SN74AS639N3 [TI]
AS SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PDIP20;
| 型号： | SN74AS639N3 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | AS SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PDIP20 光电二极管 输出元件 逻辑集成电路 |
| 文件： | 总15页 (文件大小：688K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN74ALS638A, SN74ALS639A, SN74AS638A, SN74AS639
OCTAL BUS TRANSCEIVERS
SDAS123A – DECEMBER 1983 – REVISED JANUARY 1995
DW OR N PACKAGE
(TOP VIEW)
• Bidirectional Bus Transceivers in
High-Density 20-Pin Packages
• Choice of True or Inverting Logic
DIR
A1
A2
A3
A4
A5
A6
A7
A8
V
CC
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
• A-Bus Outputs Are Open Collector;
OE
B1
B2
B3
B4
B5
B-Bus Outputs Are 3 State
• Package Options Include Plastic
Small-Outline (DW) Packages and
Standard Plastic (N) 300-mil DIPs
A
B
13 B6
12 B7
DEVICE
LOGIC
OUTPUT
OUTPUT
SN74ALS638A, SN74AS638A Open collector
3 state
Inverting
True
11
GND
B8
SN74ALS639A, SN74AS639
Open collector
3 state
description
These octal bus transceivers are designed for asynchronous two-way communication between open-collector
and 3-state buses. The devices transmit data from the A bus (open-collector) to the B bus (3 state) or from the
B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (OE) input
can be used to disable the device so the buses are isolated.
The -1 version of SN74ALS638A is identical to the standard version, except that the recommended maximum
I
is increased to 48 mA.
OL
The SN74ALS638A, SN74ALS639A, SN74AS638A, and SN74AS639 are characterized for operation from 0°C
to 70°C.
FUNCTION TABLE
INPUTS
OPERATION
SN74ALS638A
SN74ALS639A
SN74AS639
OE
DIR
SN74AS638A
B data to A bus
A data to B bus
Isolation
L
L
L
H
X
B data to A bus
A data to B bus
Isolation
H
Copyright 1995, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN74ALS638A, SN74ALS639A, SN74AS638A, SN74AS639
OCTAL BUS TRANSCEIVERS
SDAS123A – DECEMBER 1983 – REVISED JANUARY 1995
†
logic symbols
SN74ALS638A, SN74AS638A
SN74ALS639A, SN74AS639
G3
19
1
19
1
G3
OE
OE
DIR
3 EN1 [BA]
3 EN2 [AB]
DIR
3 EN1 [BA]
3 EN2 [AB]
2
18
2
18
A1
B1
A1
B1
1
1
2
2
3
4
5
6
7
8
9
17
16
15
14
13
12
11
3
4
5
6
7
8
9
17
16
15
14
13
12
11
A2
A3
A4
A5
A6
A7
A8
B2
B3
B4
B5
B6
B7
B8
A2
A3
A4
A5
A6
A7
A8
B2
B3
B4
B5
B6
B7
B8
†
These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
logic diagrams (positive logic)
SN74ALS638A, SN74AS638A
SN74ALS639A, SN74AS639
19
19
OE
OE
1
1
2
DIR
DIR
A1
2
18
18
A1
B1
B1
To Seven Other Transceivers
To Seven Other Transceivers
‡
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
CC
Input voltage, V : All inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
I
A-bus I/O ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
B-bus I/O ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V
Operating free-air temperature range, T : SN74ALS638A, SN74ALS639A . . . . . . . . . . . . . . . . . 0°C to 70°C
A
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
‡
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.
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN74ALS638A, SN74ALS639A, SN74AS638A, SN74AS639
OCTAL BUS TRANSCEIVERS
SDAS123A – DECEMBER 1983 – REVISED JANUARY 1995
recommended operating conditions
SN74ALS638A
SN74ALS639A
UNIT
MIN NOM
MAX
V
V
V
V
Supply voltage
4.5
2
5
5.5
V
V
CC
High-level input voltage
Low-level input voltage
High-level output voltage
High-level output current
IH
0.8
5.5
–15
24
V
IL
A ports
B ports
V
OH
I
mA
OH
I
Low-level output current
A or B ports
mA
OL
†
48
70
T
A
Operating free-air temperature
0
°C
†
Applies only to the SN74ALS638A-1 version and only if V
is between 4.75 V and 5.25 V
CC
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN74ALS638A
SN74ALS639A
PARAMETER
TEST CONDITIONS
UNIT
‡
MIN TYP
MAX
–1.5
0.1
V
V
V
V
= 4.5 V,
I = –18 mA
V
IK
CC
CC
CC
I
I
A ports
B ports
= 4.5 V,
V
OH
= 5.5 V
mA
OH
= 4.5 V to 5.5 V,
I
I
I
I
I
I
= –0.4 mA
= –3 mA
= –15 mA
= 12 mA
V
–2
OH
OH
OH
OL
OL
OL
CC
2.4
V
V
3.2
V
V
OH
V
CC
= 4.5 V
= 4.5 V
2
0.25
0.35
0.35
0.4
0.5
0.5
0.1
0.1
20
A or B ports
V
CC
= 24 mA
OL
†
= 48 mA
Control inputs
A or B ports
V = 7 V
I
I
I
V
V
= 5.5 V
= 5.5 V,
mA
I
CC
V = 5.5 V
I
Control inputs
V = 2.7 V
I
µA
IH
CC
§
A or B ports
20
Control inputs
–0.1
–0.1
–112
30
I
I
V
V
= 5.5 V,
= 5.5 V,
V = 0.4 V
mA
mA
IL
CC
I
§
A or B ports
¶
B ports
V
O
= 2.25 V
–30
O
CC
Outputs high
Outputs low
18
26
16
25
30
33
SN74ALS638A
SN74ALS639A
V
V
= 5.5 V
= 5.5 V
41
CC
Outputs disabled
Outputs high
30
I
mA
CC
40
Outputs low
50
CC
Outputs disabled
is between 4.75 V and 5.25 V
54
†
Applies only to the SN74ALS638A-1 version and only if V
All typical values are at V
CC
For I/O ports, the parameters I and I include the off-state output current.
CC
‡
§
¶
= 5 V, T = 25°C.
A
IH
IL
The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, I
.
OS
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN74ALS638A, SN74ALS639A, SN74AS638A, SN74AS639
OCTAL BUS TRANSCEIVERS
SDAS123A – DECEMBER 1983 – REVISED JANUARY 1995
switching characteristics (see Figure 1)
V
C
R
= 4.5 V to 5.5 V,
= 50 pF,
= 680 Ω (A outputs),
CC
L
L
FROM
(INPUT)
TO
(OUTPUT)
R1 = R2 = 500 Ω (B outputs),
T
A
PARAMETER
UNIT
†
= MIN to MAX
SN74ALS638A SN74ALS639A
MIN
2
MAX
12
12
25
30
25
45
20
22
10
15
MIN
2
MAX
12
12
30
22
30
35
21
25
10
16
t
t
t
t
t
t
t
t
t
t
PLH
PHL
PLH
PHL
PLH
PHL
PZH
PZL
PHZ
PLZ
A
B
ns
ns
ns
ns
ns
B
A
A
B
B
2
2
8
10
5
8
5
10
10
6
OE
OE
OE
10
5
5
8
2
2
3
3
†
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
‡
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
CC
Input voltage, V : All inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
I
A-bus I/O ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
B-bus I/O ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V
Operating free-air temperature range, T : SN74AS638A, SN74AS639 . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
A
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
‡
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.
recommended operating conditions
SN74AS638A
SN74AS639
UNIT
MIN NOM
MAX
V
V
V
V
Supply voltage
4.5
2
5
5.5
V
V
CC
High-level input voltage
Low-level input voltage
High-level output voltage
High-level output current
Low-level output current
Operating free-air temperature
IH
0.8
5.5
–15
64
V
IL
A ports
V
OH
I
I
B ports
mA
mA
°C
OH
A or B ports
OL
T
A
0
70
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN74ALS638A, SN74ALS639A, SN74AS638A, SN74AS639
OCTAL BUS TRANSCEIVERS
SDAS123A – DECEMBER 1983 – REVISED JANUARY 1995
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN74AS638A
SN74AS639
PARAMETER
TEST CONDITIONS
UNIT
†
MIN TYP
MAX
–1.2
0.1
V
V
V
V
= 4.5 V,
I = –18 mA
V
IK
CC
CC
CC
I
I
A ports
B ports
= 4.5 V,
V
OH
= 5.5 V
mA
OH
= 4.5 V to 5.5 V,
I
I
I
I
= –2 mA
= –3 mA
= –15 mA
= 64 mA
V
–2
OH
OH
OH
OL
CC
2.4
V
3.2
V
OH
OL
V
CC
V
CC
V
CC
= 4.5 V
= 4.5 V,
= 5.5 V
2.4
V
A or B ports
Control inputs
A or B ports
Control inputs
0.35
0.55
0.1
V
V = 7 V
I
I
I
mA
I
V = 5.5 V
I
0.1
20
V
CC
= 5.5 V,
V = 2.7 V
I
µA
IH
‡
A or B ports
Control inputs
70
–0.5
–0.75
–150
54
I
I
V
V
= 5.5 V,
= 5.5 V,
V = 0.4 V
I
mA
mA
IL
CC
‡
A or B ports
§
V
O
= 2.25 V
–50
O
CC
Outputs high
Outputs low
24
75
37
56
95
62
SN74AS638A
SN74AS639
V
= 5.5 V
= 5.5 V
122
61
CC
CC
Outputs disabled
Outputs high
Outputs low
I
mA
CC
92
V
154
100
Outputs disabled
†
‡
§
All typical values are at V
For I/O ports, the parameters I and I include the off-state output current.
The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, I
= 5 V, T = 25°C.
A
IH IL
CC
.
OS
switching characteristics (see Figure 1)
V
C
R
= 4.5 V to 5.5 V,
= 50 pF,
= 500 Ω (A outputs),
CC
L
L
FROM
TO
(OUTPUT)
R1 = R2 = 500 Ω (B outputs),
T
A
PARAMETER
(INPUT)
UNIT
¶
= MIN to MAX
SN74AS638A
SN74AS639
MIN
2
MAX
7
MIN
2
MAX
9.5
9
t
t
t
t
t
t
t
t
t
t
PLH
PHL
PLH
PHL
PLH
PHL
PZH
PZL
PHZ
PLZ
A
B
ns
ns
ns
ns
ns
B
A
A
B
B
2
6.5
20
7
2
5
5
22
2
2
9
5
19
9
5
21.5
11.5
10.5
10.5
7
OE
OE
OE
2
2
2
8
2
2
10
7
2
2
2
2
10
2
10.5
¶
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN74ALS638A, SN74ALS639A, SN74AS638A, SN74AS639
OCTAL BUS TRANSCEIVERS
SDAS123A – DECEMBER 1983 – REVISED JANUARY 1995
PARAMETER MEASUREMENT INFORMATION
SERIES 54ALS/74ALS AND 54AS/74AS DEVICES
7 V
R
= R1 = R2
V
CC
L
S1
R1
R
L
Test
Point
From Output
Under Test
From Output
Under Test
Test
Point
Test
Point
From Output
Under Test
C
C
L
R
L
R2
L
C
L
(see Note A)
(see Note A)
(see Note A)
LOAD CIRCUIT FOR
BI-STATE
TOTEM-POLE OUTPUTS
LOAD CIRCUIT
FOR OPEN-COLLECTOR OUTPUTS
LOAD CIRCUIT
FOR 3-STATE OUTPUTS
3.5 V
3.5 V
Timing
Input
High-Level
1.3 V
1.3 V
1.3 V
Pulse
0.3 V
0.3 V
t
h
t
w
t
su
3.5 V
3.5 V
0.3 V
Data
Input
Low-Level
1.3 V
1.3 V
1.3 V
1.3 V
Pulse
0.3 V
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
VOLTAGE WAVEFORMS
PULSE DURATIONS
3.5 V
0.3 V
Output
Control
(low-level
enabling)
1.3 V
1.3 V
3.5 V
t
PZL
Input
1.3 V
1.3 V
t
PLZ
0.3 V
PHL
3.5 V
t
Waveform 1
S1 Closed
(see Note B)
t
PLH
1.3 V
V
OH
In-Phase
Output
1.3 V
1.3 V
1.3 V
V
OL
0.3 V
V
OL
t
PHZ
t
PLH
t
PZH
t
PHL
V
OH
V
Waveform 2
S1 Open
(see Note B)
OH
OL
Out-of-Phase
Output
(see Note C)
1.3 V
1.3 V
0.3 V
V
0 V
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS
NOTES: A.
C includes probe and jig capacitance.
L
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. When measuring propagation delay items of 3-state outputs, switch S1 is open.
D. All input pulses have the following characteristics: PRR ≤ 1 MHz, t = t = 2 ns, duty cycle = 50%.
r
f
E. The outputs are measured one at a time with one transition per measurement.
Figure 1. Load Circuits and Voltage Waveforms
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PACKAGE OPTION ADDENDUM
www.ti.com
7-Jun-2010
PACKAGING INFORMATION
Status (1)
Eco Plan (2)
MSL Peak Temp (3)
Samples
Orderable Device
Package Type Package
Drawing
Pins
Package Qty
Lead/
Ball Finish
(Requires Login)
Purchase Samples
Purchase Samples
Purchase Samples
SN74ALS638A-1N
SN74ALS638A-1NE4
SN74ALS638A-1NSR
ACTIVE
ACTIVE
ACTIVE
PDIP
PDIP
SO
N
N
20
20
20
20
20
Pb-Free (RoHS)
Pb-Free (RoHS)
CU NIPDAU N / A for Pkg Type
CU NIPDAU N / A for Pkg Type
CU NIPDAU Level-1-260C-UNLIM
NS
2000
Green (RoHS
& no Sb/Br)
SN74ALS638A-1NSRE4
SN74ALS638A-1NSRG4
ACTIVE
ACTIVE
SO
SO
NS
NS
20
20
2000
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
CU NIPDAU Level-1-260C-UNLIM
Purchase Samples
Purchase Samples
Green (RoHS
& no Sb/Br)
SN74ALS638AN
SN74ALS638ANE4
SN74ALS638ANSR
ACTIVE
ACTIVE
ACTIVE
PDIP
PDIP
SO
N
N
20
20
20
20
20
Pb-Free (RoHS)
Pb-Free (RoHS)
CU NIPDAU N / A for Pkg Type
CU NIPDAU N / A for Pkg Type
CU NIPDAU Level-1-260C-UNLIM
Purchase Samples
Purchase Samples
Purchase Samples
NS
2000
Green (RoHS
& no Sb/Br)
SN74ALS638ANSRE4
SN74ALS638ANSRG4
SN74ALS639ADW
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
SO
NS
NS
20
20
20
20
20
2000
2000
25
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
CU NIPDAU Level-1-260C-UNLIM
CU NIPDAU Level-1-260C-UNLIM
CU NIPDAU Level-1-260C-UNLIM
CU NIPDAU Level-1-260C-UNLIM
Purchase Samples
Purchase Samples
Purchase Samples
Purchase Samples
Purchase Samples
SO
Green (RoHS
& no Sb/Br)
SOIC
SOIC
SOIC
DW
DW
DW
Green (RoHS
& no Sb/Br)
SN74ALS639ADWE4
SN74ALS639ADWG4
25
Green (RoHS
& no Sb/Br)
25
Green (RoHS
& no Sb/Br)
SN74ALS639AN
SN74ALS639ANE4
SN74ALS639ANSR
ACTIVE
ACTIVE
ACTIVE
PDIP
PDIP
SO
N
N
20
20
20
20
20
Pb-Free (RoHS)
Pb-Free (RoHS)
CU NIPDAU N / A for Pkg Type
CU NIPDAU N / A for Pkg Type
CU NIPDAU Level-1-260C-UNLIM
Purchase Samples
Purchase Samples
Purchase Samples
NS
2000
Green (RoHS
& no Sb/Br)
SN74ALS639ANSRE4
SN74ALS639ANSRG4
ACTIVE
ACTIVE
SO
SO
NS
NS
20
20
2000
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
CU NIPDAU Level-1-260C-UNLIM
Purchase Samples
Purchase Samples
Green (RoHS
& no Sb/Br)
SN74AS638AN
SN74AS638ANE4
SN74AS639DW
NRND
NRND
PDIP
PDIP
SOIC
N
N
20
20
20
20
20
Pb-Free (RoHS)
Pb-Free (RoHS)
TBD
CU NIPDAU N / A for Pkg Type
CU NIPDAU N / A for Pkg Type
Samples Not Available
Samples Not Available
Samples Not Available
OBSOLETE
DW
Call TI
Call TI
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
7-Jun-2010
Status (1)
Eco Plan (2)
MSL Peak Temp (3)
Samples
Orderable Device
Package Type Package
Drawing
Pins
Package Qty
Lead/
Ball Finish
(Requires Login)
Samples Not Available
Samples Not Available
SN74AS639DWR
SN74AS639N
OBSOLETE
OBSOLETE
SOIC
PDIP
DW
N
20
20
TBD
TBD
Call TI
Call TI
Call TI
Call TI
(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) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
Addendum-Page 2
PACKAGE MATERIALS INFORMATION
www.ti.com
14-Jul-2012
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
SPQ
Reel
Reel
A0
B0
K0
P1
W
Pin1
Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant
(mm) W1 (mm)
SN74ALS638A-1NSR
SN74ALS638ANSR
SN74ALS639ANSR
SO
SO
SO
NS
NS
NS
20
20
20
2000
2000
2000
330.0
330.0
330.0
24.4
24.4
24.4
8.2
8.2
8.2
13.0
13.0
13.0
2.5
2.5
2.5
12.0
12.0
12.0
24.0
24.0
24.0
Q1
Q1
Q1
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
14-Jul-2012
*All dimensions are nominal
Device
Package Type Package Drawing Pins
SPQ
Length (mm) Width (mm) Height (mm)
SN74ALS638A-1NSR
SN74ALS638ANSR
SN74ALS639ANSR
SO
SO
SO
NS
NS
NS
20
20
20
2000
2000
2000
367.0
367.0
367.0
367.0
367.0
367.0
45.0
45.0
45.0
Pack Materials-Page 2
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