HSMS-2865-BLKG Avago Technologies US Inc., HSMS-2865-BLKG Datasheet - Page 13

• Manufacturer Part Number: HSMS-2865-BLKG
• Description: RF DIODE, SCHOTTKY 0.3PF 7V SOT-143
• Manufacturer: Avago Technologies US Inc.
• Type: Schottky Dioder

Specifications of HSMS-2865-BLKG

• Capacitance Ct: 0.3pF
• Diode Case Style: SOT-143
• Series Resistance @ If: 6ohm
• Peak Reflow Compatible (260 C): Yes
• Leaded Process Compatible: Yes
• Forward Voltage: 350mV
• Diode Type: RF Schottky
• Package: 4SOT-143
• Configuration: Dual Parallel
• Frequency Range: UHF|SHF
• Maximum Forward Voltage: 0.35@1mA V
• Maximum Reverse Voltage: 4 V
• Maximum Processing Temperature: 260 °C
• Maximum Diode Capacitance: 0.3(Typ) pF
• Typical Video Resistance: 5 KOhm
• Typical Voltage Sensitivity: 25@5.8GHz mV/uW
• Typical Tangential Sensitivity: -55@5.8GHz dB
• Pin Count: 3 +Tab
• Package Type: SOT-143
• Breakdown Voltage: 7V
• Package / Case: SOT-143
• Rohs Compliant: Yes
• Forward Current If Max: 1mA
• Forward Voltage Vf Max: 350mV
• No. Of Pins: 4
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Diode Burnout
Any Schottky junction, be it an RF diode or the gate of
a MESFET, is relatively delicate and can be burned out
with excessive RF power. Many crystal video receivers
used in RFID (tag) applications find themselves in poorly
controlled environments where high power sources may
be present. Examples are the areas around airport and
FAA radars, nearby ham radio operators, the vicinity of
a broadcast band transmitter, etc. In such environments,
the Schottky diodes of the receiver can be protected by
a device known as a limiter diode.
only in radar warning receivers and other high cost
electronic warfare applications, these diodes have been
adapted to commercial and consumer circuits.
Avago offers a com plete line of surface mountable PIN
limiter diodes. Most notably, our HSMP‑4820 (SOT‑23)
or HSMP‑482B (SOT‑323) can act as a very fast (nano‑
second) power‑sensitive switch when placed between
the antenna and the Schottky diode, shorting out the
RF circuit temporarily and reflecting the excessive RF
energy back out the antenna.
[6]
13
Avago Application Note 1050, Low Cost, Surface Mount Power Limiters.
[6]
Formerly available
Assembly Instructions
SOT-323 PCB Footprint
A recommended PCB pad layout for the miniature SOT‑
323 (SC‑70) package is shown in Figure 33 (dimensions
are in inches).
Figure 33. Recommended PCB Pad Layout for Avago’s SC70 3L/SOT-323
Products.
A recommended PCB pad layout for the miniature
SOT‑363 (SC‑70 6 lead) package is shown in Figure 34
(dimensions are in inches). This layout provides ample
allowance for package placement by automated
assembly equipment without adding parasitics that could
impair the performance.
Figure 34. Recommended PCB Pad Layout for Avago’s SC70 6L/SOT-363
Products.
0.035
0.039
0.026
0.026
Dimensions in inches
0.022
0.016
0.079
0.075