TI SN74LVC8T245MPWREP

SN74LVC8T245-EP
www.ti.com........................................................................................................................................................................................... SCES770 – DECEMBER 2008
8-BIT DUAL-SUPPLY BUS TRANSCEIVER
WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS
FEATURES
1
•
•
•
•
•
Control Inputs VIH/VIL Levels Are Referenced to
VCCA Voltage
VCC Isolation Feature – If Either VCC Input Is at
GND, All Are in the High-Impedance State
Fully Configurable Dual-Rail Design Allows
Each Port to Operate Over the Full 1.65-V to
5.5-V Power-Supply Range
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
ESD Protection Exceeds JESD 22
– 4000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
SUPPORTS DEFENSE, AEROSPACE,
AND MEDICAL APPLICATIONS
•
•
•
•
Controlled Baseline
One Assembly/Test Site
One Fabrication Site
Available in Military (–55°C/125°C)
Temperature Range (1)
Extended Product Life Cycle
Extended Product-Change Notification
Product Traceability
•
•
•
(1)
Additional temperature ranges are available – contact factory
PW PACKAGE
(TOP VIEW)
VCCA
DIR
A1
A2
A3
A4
A5
A6
A7
A8
GND
GND
1
24
2
23
3
22
4
21
5
20
6
19
7
18
8
17
9
16
10
15
11
14
12
13
VCCB
VCCB
OE
B1
B2
B3
B4
B5
B6
B7
B8
GND
DESCRIPTION/ORDERING INFORMATION
This 8-bit noninverting bus transceiver uses two separate configurable power-supply rails. The SN74LVC8T245
is optimized to operate with VCCA and VCCB set at 1.65 V to 5.5 V. The A port is designed to track VCCA. VCCA
accepts any supply voltage from 1.65 V to 5.5 V. The B port is designed to track VCCB. VCCB accepts any supply
voltage from 1.65 V to 5.5 V. This allows for universal low-voltage bidirectional translation between any of the
1.8-V, 2.5-V, 3.3-V, and 5.5-V voltage nodes.
ORDERING INFORMATION (1)
PACKAGE (2)
TA
–55°C to 125°C
(1)
(2)
TSSOP – PW
Tape and reel
ORDERABLE PART NUMBER
SN74LVC8T245MPWREP
TOP-SIDE MARKING
NH245MEP
For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
Web site at www.ti.com.
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2008, Texas Instruments Incorporated
SN74LVC8T245-EP
SCES770 – DECEMBER 2008........................................................................................................................................................................................... www.ti.com
DESCRIPTION/ORDERING INFORMATION (CONTINUED)
The SN74LVC8T245 is designed for asynchronous communication between two data buses. The logic levels of
the direction-control (DIR) input and the output-enable (OE) input activate either the B-port outputs or the A-port
outputs or place both output ports into the high-impedance mode. The device transmits data from the A bus to
the B bus when the B-port outputs are activated, and from the B bus to the A bus when the A-port outputs are
activated. The input circuitry on both A and B ports is always active and must have a logic HIGH or LOW level
applied to prevent excess ICC and ICCZ.
The SN74LVC8T245 is designed so that the control pins (DIR and OE) are supplied by VCCA.
This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs,
preventing damaging current backflow through the device when it is powered down.
The VCC isolation feature ensures that if either VCC input is at GND, all outputs are in the high-impedance state.
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
FUNCTION TABLE (1)
(EACH 8-BIT SECTION)
CONTROL INPUTS
OE
(1)
OUTPUT CIRCUITS
B PORT
OPERATION
DIR
A PORT
L
L
Enabled
Hi-Z
B data to A bus
L
H
Hi-Z
Enabled
A data to B bus
H
X
Hi-Z
Hi-Z
Isolation
Input circuits of the data I/Os are always active.
LOGIC DIAGRAM (POSITIVE LOGIC)
DIR
2
22
OE
A1
3
21
B1
To Seven Other Channels
2
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Absolute Maximum Ratings (1)
over operating free-air temperature range (unless otherwise noted)
VCCA
VCCB
Supply voltage range
VI
Input voltage range (2)
MIN
MAX
–0.5
6.5
I/O ports (A port)
–0.5
6.5
I/O ports (B port)
–0.5
6.5
Control inputs
–0.5
6.5
A port
–0.5
6.5
B port
–0.5
6.5
A port
–0.5 VCCA + 0.5
B port
–0.5 VCCB + 0.5
UNIT
V
V
VO
Voltage range applied to any output
in the high-impedance or power-off state (2)
VO
Voltage range applied to any output in the high or low state (2) (3)
IIK
Input clamp current
VI < 0
–50
mA
IOK
Output clamp current
VO < 0
–50
mA
IO
Continuous output current
±50
mA
Continuous current through each VCCA, VCCB, and GND
θJA
Package thermal impedance (4)
Tstg
Storage temperature range
(1)
(2)
(3)
(4)
±100
–65
V
V
mA
88
°C/W
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.
The input and output negative-voltage ratings may be exceeded if the input and output current ratings are observed.
The output positive-voltage rating may be exceeded up to 6.5 V maximum if the output current rating is observed.
The package thermal impedance is calculated in accordance with JESD 51-7.
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Recommended Operating Conditions (1) (2) (3) (4)
VCCI
VCCA
VCCB
VCCO
Supply voltage
1.65 V to 1.95 V
High-level
input voltage
VIH
MAX
1.65
5.5
1.65
5.5
1.7
3 V to 3.6 V
VCCI × 0.7
1.65 V to 1.95 V
VIL
Data inputs (5)
VCCI × 0.35
2.3 V to 2.7 V
0.7
3 V to 3.6 V
0.8
4.5 V to 5.5 V
High-level
input voltage
Control inputs
(referenced to VCCA) (6)
VCCA ×
0.65
2.3 V to 2.7 V
1.7
3 V to 3.6 V
4.5 V to 5.5 V
Low-level
input voltage
Control inputs
(referenced to VCCA) (6)
V
2
VCCA × 0.7
1.65 V to 1.95 V
VIL
V
VCCI × 0.3
1.65 V to 1.95 V
VIH
V
V
2
4.5 V to 5.5 V
Low-level
input voltage
UNIT
VCCI × 0.65
2.3 V to 2.7 V
Data inputs (5)
MIN
VCCA ×
0.35
2.3 V to 2.7 V
0.7
3 V to 3.6 V
0.8
4.5 V to 5.5 V
V
VCCA × 0.3
VI
Input voltage
Control inputs
0
5.5
V
VI/O
Input/output
voltage
Active state
0
VCCO
V
3-State
0
5.5
V
1.65 V to 1.95 V
IOH
High-level output current
–4
2.3 V to 2.7 V
–8
3 V to 3.6 V
–24
4.5 V to 5.5 V
–32
1.65 V to 1.95 V
IOL
Low-level output current
Δt/Δv
Input transition
rise or fall rate
TA
Operating free-air temperature
Data inputs
4
2.3 V to 2.7 V
8
3 V to 3.6 V
24
4.5 V to 5.5 V
32
1.65 V to 1.95 V
20
2.3 V to 2.7 V
20
3 V to 3.6 V
10
4.5 V to 5.5 V
(1)
(2)
(3)
(4)
(5)
(6)
4
mA
mA
ns/V
5
–55
125
°C
VCCI is the VCC associated with the data input port.
VCCO is the VCC associated with the output port.
All unused or driven (floating) data inputs (I/Os) of the device must be held at logic HIGH or LOW (preferably VCCI or GND) to ensure
proper device operation and minimize power. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature
number SCBA004.
All unused control inputs must be held at VCCA or GND to ensure proper device operation and minimize power comsumption.
For VCCI values not specified in the data sheet, VIH min = VCCI × 0.7 V, VIL max = VCCI × 0.3 V.
For VCCA values not specified in the data sheet, VIH min = VCCA × 0.7 V, VIL max = VCCA × 0.3 V.
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Electrical Characteristics (1) (2)
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER
VOH
VOL
II
DIR
VCCA
VCCB
IOH = –100 µA,
TEST CONDITIONS
VI = VIH
1.65 V to 4.5 V
1.65 V to 4.5 V
IOH = –4 mA,
VI = VIH
1.65 V
1.65 V
1.2
IOH = –8 mA,
VI = VIH
2.3 V
2.3 V
1.9
IOH = –24 mA,
VI = VIH
3V
3V
2.4
IOH = –32 mA,
VI = VIH
4.5 V
4.5 V
3.8
IOL = 100 µA,
VI = VIL
1.65 V to 4.5 V
1.65 V to 4.5 V
0.1
IOL = 4 mA,
VI = VIL
1.65 V
1.65 V
0.45
IOL = 8 mA,
VI = VIL
2.3 V
2.3 V
0.3
IOL = 24 mA,
VI = VIL
3V
3V
0.55
IOL = 32 mA,
VI = VIL
4.5 V
4.5 V
1.65 V to 5.5 V
1.65 V to 5.5 V
±1
±2
0V
0 to 5.5 V
±1
±6
0 to 5.5 V
0V
±1
±6
1.65 V to 5.5 V
1.65 V to 5.5 V
±1
±2
1.65 V to 5.5 V
1.65 V to 5.5 V
15
5V
0V
15
0V
5V
–2
1.65 V to 5.5 V
1.65 V to 5.5 V
15
5V
0V
–2
0V
5V
15
1.65 V to 5.5 V
1.65 V to 5.5 V
25
VI = VCCA or GND
Ioff
A or B
port
VI or VO = 0 to 5.5 V
IOZ
A or B
port
VO = VCCO or GND,
OE = VIH
ICCA
VI = VCCI or GND,
ICCB
VI = VCCI or GND,
ICCA + ICCB
VI = VCCI or GND,
IO = 0
IO = 0
IO = 0
A port
One A port at VCCA – 0.6 V,
DIR at VCCA, B port = open
DIR
DIR at VCCA – 0.6 V,
B port = open,
A port at VCCA or GND
ΔICCB
B port
One B port at VCCB – 0.6 V,
DIR at GND, A port = open
Ci
Control
inputs
Cio
A or B
port
ΔICCA
(1)
(2)
MIN
TYP MAX
MIN MAX
UNIT
VCCO – 0.1
V
V
0.55
µA
µA
µA
µA
µA
µA
50
3 V to 5.5 V
µA
3 V to 5.5 V
50
3 V to 5.5 V
3 V to 5.5 V
VI = VCCA or GND
3.3 V
3.3 V
VO = VCCA/B or GND
3.3 V
3.3 V
50
µA
4
5
pF
8.5
10
pF
VCCO is the VCC associated with the output port.
VCCI is the VCC associated with the input port.
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Switching Characteristics
over recommended operating free-air temperature range, VCCA = 1.8 V ± 0.15 V (unless otherwise noted) (see Figure 1)
PARAMETER
tPLH
tPHL
tPLH
tPHL
tPHZ
tPLZ
tPHZ
tPLZ
tPZH
tPZL
tPZH
tPZL
VCCB = 1.8 V
± 0.15 V
FROM
(INPUT)
TO
(OUTPUT)
A
B
1.7
B
A
OE
MIN MAX
VCCB = 2.5 V
± 0.2 V
VCCB = 3.3 V
± 0.3 V
VCCB = 5 V
± 0.5 V
UNIT
MIN
MAX
MIN
MAX
MIN MAX
25.9
1.3
13.2
1
11.4
0.8
11.1
ns
0.9
28.8
0.8
27.6
0.7
27.4
0.7
27.4
ns
A
1.5
33.6
1.5
33.4
1.5
33.3
1.4
33.2
ns
OE
B
2.4
36.2
1.9
17.1
1.7
16
1.3
14.3
ns
OE
A
0.4
28
0.4
27.8
0.4
27.7
0.4
27.7
ns
OE
B
1.8
40
1.5
20
1.2
16.6
0.9
14.8
ns
Switching Characteristics
over recommended operating free-air temperature range, VCCA = 2.5 V ± 0.2 V (unless otherwise noted) (see Figure 1)
PARAMETER
tPLH
tPHL
tPLH
tPHL
tPHZ
tPLZ
tPHZ
tPLZ
tPZH
tPZL
tPZH
tPZL
6
FROM
(INPUT)
TO
(OUTPUT)
A
VCCB = 1.8 V
± 0.15 V
VCCB = 2.5 V
± 0.2 V
VCCB = 3.3 V
± 0.3 V
VCCB = 5 V
± 0.5 V
UNIT
MIN
MAX
MIN
MAX
MIN
MAX
B
1.5
25.4
1.2
13
0.8
10.2
0.6
8.8
ns
B
A
1.2
13.3
1
13.1
1
12.9
0.9
12.8
ns
OE
A
1.4
13
1.4
13
1.4
13
1.4
13
ns
OE
B
2.3
33.6
1.8
15
1.7
14.3
0.9
10.9
ns
OE
A
1
17.2
1
17.3
1
17.2
1
17.3
ns
OE
B
1.7
32.2
1.5
18.1
1.2
14.1
1
11.2
ns
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MIN MAX
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Switching Characteristics
over recommended operating free-air temperature range, VCCA = 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 1)
PARAMETER
tPLH
tPHL
tPLH
tPHL
tPHZ
tPLZ
tPHZ
tPLZ
tPZH
tPZL
tPZH
tPZL
VCCB = 1.8 V
± 0.15 V
FROM
(INPUT)
TO
(OUTPUT)
A
B
1.5
B
A
OE
VCCB = 2.5 V
± 0.2 V
MIN MAX
VCCB = 3.3 V
± 0.3 V
VCCB = 5 V
± 0.5 V
UNIT
MIN
MAX
MIN
MAX
MIN MAX
25.2
1.1
12.8
0.8
10.3
0.5
10.4
ns
0.8
11.2
0.8
10.2
0.7
10.1
0.6
10
ns
A
1.6
12.2
1.6
12.2
1.6
12.2
1.6
12.2
ns
OE
B
2.1
33
1.7
14.3
1.5
12.6
0.8
10.3
ns
OE
A
0.8
14.1
0.8
13.6
0.8
13.2
0.8
13.6
ns
OE
B
1.8
31.7
1.4
18.4
1.1
12.9
0.9
10.9
ns
Switching Characteristics
over recommended operating free-air temperature range, VCCA = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
PARAMETER
tPLH
tPHL
tPLH
tPHL
tPHZ
tPLZ
tPHZ
tPLZ
tPZH
tPZL
tPZH
tPZL
FROM
(INPUT)
TO
(OUTPUT)
A
VCC = 1.8 V
± 0.15 V
VCC = 2.5 V
± 0.2 V
VCC = 3.3 V
± 0.3 V
VCC = 5 V
± 0.5 V
MIN MAX
UNIT
MIN
MAX
MIN
MAX
MIN
MAX
B
1.5
25.4
1
12.8
0.7
10
0.4
8.2
ns
B
A
0.7
11
0.4
8.8
0.3
8.5
0.3
8.3
ns
OE
A
0.3
9.4
0.3
9.4
0.3
9.4
0.3
9.4
ns
OE
B
2
32.7
1.6
13.7
1.4
12
0.7
9.7
ns
OE
A
0.7
10.9
0.7
10.9
0.7
10.9
0.7
10.9
ns
OE
B
1.5
31.6
1.3
18.4
1
13.7
0.9
10.7
ns
Operating Characteristics
TA = 25°C
PARAMETER
CpdA (1)
CpdB (1)
(1)
TEST
CONDITIONS
A-port input, B-port output
B-port input, A-port output
A-port input, B-port output
CL = 0,
f = 10 MHz,
tr = tf = 1 ns
B-port input, A-port output
VCCA =
VCCB = 1.8 V
VCCA =
VCCB = 2.5 V
VCCA =
VCCB = 3.3 V
VCCA =
VCCB = 5 V
TYP
TYP
TYP
TYP
2
2
2
3
12
13
13
16
13
13
14
16
2
2
2
3
UNIT
pF
Power dissipation capacitance per transceiver
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PARAMETER MEASUREMENT INFORMATION
2 × VCCO
S1
RL
From Output
Under Test
Open
GND
CL
(see Note A)
TEST
S1
tpd
tPLZ/tPZL
tPHZ/tPZH
Open
2 × VCCO
GND
RL
tw
LOAD CIRCUIT
VCCI
VCCI/2
Input
VCCO
CL
RL
VTP
1.8 V ± 0.15 V
2.5 V ± 0.2 V
3.3 V ± 0.3 V
5 V ± 0.5 V
15 pF
15 pF
15 pF
15 pF
2 kΩ
2 kΩ
2 kΩ
2 kΩ
0.15 V
0.15 V
0.3 V
0.3 V
VCCI/2
0V
VOLTAGE WAVEFORMS
PULSE DURATION
VCCA
Output
Control
(low-level
enabling)
VCCA/2
VCCA/2
0V
tPZL
VCCI
Input
VCCI/2
VCCI/2
0V
tPLH
Output
tPHL
VOH
VCCO/2
VOL
VCCO/2
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
tPLZ
VCCO
Output
Waveform 1
S1 at 2 × VCCO
(see Note B)
VCCO/2
VOL + VTP
VOL
tPZH
tPHZ
Output
Waveform 2
S1 at GND
(see Note B)
VCCO/2
VOH − VTP
VOH
0V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
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: PRRv10 MHz, ZO = 50 Ω, dv/dt ≥ 1 V/ns.
D. The outputs are measured one at a time, with one transition per measurement.
E. tPLZ and tPHZ are the same as tdis.
F. tPZL and tPZH are the same as ten.
G. tPLH and tPHL are the same as tpd.
H. VCCI is the VCC associated with the input port.
I. VCCO is the VCC associated with the output port.
J. All parameters and waveforms are not applicable to all devices.
Figure 1. Load Circuit and Voltage Waveforms
8
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PACKAGE OPTION ADDENDUM
www.ti.com
8-Dec-2008
PACKAGING INFORMATION
Orderable Device
Status (1)
Package
Type
Package
Drawing
Pins Package Eco Plan (2)
Qty
SN74LVC8T245MPWREP
ACTIVE
TSSOP
PW
24
2000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
V62/09615-01XE
ACTIVE
TSSOP
PW
24
2000 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
Lead/Ball Finish
MSL Peak Temp (3)
(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.
OTHER QUALIFIED VERSIONS OF SN74LVC8T245-EP :
• Catalog: SN74LVC8T245
NOTE: Qualified Version Definitions:
• Catalog - TI's standard catalog product
Addendum-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
6-Dec-2008
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
SN74LVC8T245MPWREP TSSOP
PW
24
SPQ
Reel
Reel
Diameter Width
(mm) W1 (mm)
2000
330.0
16.4
Pack Materials-Page 1
A0 (mm)
B0 (mm)
K0 (mm)
P1
(mm)
6.95
8.3
1.6
8.0
W
Pin1
(mm) Quadrant
16.0
Q1
PACKAGE MATERIALS INFORMATION
www.ti.com
6-Dec-2008
*All dimensions are nominal
Device
Package Type
Package Drawing
Pins
SPQ
Length (mm)
Width (mm)
Height (mm)
SN74LVC8T245MPWREP
TSSOP
PW
24
2000
346.0
346.0
33.0
Pack Materials-Page 2
MECHANICAL DATA
MTSS001C – JANUARY 1995 – REVISED FEBRUARY 1999
PW (R-PDSO-G**)
PLASTIC SMALL-OUTLINE PACKAGE
14 PINS SHOWN
0,30
0,19
0,65
14
0,10 M
8
0,15 NOM
4,50
4,30
6,60
6,20
Gage Plane
0,25
1
7
0°– 8°
A
0,75
0,50
Seating Plane
0,15
0,05
1,20 MAX
PINS **
0,10
8
14
16
20
24
28
A MAX
3,10
5,10
5,10
6,60
7,90
9,80
A MIN
2,90
4,90
4,90
6,40
7,70
9,60
DIM
4040064/F 01/97
NOTES: A.
B.
C.
D.
All linear dimensions are in millimeters.
This drawing is subject to change without notice.
Body dimensions do not include mold flash or protrusion not to exceed 0,15.
Falls within JEDEC MO-153
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