CM1214A

1- and 2-Channel PicoGuard® AC Signal ESD Protector CM1214A Features • • • • • • • • Single channel ESD protection for an AC signal up to ±5V for 0.25W transmit power Connects two channels in series for signals up to ±10V (1W transmit power) ±8kV ESD protection per IEC 61000-4-2 contact discharge Sub-1pF loading capacitance Minimal variation with voltage and temperature Each I/O pin can withstand over 1000 ESD strikes* SOT23-3 and MSOP-8 packages RoHS-compliant, lead-free finishing Product Description The CM1214A PicoGuard® ESD protector is used to protect bipolar signal lines against electrostatic discharge (ESD). The CM1214A allows operation in high-speed environments with signals levels up to ±5V. The CM1214A comes in two versions: • The CM1214A-01SO is a single channel ESD protector and is available in a 3-lead SOT23-3 package. • The CM1214A-02MR is a dual channel ESD protector and is available in an 8-lead MSOP-8 package. The low sub-1pF loading capacitance makes the CM1214A-01SO ideal for protecting high-speed interfaces including RF switches and amplifiers. The CM1214A-02MR is ideal for dual high-speed signal pairs used in Gigabit Ethernet, ADSL, etc. The CM1214A-02MR can also be used for higher transmit voltage applications by connecting the two channels in series. Both devices come in RoHS-compliant, lead-free finishing. Applications • • • • RF switch and amplifier protection RF modules and RF IC protection Wireless handsets and WLAN High-speed AC signals for Gbit ethernet, etc. Block Diagram ©2010 SCILLC. All rights reserved. April 2010 – Rev.2 Publication Order Number: CM1214A/D CM1214A Package/Pinout Diagrams Pin Descriptions SOT23-3 PACKAGE PIN DESCRIPTIONS PIN 1 2 3 NAME CH1 CH2 N.C. DESCRIPTION ESD Channel ESD Channel No connect PIN 1 2 3 4 5 6 7 8 MSOP-8 PACKAGE PIN DESCRIPTIONS NAME CH1 N.C. N.C. CH3 N.C. CH4 CH2 N.C. DESCRIPTION ESD Channel No connect No connect ESD Channel No connect ESD Channel ESD Channel No connect Rev. 2 | Page 2 of 14 | www.onsemi.com CM1214A Ordering Information PART NUMBERING INFORMATION Lead-free Finish Pins Package Ordering Part Number 3 8 SOT23 MSOP CM1214A-01SO CM1214A-02MR 1 Part Marking RF1S RF2S Note 1: Parts are shipped in Tape & Reel form unless otherwise specified. Specifications ABSOLUTE MAXIMUM RATINGS PARAMETER DC Voltage between CH pins Operating Temperature Range Storage Temperature Range Package Power Rating SOT23-3 Package (CM1214A-01SO) MSOP8 Package (CM1214A-02MR) RATING 7 –40 to +85 –65 to +150 UNITS V ° C ° C 225 400 mW mW Rev. 2 | Page 3 of 14 | www.onsemi.com CM1214A STANDARD OPERATING CONDITIONS PARAMETER Operating Temperature Range RATING –40 to +85 UNITS ° C ELECTRICAL OPERATING CHARACTERISTICS (SEE NOTE 1) SYMBOL PARAMETER VST VESD Standoff Voltage ESD Voltage Protection Peak discharge voltage between CH pins a) Contact discharge per IEC 61000-4-2 standard Channel Leakage Current Dynamic Resistance CONDITIONS I=10µA Notes 2 and 3 MIN TYP ±7 MAX UNITS V ±8 kV ILEAK RDYN TA=25° 5.5V between CH pins C, TA=25° IPP = 1A, tP = 8/20µS; Any C, I/O pin to Ground; Note 4 TA=25° IPP = 1A, tP = 8/20µS; C, Note 4 Measured at 1MHz between CH pins ±0.1 1.36 ±1.0 µA Ω VCL Channel Clamp Voltage 11.3 V CIN Channel Input Capacitance Voltage between CH pins = 0V Voltage between CH pins = 5V 0.4 0.35 0.6 0.54 0.9 0.8 pF pF Note 1: All parameters specified at TA = –40° to +85° unless otherwise noted. C C Note 2:. Standard IEC 61000-4-2 with CDischarge = 150pF, RDischarge = 330Ω,. Note 3:. From CH pin with other CH pin grounded. Note 4: No-connect pins are left open for all tests. Rev. 2 | Page 4 of 14 | www.onsemi.com CM1214A Performance Information Typical Capacitance Characteristics vs. Voltage CM1214A illustrates how the loading capacitance remains mainly flat across the voltage range from 0V to 5V, the voltage between CH pins. Figure 1. CM1214A Capacitance vs. Voltage Typical Voltage Current (VI) Characteristics (low current) CM1214A shows how the CM1214A experiences a symmetrical I/V curve, without any snapback or trigger voltage. It gradually starts to turn on at about 6V and clamps about 7V. Figure 2. CM1214A VI Characteristics, Low Current Rev. 2 | Page 5 of 14 | www.onsemi.com CM1214A Typical Voltage-Current (VI) Characteristics (high current, pulse condition) CM1214A shows how the CM1214A experiences a symmetrical I/V curve, without any snapback or trigger voltage. The curve shows only one polarity. Figure 3. CM1214A VI Characteristics, Low Current, Pulse (clamping) Condition Typical Capacitance Characteristics vs. Temperature CM1214A illustrates the loading capacitance for both 0VDC and 1.65VDC input across the -40 to 85° C temperature range. Figure 4. CM1214A Capacitance vs. Temperature Rev. 2 | Page 6 of 14 | www.onsemi.com CM1214A Performance Information (cont’d) Typical Filter Performance (nominal conditions unless specified otherwise, 50 Ohm Environment) Figure 5. Insertion Loss vs. Frequency (0V DC Bias) Figure 6. Insertion Loss vs. Frequency (2.5V DC Bias) Rev. 2 | Page 7 of 14 | www.onsemi.com CM1214A Application Information CM1214A-01SO The CM1214A-01SO protects a single bipolar signal line often found in RF circuits. One I/O pin (pin 1 for example) is connected to the signal line for protection, and the other I/O pin is tied to GND. It is important to have a solid ground connection to reduce the clamping voltage. Pin 3 of the 3-lead SOT23 must be left open (and not connected on the PCB). CM1214A-02MR The CM1214A-02MR protects two bipolar lines, such as for Gbit Ethernet. The PCB traces underneath the package connect across to the corresponding pins (Pins 1, 4, 6 and 7). Pins 2, 3, 5 and 8 of the MSOP-8 package must be left open (and not connected on the PCB). Any disturbance on the line above or below the standoff voltage is clamped. Figure 7. Typical Application - RF Switch and Amplifier Protection, CM1214A-01SO in 3-lead SOT23 Figure 8. Typical Application - Ethernet Protection, CM1214A-02MR in 8-lead MSOP Rev. 2 | Page 8 of 14 | www.onsemi.com CM1214A Application Information (cont’d) Figure 9. Typical Application - IEEE1394 Protection, CM1214A-02MR in 8-lead MSOP Rev. 2 | Page 9 of 14 | www.onsemi.com CM1214A Mechanical Details The CM1214A is supplied in SOT23-3 and MSOP-8 packages. Dimensions are presented below. SOT23-3 Mechanical Specifications The CM1214A-01SO is supplied in a 3-pin SOT23 package. Dimensions are presented below. PACKAGE DIMENSIONS Package Pins Dimensions Min SOT23-3 (JEDEC name is TO-236) 3 Millimeters A A1 b c D E E1 e e1 L L1 # per tape and reel Controlling dimensions: 0.89 0.01 0.30 0.08 2.80 2.10 1.20 0.95 BSC A A1 b c D E E1 e 0.89 0.01 0.30 0.08 2.80 2.10 1.20 0.95 BSC e1 L A A1 b c D E E1 e 1.90 BSC 0.40 0.54 REF L1 0.54 REF L1 3000 pieces Package Dimensions for SOT23-3 Millimeters Rev. 2 | Page 10 of 14 | www.onsemi.com CM1214A Tape and Reel Specifications PART NUMBER CM1214A-01SO PACKAGE SIZE (mm) 2.92 X 2.37 X 1.01 POCKET SIZE (mm) B0 X A0 X K0 2.77 X 3.15 X 1.22 TAPE WIDTH W 8mm REEL DIAMETER 178mm (7") QTY PER REEL 3000 P0 4mm P1 4mm Rev. 2 | Page 11 of 14 | www.onsemi.com CM1214A Mechanical Details (Cont’d) MSOP-8 Mechanical Specifications, 8 pin The CM1214A-02MR is supplied in an 8-pin MSOP package. Dimensions are presented below. PACKAGE DIMENSIONS Package Pins Dimensions Millimeters Min A A1 B C D E e H L # per tape and reel 0.75 0.05 0.28 0.13 2.90 2.90 Max 0.95 0.15 0.38 0.23 3.10 3.10 Min 0.030 0.002 0.011 0.005 0.114 0.114 SOT143 4 Inches Max 0.037 0.006 0.015 0.009 0.122 0.122 0.65 BSC 4.90 BSC 0.40 0.70 0.026 BSC 0.193 BSC 0.016 0.028 4000 pieces Controlling dimension: millimeters Package Dimensions for MSOP-8 Rev. 2 | Page 12 of 14 | www.onsemi.com CM1214A Tape and Reel Specifications PART NUMBER CM1214A-02SR PACKAGE SIZE (mm) 3.00 X 3.00 X 0.85 POCKET SIZE (mm) B0 X A0 X K0 3.3 X 5.3 X 1.3 TAPE WIDTH W 12mm REEL DIAMETER 330mm (13") QTY PER REEL 4000 P0 4mm P1 8mm Rev. 2 | Page 13 of 14 | www.onsemi.com CM1214A ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. 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