SURFACE MOUNT SUPPRESSORS SOT23 PulseGuard Suppressors help

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SURFACE MOUNT SUPPRESSORS SOT23 PulseGuard Suppressors help

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PULSEGUARD® SUPPRESSOR
SURFACE MOUNT SUPPRESSORS
SOT23
PulseGuard Suppressors help protect sensitive electronic equipment against electrostatic discharge (ESD). They supplement on-chip protection integrated circuitry best suited low-voltage, high-speed applications where capacitance important. Applications such computer ports (especially IEEE 1394), network hardware, cell phone data ports, point-of-sale terminals, industrial controls will benefit from this technology. PulseGuard suppressors polymer composite materials suppress fast-rising transients specified 61000-4-2 MIL-STD883E).
FEATURES
Ultra-low capacitance leakage current Fast response time Bi-directional Withstands multiple strikes Standard JEDEC SOT23 outline Compatible with pick-and-place processes Available 1,500 3,000 piece reels
PHYSICAL SPECIFICATIONS
Materials: Body: Glass Epoxy Terminations: Tin-Lead Soldering Parameters: Wave solder 260oC, seconds maximum Reflow solder 260oC, seconds maximum Operating Temperature Range: -65oC +125oC
TYPICAL APPLICATIONS
Computer ports (especially IEEE 1394) Computer peripherals Network hardware/ports Point-of-Sale terminals Cell phone data ports RF/Antenna circuits Test Equipment Medical Equipment
ORDERING INFORMATION Catalog Number Pieces Reel
PGB002ST23DR PGB002ST23WR 1,500 3,000
ELECTRICAL CHARACTERISTICS
Trigger Voltage1 Clamping Rated Voltage Capacitance2 Response Time1 Leakage Current3 Pulse Withstand1 Notes:
direct discharge method, 61000-4-2. Measured MHz. Measured VDC. Testing fast pulse rates (1-20Hz) cause change leakage current performance (6µA, max).
1,000V typical 150V typical 24VDC 0.055pF <1ns <1nA 1,000 pulses minimum
Voltage1
DESIGN CONSIDERATION
Because fast rise-time transient, placement PulseGuard suppressors design consideration. achieve optimal suppression, devices should placed circuit board close source transient possible. Install PulseGuard suppressors directly behind connector that they first board-level circuit component encountered transient. They connected from signal/data line ground.
PULSEGUARD® SUPPRESSOR
SURFACE MOUNT SUPPRESSORS
SOT23
Generalized PulseGuard Response
(Positive Negative Polarity Pulses)
Trigger Voltage
Generalized Curve
(Positive Negative Polarity Pulses)
Trigger Voltage Current
Voltage
Clamping Voltage
Clamping Voltage Voltage
Time (ns)
DEFINITIONS
Trigger Voltage: measured peak voltage across suppressor before transitions from high resistance. manifested "spike" before clamping voltage achieved. This voltage typically well below damage threshold on-chip protection. Clamping Voltage: voltage level which impulse voltage reduced. This voltage that suppressor holds until transient energy dissipated. Impulse Voltage: Also known Threat Voltage. This voltage that "zapped" into circuit. Voltages generated people exceed 61000-4-2 defines four levels impulse voltage testing purposes:
SEVERITY LEVEL DISCHARGE DIRECT DISCHARGE
Capacitance Frequency
Note: 1,000
Capacitance (fF)
Frequency (GHz)
Carrier Tape Specifications
Parts delivered (178mm) reel, plastic carrier tape
Description Cover tape thickness Drive hole diameter Drive hole spacing Pocket depth Pocket height Pocket spacing Pocket width Carrier tape thickness Carrier tape width
Measurement (mm) 0.06 1.50 4.00 1.02 2.46 8.00 3.23 0.30 8.00
PULSEGUARD® SUPPRESSOR
SURFACE MOUNT SUPPRESSORS
SOT23
Test Set-up 61000-4-2 Waveform, 2kV-15kV
Device under test P6156 Probe (Voltage measurement) KeyTek pulser 2,000- 15,000 Brown (x100)
Faraday cage
Ground return
Tektronic 684B
Blue (x10) shunt (10-5 ohms parallel) P6156 Probe (Current measurement)
Reference Schematics:
Recommended Layout: Device Dimensions:
0.088" 0.007
Equivalent Circuit:
0.080" 0.118" 0.008
Dimension 0.026" Dimension 0.030"
Solder Method
Wave Solder Reflow Solder
0.050 0.050
Dimensions (in.)
0.035 0.035 0.050 0.040 0.090 0.080
0.150 0.140
Note: (common) typically connected chassis ground. However, since PulseGuard suppressors directional, they system voltage also used "dump".

SURFACE MOUNT SUPPRESSORS SOT23 PulseGuard Suppressors help

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