drive and slow edge rates will minimize overshoot and undershoot on the outputs.
The inputs are tolerant to 5.5 V at any valid VCC. This feature makes it ideal for translating down to the VCC level.
Figure 6 shows the reduction in ringing compared to higher-drive parts, such as AC.
10.2 Typical Application
Regulated 5 V
µC or
System Logic
OE
VCC
1A1
1Y1
1A4
µC
System Logic
LEDs
1Y4
GND
Figure 6. Application Diagram
10.2.1 Design Requirements
This device uses CMOS technology and has balanced output drive. Care should be taken to avoid bus
contention because it can drive currents that would exceed maximum limits. The high drive will also create fast
edges into light loads, so routing and load conditions should be considered to prevent ringing.
10.2.2 Detailed Design Procedure
1. Recommended input conditions:
– For rise time and fall time specifications, see (Δt/ΔV) in the Recommended Operating Conditions table.
– For specified high and low levels, see (VIH and VIL) in the Recommended Operating Conditions table.
– Inputs are overvoltage tolerant allowing them to go as high as 5.5 V at any valid VCC.
2. Recommend output conditions:
– Load currents should not exceed 25 mA per output and 75 mA total for the part.
– Outputs should not be pulled above VCC.
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SCLS327H – MARCH 1996 – REVISED OCTOBER 2014
Typical Application (continued)
10.2.3 Application Curves
Figure 7. Switching Characteristics Comparison
11 Power Supply Recommendations
The power supply can be any voltage between the Min and Max supply voltage rating located in the
Recommended Operating Conditions.
Each VCC terminal should have a good bypass capacitor to prevent power disturbance. For devices with a single
supply, a 0.1 μF capacitor is recommended. If there are multiple VCC terminals then 0.01 μF or 0.022 μF
capacitors are recommended for each power terminal. It is acceptable to parallel multiple bypass capacitors to
reject different frequencies of noise. 0.1 μF and 1.0 μF capacitors are commonly used in parallel. The bypass
capacitor should be installed as close to the power terminal as possible for the best results.
12 Layout
12.1 Layout Guidelines
When using multiple bit logic devices, inputs should not float. In many cases, functions or parts of functions of
digital logic devices are unused. Some examples are when only two inputs of a triple-input AND gate are used,
or only 3 of the 4-buffer gates are used. Such input pins should not be left unconnected because the undefined
voltages at the outside connections result in undefined operational states. Specified in Figure 8 are rules that
must be observed under all circumstances. All unused inputs of digital logic devices must be connected to a high
or low bias to prevent them from floating. The logic level that should be applied to any particular unused input
depends on the function of the device. Generally they will be tied to GND or VCC, whichever makes more sense
or is more convenient. It is generally acceptable to float outputs unless the part is a transceiver.
12.2 Layout Example
Vcc
Input
Unused Input
Output
Unused Input
Output
Input
Figure 8. Layout Diagram
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www.ti.com
13 Device and Documentation Support
13.1 Related Links
The table below lists quick access links. Categories include technical documents, support and community
resources, tools and software, and quick access to sample or buy.
Table 2. Related Links
PARTS
PRODUCT FOLDER
SAMPLE & BUY
TECHNICAL
DOCUMENTS
TOOLS &
SOFTWARE
SUPPORT &
COMMUNITY
SN54AHC16244
Click here
Click here
Click here
Click here
Click here
SN74AHC16244
Click here
Click here
Click here
Click here
Click here
13.2 Trademarks
Widebus is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
13.3 Electrostatic Discharge Caution
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
13.4 Glossary
SLYZ022 — TI Glossary.
This glossary lists and explains terms, acronyms, and definitions.
14 Mechanical, Packaging, and Orderable Information
The following pages include mechanical, packaging, and orderable information. This information is the most
current data available for the designated devices. This data is subject to change without notice and revision of
this document. For browser-based versions of this data sheet, refer to the left-hand navigation.
14
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PACKAGE OPTION ADDENDUM
www.ti.com
14-Oct-2022
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
Samples
(4/5)
(6)
74AHC16244DGGRG4
ACTIVE
TSSOP
DGG
48
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
AHC16244
Samples
SN74AHC16244DGGR
ACTIVE
TSSOP
DGG
48
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
AHC16244
Samples
SN74AHC16244DGVR
ACTIVE
TVSOP
DGV
48
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
HE244
Samples
SN74AHC16244DL
ACTIVE
SSOP
DL
48
25
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
AHC16244
Samples
SN74AHC16244DLR
ACTIVE
SSOP
DL
48
1000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 125
AHC16244
Samples
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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