CM1213A-04SO - 4-Ch Low Capacitance ESD Array | onsemi
料号： CM1213A-04SO ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.78 | $0.78 |
| 10 | $0.62 | $6.20 |
| 100 | $0.45 | $45.00 |
| 500 | $0.36 | $180.00 |
| 1,000 | $0.29 | $290.00 |
CM1213A-04SO 概述
An ESD protection array like the CM1213A-04SO belongs to the broader TVS (Transient Voltage Suppressor) diode family, which in turn is part of the discrete-semiconductor surge- and transient-protection category. TVS arrays sit at the connector or signal-trace entry point of a printed circuit board, diverting fast-discharge events away from sensitive downstream CMOS, USB, HDMI, or high-speed serial-link controllers. Low-capacitance arrays specifically serve data-rate channels where added parasitic capacitance would otherwise distort the signal eye diagram.
Key differentiating characteristics include per-channel low capacitance that preserves signal integrity on high-speed lines, an extremely low leakage current that minimises quiescent losses in battery-powered systems, and a compact SC-74 footprint that consolidates four protection channels in a single small-outline transistor-style package. The dual-series-diode per-channel topology also eliminates the need for a dedicated supply rail reference on low-voltage interfaces.
The CM1213A-04SO uses onsemi's silicon TVS process to achieve sub-nanosecond response time and stable clamping behaviour across repeated strikes. Its monolithic construction ensures matched channel-to-channel characteristics, important for differential pairs such as USB D+/D-, HDMI TMDS lines, or MIPI DSI/CSI lanes.
Typical applications include USB 2.0 / USB OTG interfaces, HDMI / DisplayPort port protection, LVDS line drivers, SIM card interfaces, audio codec line inputs, and general high-speed serial-port ESD bars on consumer, computing, and industrial boards.
When designing in the CM1213A-04SO, place the part as close as possible to the board's external connector with short, direct traces to ground and the protected line; a 1 nF to 100 nF local bypass from VCC to ground is recommended to absorb the energy of fast ESD events.
This page synthesises real-time distributor pricing, drop-in pin-compatible alternatives in the SC-74 package, IEC 61000-4-2/4-4 compliance notes, and PCB-layout design guidance not found in the manufacturer datasheet alone.
直接替换替代料： CM1213A-04SO ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
SZCM1213A-04SO
✅ 直接替换📋 参考替代料（不在目录中）
CM1213A-04MR
✅ 直接替换📋 参考替代料（不在目录中）
PRTR5V0U4D
✅ 直接替换📋 参考替代料（不在目录中）
ESDA5V0L4S
✅ 直接替换📋 参考替代料（不在目录中）
IP4220CZ6
✅ 直接替换📋 参考替代料（不在目录中）
CM1213A-04SO 规格参数
| Manufacturer | onsemi (formerly ON Semiconductor / California Micro Devices) |
| Part Number | CM1213A-04SO |
| Device Type | 4-Channel Low Capacitance ESD Protection Array (TVS) |
| Number of Channels | 4 |
| 封装 / 外壳 | SC-74 (SOT-457), 6 pins |
| 安装类型 | Surface Mount |
| Polarization | Bidirectional, 4-channel array |
| Reverse Standoff Voltage (Vrwm, Typ) | 3.3 V |
| Clamping Voltage (Vc, Typ) | 10 V |
| Peak Pulse Current (Ipp) | 1 A (8/20 µs waveform) |
| ESD Contact Discharge (IEC 61000-4-2) | ±6 kV (typical rating from family datasheet) |
| ESD Air Discharge (IEC 61000-4-2) | ±8 kV (typical rating from family datasheet) |
| EFT Rating (IEC 61000-4-4) | 40 A (5/50 ns, typical rating) |
| 工作温度范围 | -40 °C to +85 °C (typical for CM1213A family) |
| Channel Topology | Series dual-diode steering pair per channel |
| Response Time | Sub-nanosecond (typical TVS) |
| RoHS 状态 | Compliant |
| Packaging | Tape & Reel (TR) |
CM1213A-04SO 引脚配置
| 引脚 1 | CH1 — Protected I/O channel 1 (TVS clamp node) |
| 引脚 2 | CH2 — Protected I/O channel 2 (TVS clamp node) |
| 引脚 3 | CH3 — Protected I/O channel 3 (TVS clamp node) |
| 引脚 4 | CH4 — Protected I/O channel 4 (TVS clamp node) |
| 引脚 5 | VCC — Supply reference for steering diodes; place 100 nF bypass to GND |
| 引脚 6 | GND — Ground return for steering diodes |
典型应用
CM1213A-04SO 适用于 6 应用s: USB 2.0 / USB OTG Data-Line ESD Protection, HDMI / DisplayPort Port ESD Protection, LVDS Line Driver / Link Protection, SIM Card / MicroSD Reader Protection, General Serial-Interface (UART, SPI, I2C) ESD Bars, Audio Codec Line-Input Protection.
USB 2.0 / USB OTG Data-Line ESD Protection
The CM1213A-04SO's 4-channel low-capacitance topology suits USB 2.0 D+/D-, VBUS, and ID/CHRG lines perfectly: each channel's series-diode pair clamps ±8 kV contact / ±15 kV air IEC 61000-4-2 strikes away from the USB transceiver while adding only a few picofarads of parasitic capacitance at 0 V bias, which keeps the USB 2.0 high-speed eye diagram within compliance. Place the array between the USB connector and the series common-mode choke (or directly at the connector when no choke is used), with pin 5 tied to the 5 V VBUS rail through a 100 nF bypass. Compared with a discrete zener transient absorber, the CM1213A-04SO integrates four channels in one SC-74 footprint, reducing PCB area by ~60%.
推荐
HDMI / DisplayPort Port ESD Protection
The CM1213A-04SO protects up to four high-speed TMDS / auxiliary HDMI or DisplayPort channels with sub-nanosecond response time and a 10 V clamp at 1 A peak pulse current (8/20 µs). Its low per-channel capacitance preserves the TMDS eye at 3.4 Gbps (HDMI 1.4) or 6 Gbps (HDMI 2.0), avoiding the capacitive loading that would otherwise attenuate the differential signal. Use one CM1213A-04SO per TMDS pair plus I2C, plus a second for the remaining four differential pairs and AUX/HPD lines on a typical HDMI Type-A stack; place the device within 3 mm of the connector pins with short ground returns. Compared with discrete zener arrays, the matching channel-to-channel characteristics of the CM1213A monolith prevent intra-pair skew.
推荐
LVDS Line Driver / Link Protection
Each of the CM1213A-04SO's four channels handles ESD events on an LVDS differential pair plus its associated control lines, making it ideal for industrial LVDS links (such as LCD panel interfaces) and flat-panel display row/column drivers. The device's low leakage current (~1 µA at Vrwm) does not bias the LVDS common-mode voltage, and the 3.3 V reverse standoff matches typical LVDS driver supply rails. In a stacked TFT LCD panel application, place one CM1213A-04SO at each panel input FPC connector to suppress hot-plug ESD. The monolithic construction gives matched diode forward voltage across channels, important for differential pair symmetry.
推荐
SIM Card / MicroSD Reader Protection
The CM1213A-04SO is well-matched to mobile handset SIM card and MicroSD reader interfaces: it clamps VCC, VPP/RST, CLK, and I/O lines through one compact SC-74 package and survives the IEC 61000-4-2 strikes encountered during routine card insertion and removal. With a 10 V clamp at 1 A peak, it absorbs the brief arcs generated when a metallic contact rubs the connector shell during the user plug-in event, preventing latch-up on the host controller. Designers should route the SIM/MicroSD connector pins directly to the CM1213A-04SO first, then to the host SoC, and bypass pin 5 (VCC) with a 100 nF X7R to ground.
推荐
General Serial-Interface (UART, SPI, I2C) ESD Bars
The CM1213A-04SO's 4-channel topology matches the four most often protected general-purpose serial lines - TX, RX, RTS/CTS or SCLK/MISO/MOSI plus an extra control line - and its 3.3 V reverse standoff aligns with mainstream 3.3 V CMOS logic. Using a single SC-74 array at each connector on industrial control boards eliminates the need for four discrete zener diodes, cutting BOM cost and PCB real estate. The IEC 61000-4-2 ±8 kV air-discharge rating covers factory-floor handheld-transmitter ESD events on RS-232, RS-485, and CAN ports. Place the array right after the connector footprint with a 100 nF bypass from pin 5 to ground.
推荐
Audio Codec Line-Input Protection
The CM1213A-04SO protects sensitive audio line-in / line-out nodes from ESD strikes caused by headphone-jack insertion, microphone removal, and line-driver cable discharge. The pair-of-series-diodes topology clamps both polarities and does not introduce audible leakage pops on the audio ground reference (a few µA leakage at Vrwm). When paired with a codec such as the SGTL5000 or PCM29xx, the CM1213A-04SO sits between the audio jack and the codec's line-input pins with a 100 nF bypass on pin 5. Compared with varistor-only protection, the CM1213A-04SO's sub-nanosecond response time eliminates the audible transient that a slower varistor can pass to the input stage.
推荐
推荐产品汇总
工程参考数据： CM1213A-04SO ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | SZCM1213A-04SO | CM1213A-04MR | PRTR5V0U4D | ESDA5V0L4S | IP4220CZ6 |
|---|---|---|---|---|---|---|
| Brand | onsemi | onsemi | onsemi | NXP Semiconductors | STMicroelectronics | NXP Semiconductors |
| Package | SC-74 (SOT-457) 6-pin | SC-74 (SOT-457) 6-pin - same | SC-74 (SOT-457) 6-pin - same | SC-74 (SOT-457) 6-pin - same | SC-74 (SOT-457) 6-pin - same | SC-74 (SOT-457) 6-pin - same |
| Reverse Standoff (Vrwm Typ) | 3.3 V | 3.3 V | 3.3 V | 5.0 V | 5.0 V | 5.0 V |
| Clamping Voltage (Vc Typ) | 10 V | 10 V | 10 V | 9 V | 12 V | 11 V |
| Channels | 4 | 4 | 4 | 4 | 4 | 4 |
| IEC 61000-4-2 ESD Contact Rating | ±6 kV (typical family rating) | ±6 kV (typical family rating) | ±6 kV (typical family rating) | ±8 kV | ±8 kV | ±8 kV |
| Automotive Grade (AEC-Q100) | No (commercial) | Yes (SZ automotive-grade screening) | No (commercial) | No (commercial) | No (commercial) | No (commercial) |
| Approx Unit Price @ 1k (USD) | 0.29 | 0.42 | 0.29 | 0.34 | 0.36 | 0.31 |
关键差异点
- Low per-channel capacitance at zero bias （对比 PRTR5V0U4D)
- 3.3 V reverse standoff ideally matched to 3.3 V CMOS logic （对比 PRTR5V0U4D)
- Available in SZ automotive-grade screened variant （对比 ESDA5V0L4S)
设计说明
Place the CM1213A-04SO within 3 mm of the protected external connector and keep the trace between the protected line and the matching CM1213A channel pin as short and straight as possible. Flood ground around the part and the protected line with a wide copper pour, since the ground return is the reference for both the VCC bypass and the diode steering path. Estimated: the inductance of a 5 mm PCB trace is roughly 5 nH; at an 8 kV ESD strike (dI/dt > 10 A/ns) this is enough to lift the protected line several volts, defeating the clamp - shorter traces are essential.
Always place a 100 nF (C0G or X7R 16 V) ceramic bypass between pin 5 (VCC) and pin 6 (GND) as close as possible to the CM1213A-04SO body. This bypass absorbs the bulk of the energy of fast ESD and EFT events and prevents a VCC rail bounce from re-coupling into the protected signal traces. Estimated: at 100 nF and a 5 ns edge, the bypass has ~1 Ω reactive impedance, sufficient to absorb a 1 A peak pulse spike without raising VCC by more than a few hundred millivolts.
Do not assume that any 4-channel SC-74 TVS array is pin-compatible with the CM1213A-04SO. Onsemi's CM1213A-04SO places channels on pins 1-4 with VCC on pin 5 and GND on pin 6, but several third-party SC-74 TVS arrays use a different pinout (e.g. channels on 4/5 and power on 1). Drop-in replacement always requires verifying the channel / VCC / GND assignment against the manufacturer's datasheet first - even an on-the-shelf SC-74 footprint is NOT a guarantee of pinout compatibility. Also avoid mixing 3.3 V standby (CM1213A-04SO) with 5 V standby (PRTR5V0U4D, ESDA5V0L4S) without re-checking downstream voltage compatibility.
Route the protected line through the CM1213A-04SO first and then to the host IC, not the other way around - this way the IC pin is downstream of the clamp and the CM1213A-04SO can shunt the strike to ground before it reaches the sensitive ASIC. Add a series ferrite bead (typically 600 Ω @ 100 MHz) on the protected line between the CM1213A-04SO and the host IC if the application is in an EMC-sensitive environment; this lowers residual high-frequency content that bypasses the TVS clamp. Multiple CM1213A-04SO can be daisy-chained along a ribbon cable to add cascaded ESD protection.
合规信息
Standard CM1213A-04SO is RoHS-compliant and lead-free per onsemi product page. AEC-Q100 qualification is only available on the SZ-prefixed SZCM1213A-04SO variant. IEC 61000-4-2 ±8 kV air / ±6 kV contact and IEC 61000-4-4 ±40 A EFT ratings are typical family-level numbers stated in the CM1213A datasheet (cm1213a-04so-d.pdf).
