NXP Semiconductors Electronic Components Datasheet



1N4148

High-speed diodes


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DISCRETE SEMICONDUCTORS
DATA SHEET
M3D176
1N4148; 1N4448
High-speed diodes
Product specification
Supersedes data of 1996 Sep 03
1999 May 25


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Philips Semiconductors
High-speed diodes
Product specification
1N4148; 1N4448
FEATURES
Hermetically sealed leaded glass
SOD27 (DO-35) package
High switching speed: max. 4 ns
General application
Continuous reverse voltage:
max. 75 V
Repetitive peak reverse voltage:
max. 75 V
Repetitive peak forward current:
max. 450 mA.
APPLICATIONS
High-speed switching.
DESCRIPTION
The 1N4148 and 1N4448 are high-speed switching diodes fabricated in planar
technology, and encapsulated in hermetically sealed leaded glass SOD27
(DO-35) packages.
handbook, halfpagke
a
MAM246
The diodes are type branded.
Fig.1 Simplified outline (SOD27; DO-35) and symbol.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
PARAMETER
VRRM
VR
IF
IFRM
IFSM
repetitive peak reverse voltage
continuous reverse voltage
continuous forward current
repetitive peak forward current
non-repetitive peak forward current
Ptot total power dissipation
Tstg storage temperature
Tj junction temperature
CONDITIONS
see Fig.2; note 1
square wave; Tj = 25 °C prior to
surge; see Fig.4
t = 1 µs
t = 1 ms
t=1s
Tamb = 25 °C; note 1
Note
1. Device mounted on an FR4 printed circuit-board; lead length 10 mm.
MIN.
MAX.
75
75
200
450
UNIT
V
V
mA
mA
4A
1A
0.5 A
500 mW
65 +200 °C
200 °C
1999 May 25
2


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Philips Semiconductors
High-speed diodes
Product specification
1N4148; 1N4448
ELECTRICAL CHARACTERISTICS
Tj = 25 °C unless otherwise specified.
SYMBOL
PARAMETER
VF forward voltage
1N4148
1N4448
IR reverse current
IR reverse current; 1N4448
Cd diode capacitance
trr reverse recovery time
Vfr forward recovery voltage
CONDITIONS
MIN.
see Fig.3
IF = 10 mA
IF = 5 mA
IF = 100 mA
VR = 20 V; see Fig.5
VR = 20 V; Tj = 150 °C; see Fig.5
VR = 20 V; Tj = 100 °C; see Fig.5
f = 1 MHz; VR = 0; see Fig.6
when switched from IF = 10 mA to
IR = 60 mA; RL = 100 ;
measured at IR = 1 mA; see Fig.7
when switched from IF = 50 mA;
tr = 20 ns; see Fig.8
0.62
MAX.
1
0.72
1
25
50
3
4
4
2.5
UNIT
V
V
V
nA
µA
µA
pF
ns
V
THERMAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
Rth j-tp
Rth j-a
thermal resistance from junction to tie-point lead length 10 mm
thermal resistance from junction to ambient lead length 10 mm; note 1
Note
1. Device mounted on a printed circuit-board without metallization pad.
VALUE
240
350
UNIT
K/W
K/W
1999 May 25
3


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Philips Semiconductors
High-speed diodes
GRAPHICAL DATA
300
handbook, halfpage
IF
(mA)
200
100
MBG451
600
handbook, halfpage
IF
(mA)
400
200
Product specification
1N4148; 1N4448
MBG464
(1) (2)
(3)
0
0
100
Tamb (oC)
200
Device mounted on an FR4 printed-circuit board; lead length 10 mm.
Fig.2 Maximum permissible continuous forward
current as a function of ambient
temperature.
0
01
(1) Tj = 175 °C; typical values.
(2) Tj = 25 °C; typical values.
(3) Tj = 25 °C; maximum values.
VF (V)
2
Fig.3 Forward current as a function of forward
voltage.
102
handbook, full pagewidth
IFSM
(A)
10
MBG704
1
101
1
10
102
103
tp (µs)
104
Based on square wave currents.
Tj = 25 °C prior to surge.
Fig.4 Maximum permissible non-repetitive peak forward current as a function of pulse duration.
1999 May 25
4


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Philips Semiconductors
High-speed diodes
Product specification
1N4148; 1N4448
103
handbook, halfpage
IR
(µA)
102
10
MGD290
(1) (2)
1
101
102
0
100 Tj (oC)
200
(1) VR = 75 V; typical values.
(2) VR = 20 V; typical values.
Fig.5 Reverse current as a function of junction
temperature.
1.2
handbook, halfpage
Cd
(pF)
1.0
0.8
0.6
0.4
0
MGD004
10
VR (V)
20
f = 1 MHz; Tj = 25 °C.
Fig.6 Diode capacitance as a function of reverse
voltage; typical values.
1999 May 25
5


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Philips Semiconductors
High-speed diodes
Product specification
1N4148; 1N4448
handbook, full pagewidth
RS = 50
V = VR IF x R S
D.U.T.
IF
SAMPLING
OSCILLOSCOPE
R i = 50
MGA881
VR
tr
10%
tp
90%
input signal
t
IF
t rr
t
(1)
output signal
(1) IR = 1 mA.
Fig.7 Reverse recovery voltage test circuit and waveforms.
I 1 k
450
RS = 50
D.U.T.
OSCILLOSCOPE
R i = 50
MGA882
I
90%
10%
tr tp
input
signal
V
V fr
tt
output
signal
1999 May 25
Fig.8 Forward recovery voltage test circuit and waveforms.
6


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Philips Semiconductors
High-speed diodes
PACKAGE OUTLINE
Hermetically sealed glass package; axial leaded; 2 leads
Product specification
1N4148; 1N4448
SOD27
(1)
D L G1
DIMENSIONS (mm are the original dimensions)
UNIT
b
max.
D
max.
G1
max.
L
min.
mm 0.56 1.85 4.25 25.4
Note
1. The marking band indicates the cathode.
OUTLINE
VERSION
IEC
SOD27
A24
REFERENCES
JEDEC
EIAJ
DO-35
SC-40
b
L
0 1 2 mm
scale
EUROPEAN
PROJECTION
ISSUE DATE
97-06-09
DEFINITIONS
Data Sheet Status
Objective specification
Preliminary specification
Product specification
This data sheet contains target or goal specifications for product development.
This data sheet contains preliminary data; supplementary data may be published later.
This data sheet contains final product specifications.
Limiting values
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.
1999 May 25
7


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© Philips Electronics N.V. 1999
SCA 65
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner.
The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed
without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license
under patent- or other industrial or intellectual property rights.
Printed in The Netherlands
115002/03/pp8
Date of release: 1999 May 25
Document order number: 9397 750 05892




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