My Inquiry
My Account
onsemi CM1293A-02SR
- Part No.:
- CM1293A-02SR
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
CM1293A-02SR.pdf
- Description:
- TVS DIODE 3.3VWM 9.9VC SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,384
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CM1293A-02SR from onsemi is a 2-channel low-capacitance ESD protection array designed for high-speed data lines including USB2.0, HDMI, and DVI interfaces. It delivers ±8 kV IEC 61000−4−2 contact discharge protection, features 2.0 pF max channel input capacitance, 1.5 pF typical I/O-to-I/O capacitance, and integrated Zener clamping between VP and VN rails to protect supply voltage integrity without external bypass capacitors.
For engineers reviewing the CM1293A-02SR datasheet, pinout, applications, or equivalent options, key selection criteria include low signal-line loading (<2.0 pF), rail-clamped ESD response (VCL = +9.9 V / −1.6 V at 1 A), robust 1000-strike endurance, SOT143-4 footprint compatibility, and operation across −40°C to +85°C industrial temperature range.
Technical Context
The CM1293A-02SR implements a dual-diode steering architecture per channel: one diode steers positive ESD transients to VP, the other steers negative transients to VN. An embedded Zener diode between VP and VN clamps supply rail excursions during ESD events, eliminating need for external bulk decoupling.
Each I/O channel exhibits dynamic resistance of 0.96 Ω (positive) and 0.5 Ω (negative) under 1 A, 8/20 µs pulse conditions, enabling fast transient suppression. Leakage current remains ≤±1.0 µA at 5 V bias, ensuring minimal impact on high-impedance signal paths in USB/HDMI receivers and transmitters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ESD Rating | ±8 kV contact discharge per IEC 61000−4−2 Level 4 - ensures compliance with industrial and consumer ESD immunity requirements. |
| Channel Input Capacitance | 2.0 pF max at 1 MHz - preserves signal integrity on 480 Mbps USB2.0 and 1.65 Gbps DVI links with negligible insertion loss. |
| I/O-to-I/O Capacitance | 1.5 pF typical - minimizes crosstalk between adjacent high-speed lanes in compact port layouts. |
| Clamp Voltage (VCL) | +9.9 V (positive), −1.6 V (negative) at 1 A - limits protected line voltage excursion to safe levels for 3.3 V and 5 V interface ICs. |
| Operating Voltage Range | VP − VN = 3.3 V to 5.5 V - supports standard logic supply rails without level-shifting circuitry. |
| Leakage Current | ±1.0 µA max at 5 V - avoids DC loading errors in precision analog or high-Z digital receiver inputs. |
| Package Power Rating | 225 mW (SOT143-4) - enables continuous operation in thermally constrained PCB areas near connectors. |
Pinout & Package
SOT143-4 (Case 318A), Pb-free, surface-mount package with 1.92 mm × 2.80 mm footprint and 0.95 mm height - optimized for placement directly at board edge connectors.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VN | GND reference rail | Low-inductance return path for negative ESD current; must be connected to system ground plane with minimal trace length. |
| 2 - CH1 | Protected I/O channel | Input/output line requiring bidirectional ESD protection; connects directly to connector pin or high-speed IC pad. |
| 3 - CH2 | Protected I/O channel | Second independent high-speed data line (e.g., USB D+, D− or HDMI TMDS+/- pair leg). |
| 4 - VP | Positive supply rail | Bias source for internal steering diodes and Zener clamp; requires local 0.22 µF ceramic capacitor to ground for optimal clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Zener-supplied rail clamping | Eliminates need for external VP–GND bypass capacitor in most applications, reducing BOM count and PCB area. |
| 2.0 pF max channel capacitance | Enables use on 480 Mbps USB2.0 and 1.65 Gbps DVI channels without measurable signal degradation. |
| 1000+ ESD strike endurance | Guarantees long-term reliability in field-deployed equipment subjected to repeated handling and environmental discharge events. |
| Low dynamic resistance (0.5–0.96 Ω) | Ensures rapid energy diversion during sub-nanosecond ESD rise times, limiting voltage overshoot on protected lines. |
| Pb-free, RoHS-compliant construction | Meets global environmental regulations and supports lead-free reflow soldering profiles (J-STD-020). |
Applications
| HDMI/DVI Port Protection | USB2.0 Interface Protection |
|---|---|
|
Use Scenario: Protecting TMDS differential pairs and DDC/CEC control lines in notebook computers and digital TVs against user-handling ESD. IC Role / Device Role / Timing Role: Bidirectional ESD shunt placed at HDMI connector PCB entry point, clamping transients before they reach SerDes PHY. Use Value: Maintains <2.0 pF loading per channel to preserve eye diagram integrity at 1.65 Gbps while meeting IEC 61000−4−2 Level 4 immunity. |
Use Scenario: Shielding USB2.0 D+ and D− lines in portable storage devices and docking stations from electrostatic discharge during cable insertion. IC Role / Device Role / Timing Role: Dual-channel transient voltage suppressor mounted adjacent to USB Type-A receptacle, routing ESD current to VP/VN rails. Use Value: Delivers ±8 kV contact protection with 1.5 pF inter-channel capacitance to prevent crosstalk-induced bit errors on full-speed 480 Mbps links. |
| Serial ATA Data Line Protection | PCI Express Lane Protection |
|
Use Scenario: Safeguarding SATA II (3 Gbps) transmitter/receiver pins in SSD modules and motherboard controllers against board-level ESD. IC Role / Device Role / Timing Role: Low-capacitance ESD array placed at SATA edge connector, with VP tied to 3.3 V supply and VN to chassis ground. Use Value: 2.0 pF max input capacitance prevents signal rise-time degradation and maintains impedance matching on 100 Ω differential traces. |
Use Scenario: Adding secondary ESD defense to PCIe Gen1/Gen2 x1 lanes in embedded computing systems where primary protection resides upstream. IC Role / Device Role / Timing Role: Discrete two-channel clamp protecting individual TX/RX differential pairs in mini-PCIe slots or M.2 key B/E interfaces. Use Value: Enables compact placement within tight spacing constraints of PCIe edge connectors while sustaining >1000 strike cycles without parameter drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD2E001DRYR (Texas Instruments) | 2-channel, 1.0 pF typical CIN, ±12 kV IEC 61000−4−2, SOT-5X3 (1.6 mm × 1.6 mm) | Lower capacitance but smaller package; requires tighter layout control due to reduced thermal mass and higher sensitivity to trace inductance. | Select when ultra-low 1.0 pF loading is mandatory for >5 Gbps interfaces; verify VP/VN decoupling meets TI's 0.1 µF requirement. |
| ESD5Z3.3T5G (onsemi) | Single-channel, 0.65 pF CIN, ±12 kV IEC 61000−4−2, SOD-523 (1.2 mm × 0.8 mm) | Higher ESD rating but discrete per-channel implementation increases component count and layout complexity for multi-lane ports. | Choose for space-constrained single-line protection where footprint is prioritized over channel integration; not suitable for dual-lane co-location. |
Compared with TPD2E001DRYR and ESD5Z3.3T5G, the CM1293A-02SR offers balanced performance: its 2.0 pF capacitance and ±8 kV rating target mainstream USB/HDMI applications, its SOT143-4 package provides superior thermal dissipation versus micro-SMD alternatives, and its integrated VP–VN Zener simplifies power rail protection without external components.
Availability
CM1293A-02SR is available at Aetrix Electronics and suitable for HDMI port protection, USB2.0 interface hardening, and Serial ATA data line safeguarding requiring stable component supply across industrial, consumer, and embedded design cycles.
Supply support for CM1293A-02SR 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensors, and ESD protection solutions for automotive, industrial, and consumer markets.
The CM1293A-02SR belongs to onsemi's low-capacitance ESD protection array product line, engineered specifically for high-speed serial interfaces where signal fidelity and compact board-edge placement are critical design constraints.
FAQ
What is the maximum operating voltage for CM1293A-02SR?
The CM1293A-02SR supports an operating supply voltage range of VP − VN = 3.3 V to 5.5 V, with absolute maximum rating of 6.0 V. This allows direct integration into standard 3.3 V and 5 V logic domains without external level translation, and ensures reliable operation across industrial temperature ranges (−40°C to +85°C).
Does CM1293A-02SR require an external capacitor on the VP pin?
The CM1293A-02SR integrates a Zener diode between VP and VN to clamp supply rail excursions during ESD events, eliminating the need for external bypass capacitors in many designs. However, for lowest possible clamp voltage-especially when VP is biased significantly below the Zener breakdown voltage-a 0.22 µF ceramic capacitor between VP and ground is recommended per onsemi application guidance.
How many ESD strikes can CM1293A-02SR withstand before degradation?
The CM1293A-02SR is rated to withstand over 1000 ESD strikes at ±8 kV contact discharge (IEC 61000−4−2 Level 4), tested under standard conditions with 1-second intervals and continuous 1000-pulse runs. Post-test verification confirms all electrical parameters remain within specification, validating long-term reliability in high-touch environments.
What is the channel-to-channel capacitance of CM1293A-02SR?
The CM1293A-02SR exhibits 1.5 pF typical capacitance between CH1 and CH2 (I/O-to-I/O), measured at 1 MHz with VP = 3.3 V and VN = 0 V. This low inter-channel coupling minimizes crosstalk in tightly spaced high-speed differential pairs such as USB D+/D− or HDMI TMDS+/- legs.
Is CM1293A-02SR compatible with lead-free reflow soldering processes?
Yes, the CM1293A-02SR is Pb-free and RoHS-compliant, qualified for standard lead-free reflow soldering per J-STD-020. Its SOT143-4 package (Case 318A) supports peak temperatures up to 260°C, making it suitable for automated assembly in modern electronics manufacturing lines.
CM1293A-02SR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- TO-253-4, TO-253AA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Steering (Rail to Rail)
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 3.3V
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- 9.9V (Typ)
- Current - Peak Pulse (10/1000µs):
- 1A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143
CM1293A-02SR FAQ
1.How can I place an order for CM1293A-02SR through Aetrix?
Please submit a Request for Quotation (RFQ) for CM1293A-02SR 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 CM1293A-02SR reliable?
The price and inventory of CM1293A-02SR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CM1293A-02SR is usually 5 days.
3.What payment methods are accepted for CM1293A-02SR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CM1293A-02SR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CM1293A-02SR?
CM1293A-02SR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CM1293A-02SR 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 CM1293A-02SR?
For technical support, including CM1293A-02SR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CM1293A-02SR requirements.
6.How does Aetrix verify that CM1293A-02SR is sourced from the original manufacturer or authorized distributors?
All CM1293A-02SR 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 CM1293A-02SR meets industry standards.
7.What is the process for return or replacement of CM1293A-02SR?
All CM1293A-02SR units undergo pre-shipment inspection (PSI). If there is an issue with CM1293A-02SR, 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 CM1293A-02SR part is unused and in its original packaging.
Return procedure for CM1293A-02SR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CM1293A-02SR Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
