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Broadcom Limited ASSR-322R-502E
- Part No.:
- ASSR-322R-502E
- Manufacturer:
- Broadcom Limited
- Category:
- Solid State Relays (SSR)
- Package:
- 8-SMD (0.300", 7.62mm)
- Datasheet:
-
ASSR-322R-502E.pdf
- Description:
- SSR RELAY SPST-NO 200MA 0-250V
- Quantity:
- Payment:
- Shipping:
Inventory:1,594
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Product details
Overview
ASSR-322R-502E from Broadcom (formerly Avago) is a dual-channel, normally-off, solid-state SPST relay with optically isolated MOSFET output stage, 250V output withstand voltage, 8.5Ω typical on-resistance, and 60pF typical off-capacitance - designed for high-speed signal switching in automatic test equipment.
For engineers reviewing the ASSR-322R-502E datasheet, pinout, applications, or equivalent options, key selection criteria include low C×R (340pF·Ω), sub-0.5ms turn-on time, 30pA typical off-state leakage, CMOS-compatible 3mA input threshold, and UL/CSA safety certification at 3750 Vrms.
Technical Context
The ASSR-322R-502E integrates two independent opto-isolated channels, each combining an AlGaAs LED input stage with a photovoltaic diode array driver controlling two discrete high-voltage MOSFETs. Its dual SPST Form A topology replaces electromechanical relays without moving parts.
Switching is controlled by input current ≥3mA (ON) or ≤0.8V forward voltage (OFF); isolation relies on ≥3750 Vrms dielectric withstand and ≥10¹² Ω input-output resistance. It operates across –40°C to +85°C with no derating required below 70°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Withstand Voltage | 250 V - supports signal routing up to industrial AC mains-referenced test voltages |
| On-Resistance (RON) | 8.5 Ω typical - ensures <170mV drop at 20mA, preserving signal integrity in precision measurement paths |
| Off-Capacitance (COFF) | 60 pF typical - minimizes crosstalk and loading in high-frequency analog/digital multiplexing |
| Turn-On/Off Time | 0.25 ms / 0.02 ms typical - enables >1.5 kHz channel switching rate in automated test sequencing |
| Input Threshold Current | 3 mA - directly drivable by standard CMOS logic without external amplification |
| Off-State Leakage | 30 pA typical - reduces measurement error in picoamp-level current sensing applications |
| C×R Product | 340 pF·Ω typical - quantifies combined capacitive and resistive signal distortion; lower = better high-frequency fidelity |
Pinout & Package
ASSR-322R-502E uses an 8-pin gull-wing surface-mount package (SOIC-8 variant per option -502E), with pins grouped into two isolated domains: input side (pins 1–4) and output side (pins 5–8). Pin 1 is LED anode; pin 2 is LED cathode; pins 5/6 and 7/8 form two independent SPST output switches.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | LED Anode (Channel A) | Positive input terminal for first optocoupler LED; requires series resistor for current limiting |
| 2 | LED Cathode (Channel A) | Ground return for Channel A LED; tied to system digital ground |
| 3 | LED Anode (Channel B) | Positive input for second independent LED; enables asynchronous control of dual channels |
| 4 | LED Cathode (Channel B) | Ground return for Channel B LED; may be shared or isolated per layout requirements |
| 5,6 | Output Terminal 1 (Ch A) | One side of first MOSFET switch; bidirectional signal path with 250V rating |
| 7,8 | Output Terminal 2 (Ch A) | Second side of first MOSFET switch; pins 5–6 and 7–8 are isolated pairs |
Key Features
| Feature | Design Value |
|---|---|
| Dual SPST Form A topology | Replaces two discrete electromechanical relays with single 8-pin IC, reducing PCB area by >60% vs DIP-8 EMRs |
| Low C×R (340pF·Ω) | Enables clean switching of signals up to 10 MHz without significant edge degradation or settling delay |
| 3750 Vrms isolation | Meets UL1577 and CSA Component Acceptance #5 - supports functional safety in Class I medical and CAT II industrial systems |
| 0.2A output rating | Sustains continuous 200mA at 25°C ambient; derates linearly to 0A at 102°C case temperature per Figure 2 |
| RoHS-compliant lead-free | Meets EU RoHS 6 directive; -502E suffix confirms Pb-free gull-wing SMT packaging with JEDEC-standard reflow profile |
Applications
| Automatic Test Equipment (ATE) | Data Acquisition Systems |
|---|---|
Use Scenario: High-speed multiplexing of sensor inputs and stimulus outputs during wafer-level IC testing. IC Role / Device Role / Timing Role: Dual-channel signal path selector enabling sequential channel scanning at >1 kHz rate. Use Value: Sub-0.5ms switching eliminates test cycle dead time; 30pA leakage prevents bias current corruption in femtoamp-level parametric measurements. |
Use Scenario: Isolating analog front-end channels in modular DAQ units handling mixed-signal industrial sensors. IC Role / Device Role / Timing Role: Galvanically isolated SPST switch decoupling sensor grounds from ADC reference planes. Use Value: 3750 Vrms isolation blocks ground loops and transients; 60pF COFF preserves bandwidth in 100kHz+ anti-aliasing filter stages. |
| Measuring Instruments | EMR / Reed Relay Replacement |
Use Scenario: Range switching in precision multimeters and LCR meters requiring nanovolt-level offset stability. IC Role / Device Role / Timing Role: Low-leakage, low-thermal-EMF signal routing element in autoranging feedback networks. Use Value: 30pA off-state leakage avoids DC offset errors; <1μV offset voltage maintains sub-0.001% measurement accuracy over temperature. |
Use Scenario: Upgrading legacy relay-based boundary scan test fixtures to eliminate mechanical wear and contact bounce. IC Role / Device Role / Timing Role: Solid-state drop-in replacement for 2× DIP-8 EMRs in existing PCB layouts using same footprint. Use Value: 8.5Ω RON matches typical EMR contact resistance; gull-wing -502E variant fits standard SOIC-8 land patterns with no layout change. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar solid-state relay applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLP3558A | Single-channel, 400V rating, 0.15A rating, 1.2Ω RON, 1.5pF COFF | Better for low-RON analog switching but lacks dual-channel integration | Select when ultra-low on-resistance (<2Ω) is critical and board space allows two devices |
| PS7141-AL | Dual-channel, 400V rating, 0.1A rating, 25Ω RON, 0.8pF COFF, slower TON/TOFF | Superior off-capacitance but higher RON limits current-handling capability | Select when minimizing capacitive loading dominates over current capacity or speed |
Compared with TLP3558A and PS7141-AL, the ASSR-322R-502E uniquely balances dual-channel integration, 250V/0.2A rating, 8.5Ω RON, and 60pF COFF - making it optimal for space-constrained ATE multiplexers needing both speed and leakage performance.
Availability
ASSR-322R-502E is available at Aetrix Electronics and suitable for automatic test equipment, data acquisition systems, and measuring instruments requiring stable component supply, long-term lifecycle support, and RoHS-compliant surface-mount packaging.
Supply support for ASSR-322R-502E includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Broadcom Inc. (formerly Avago Technologies) is a global semiconductor leader specializing in infrastructure software, networking, and optoelectronics solutions with over 60 years of optical isolation innovation.
The ASSR-322R product line was engineered for high-reliability, high-speed signal routing in automated test and precision instrumentation - prioritizing low C×R, ultra-low leakage, and safety-certified isolation over cost or general-purpose switching.
FAQ
What is the maximum operating temperature for ASSR-322R-502E?
The ASSR-322R-502E is rated for continuous operation from –40°C to +85°C ambient temperature. Its safe operating area remains valid up to 102°C case temperature, beyond which output current must be derated per Figure 1 in the datasheet. The junction temperature limit is 150°C, and thermal design must ensure this is not exceeded under worst-case power dissipation conditions for ASSR-322R-502E.
Does ASSR-322R-502E support bidirectional signal switching?
Yes, ASSR-322R-502E supports true bidirectional analog and digital signal switching across its output terminals (pins 5/6 and 7/8), as confirmed by its symmetric 250V output withstand voltage rating and MOSFET-based output stage. This enables use in AC-coupled paths, audio routing, and differential signal multiplexing without polarity constraints - a key advantage over diode-based or unidirectional solid-state relays.
What is the input LED forward voltage range for ASSR-322R-502E?
The ASSR-322R-502E has a typical forward voltage of 1.3V at 5mA, with a guaranteed range of 1.1V to 1.65V across –40°C to +85°C. This allows direct drive from 1.8V, 3.3V, or 5V CMOS logic with appropriate series current-limiting resistors - for example, a 1.0kΩ resistor delivers ~3.7mA from a 5V supply, satisfying the 3mA minimum turn-on requirement for ASSR-322R-502E.
Is ASSR-322R-502E certified for safety isolation standards?
Yes, ASSR-322R-502E is UL Recognized per UL 1577 (3750 Vrms for 1 minute) and CSA-approved under Component Acceptance Notice #5. These certifications validate its input-output insulation integrity for functional isolation in industrial and test equipment. Note that safety-critical designs must still comply with end-equipment standards (e.g., IEC 61010) - ASSR-322R-502E provides the component-level isolation foundation.
Can ASSR-322R-502E replace traditional electromechanical relays on existing PCBs?
Yes - the ASSR-322R-502E in gull-wing SOIC-8 package (-502E suffix) shares identical 300-mil body width and pin pitch with industry-standard DIP-8 EMRs, enabling drop-in replacement in many layouts. Its dual-channel configuration matches two single-pole relays, and its 8.5Ω RON closely approximates typical EMR contact resistance. No PCB redesign is needed if land pattern matches JEDEC MS-012, making ASSR-322R-502E ideal for EMR retrofit projects.
ASSR-322R-502E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Broadcom Limited
- Series:
- ASSR
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Mounting Type:
- Surface Mount
- Circuit:
- SPST-NO (1 Form A) x 2
- Output Type:
- AC, DC
- Voltage - Input:
- 1.3VDC
- Voltage - Load:
- 0 V ~ 250 V
- Load Current:
- 200 mA
- On-State Resistance (Max):
- 8.5 Ohms
- Termination Style:
- Gull Wing
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-DIP Gull Wing
- Approval Agency:
- CSA, UL
- Grade:
- -
- Qualification:
- -
ASSR-322R-502E FAQ
1.How can I place an order for ASSR-322R-502E through Aetrix?
Please submit a Request for Quotation (RFQ) for ASSR-322R-502E on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ASSR-322R-502E reliable?
The price and inventory of ASSR-322R-502E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ASSR-322R-502E is usually 5 days.
3.What payment methods are accepted for ASSR-322R-502E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ASSR-322R-502E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ASSR-322R-502E?
ASSR-322R-502E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ASSR-322R-502E order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ASSR-322R-502E?
For technical support, including ASSR-322R-502E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ASSR-322R-502E requirements.
6.How does Aetrix verify that ASSR-322R-502E is sourced from the original manufacturer or authorized distributors?
All ASSR-322R-502E products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ASSR-322R-502E meets industry standards.
7.What is the process for return or replacement of ASSR-322R-502E?
All ASSR-322R-502E units undergo pre-shipment inspection (PSI). If there is an issue with ASSR-322R-502E, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ASSR-322R-502E part is unused and in its original packaging.
Return procedure for ASSR-322R-502E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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