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| CM1214 1 and 2 Channel PicoGuardTM AC Signal ESD Protector Features * * * * * * * * Single channel ESD protection for an AC signal up to 5V for 0.25W transmit power Connect 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 Can withstand over 1000 ESD strikes at 8kV SOT23-3 or MSOP-8 package options Lead-free versions available Product Description The CM1214 PicoGuardTM ESD protector is used to protect bipolar signal lines against electrostatic discharge (ESD). The CM1214 allows operation in highspeed environments with signals levels up to +5V. The sub-1pF low loading capacitance makes the CM121401ST/SO ideal for protecting high-speed interfaces including RF switch and amplifier protection. The CM1214-02MS/MR is ideal for dual high-speed signal pairs such as with Gigabit Ethernet and ADSL, etc. The CM1214-02MS/MR can also be used for higher transmit power applications by connecting the two pairs of devices together in series. The CM1214-01ST/SO is a single channel ESD protector and is available in a 3-lead SOT23-3 package. The CM1214-02MS/MR is a dual channel ESD protector and is available in an 8-lead MSOP-8 package. Both devices are available with optional 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. Electrical Schematics CH1 CH1 CH3 CH2 CM1214-01ST/SO CH2 CH4 CM1214-02MS/MR (c) 2004 California Micro Devices Corp. All rights reserved. 06/28/04 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 Tel: 408.263.3214 Fax: 408.263.7846 www.calmicro.com 1 CM1214 PACKAGE / PINOUT DIAGRAMS Top View CH1 1 Top View CH1 1 8 N.C. CH2 CH4 N.C. RF1/ RF1R CH2 2 Note: These drawings are not to scale. RF2/ RF2R 3 N.C. N.C. N.C. CH3 2 3 4 7 6 5 3-Lead SOT23-3 8-pin MSOP-8 SOT23-3 PACKAGE PIN DESCRIPTIONS PIN 1 2 3 NAME DESCRIPTION CH1 CH2 N.C. ESD Channel ESD Channel No connect PIN 1 2 3 4 5 6 7 8 MSOP-8 PACKAGE PIN DESCRIPTIONS NAME DESCRIPTION CH1 N.C. N.C. CH3 N.C. CH4 CH2 N.C. ESD Channel No connect No connect ESD Channel No connect ESD Channel ESD Channel No connect Ordering Information PART NUMBERING INFORMATION Standard Finish Pins 3 8 Package SOT23 MSOP Ordering Part Number1 CM1214-01ST CM1214-02MS Part Marking RF1 RF2 Lead-free Finish Ordering Part Number1 CM1214-01SO CM1214-02MR Part Marking RF1R RF2R Note 1: Parts are shipped in Tape & Reel form unless otherwise specified. (c) 2004 California Micro Devices Corp. All rights reserved. 2 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 Tel: 408.263.3214 Fax: 408.263.7846 www.calmicro.com 06/28/04 CM1214 Specifications ABSOLUTE MAXIMUM RATINGS PARAMETER DC Voltage between I/O pins Operating Temperature Range Storage Temperature Range Package Power Rating SOT23-3 Package (CM1214-01ST/SO) MSOP8 Package (CM1214-02MS/MR) RATING 7 -40 to +85 -65 to +150 225 400 UNITS V C C mW mW STANDARD OPERATING CONDITIONS PARAMETER Operating Temperature Range RATING -40 to +85 UNITS C ELECTRICAL OPERATING CHARACTERISTICS (SEE NOTE 1) SYMBOL VST VESD PARAMETER Standoff Voltage ESD Voltage Protection Peak discharge voltage between I/O pins a) Contact discharge per IEC 61000-4-2 standard Diode Forward DC Current Channel Leakage Current Channel Clamp Voltage Positive Transients Negative Transients Dynamic Resistance Channel Input Capacitance Voltage between CH pins = 0V Voltage between CH pins = 5V Note 1: Note 2: Note 3: Note 4: Note 5: Note 6: CONDITIONS I=10A Notes 2, 3 and 4 MIN TYP 7 MAX UNITS V 8 Note 5 TA=25C, 5.5V between I/O pins At 8kV ESD HBM; Notes 2, 4 & 6 9.0 -9.0 I = 1A, TA=25C; Measured at 1 MHz between I/O pins; Note 2 applies 0.5 0.5 0.8 0.8 1.2 1.2 1.5 0.1 8 1.0 kV mA A V V VF ILEAK VCL RDYN CIN pF pF All parameters specified at TA = -40C to +85C unless otherwise noted. These parameters guaranteed by design and characterization. Standard IEC 61000-4-2 with CDischarge = 150pF, RDischarge = 330 ,. From I/O pin with other I/O pin grounded. Pin 3 unconnected for all tests (CM1214-01ST/SO only). Human Body Model per MIL-STD-883, Method 3015, CDischarge = 100pF, RDischarge = 1.5K . (c) 2004 California Micro Devices Corp. All rights reserved. 06/28/04 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 Tel: 408.263.3214 Fax: 408.263.7846 www.calmicro.com 3 CM1214 Performance Information Typical Capacitance Characteristics vs. Voltage Figure 1 illustrates how the loading capacitance remains mainly flat across the voltage range from 0V to 5V, which is the voltage between CH pins. Typical Voltage Current (VI) Characteristics (high current, pulse condition) Figure 3 shows how the CM1214 experiences a symmetrical I/V curve, without any snapback or trigger voltage. The curve shows only one polarity. Capacitance vs. Voltage (measured at 1MHz) 1.5 1.4 2 Capacitance [pF] 1.3 1.1 1 0.9 0.8 0.7 0.6 0.5 0 1 2 3 4 5 Current [A] 1.2 1.5 1 0.5 0 0 2 4 6 8 10 12 Voltage [V] Voltage [V] Figure 1. CM1214 Capacitance vs. Voltage Typical Voltage Current (VI) Characteristics (low current) Figure 2 shows how the CM1214 experiences a symmetrical I/V curve, without any snapback or trigger voltage. It gradually starts to leak at about 6V and clamps above 7V. Figure 3. CM1214 VI Characteristics, Low Current, Pulse (clamping) Condition 10 9 8 7 6 5 4 3 2 1 0 0 1 2 3 4 5 6 7 8 Current [uA] Voltage [V] Figure 2. CM1214 VI Characteristics, Low Current (c) 2004 California Micro Devices Corp. All rights reserved. 4 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 Tel: 408.263.3214 Fax: 408.263.7846 www.calmicro.com 06/28/04 CM1214 Performance Information (Cont'd) Typical Filter Performance (nominal conditions unless specified otherwise, 50 Ohm Environment) Figure 4. Insertion Loss vs. Frequency (0V DC Bias) Figure 5. Insertion Loss vs. Frequency (2.5V DC Bias) (c) 2004 California Micro Devices Corp. All rights reserved. 06/28/04 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 Tel: 408.263.3214 Fax: 408.263.7846 www.calmicro.com 5 CM1214 Application Information The CM1214-01ST/SO protects a single bipolar signal line, such as is found in RF circuits. One I/O pin (pin 1 for example) is connected to the signal line to be protected, and the other I/O pin is tied to GND. It is important to have a solid ground connection in order to reduce the clamping voltage. Pin 3 of the 3-lead SOT23 must be left open (not connected on the PCB). The CM1214-02MS/MR protects two bipolar lines, such as for Gbit Ethernet. The PCB traces connect across underneath the package to the corresponding pins, i.e., pin 1 to pin 8 etc. Any disturbance on the line above or below the standoff voltage is clamped. RF ANTENNA LNA SIGNAL LINE SWITCH 1 3 2 C L Not connected PA GND 3-Lead SOT23-3 Figure 6. Typical Application - RF Switch and Amplifier Protection, CM1214-01ST/SO in 3-lead SOT23 TX+ I/O1 I/O2 I/O3 I/O4 TXRX+ RX- CM1214-02MS Figure 7. Typical Application - Ethernet Protection, CM1214-02MS/MR in 8-lead MSOP (c) 2004 California Micro Devices Corp. All rights reserved. 6 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 Tel: 408.263.3214 Fax: 408.263.7846 www.calmicro.com 06/28/04 CM1214 Mechanical Details The CM1214 is available in SOT23-3 and MSOP-8 packages.The various package drawings are presented below. SOT23-3 Mechanical Specifications Dimensions for CM1214-01ST/SO devices packaged in 3-pin SOT23 packages are presented below. For complete information on the SOT23-3 package, see the California Micro Devices SOT23 Package Information document. Mechanical Package Diagrams TOP VIEW b 3 PACKAGE DIMENSIONS Package Pins Dimensions A A1 b c D E E1 e e1 L L1 # per tape and reel Millimeters Min 0.89 0.01 0.30 0.08 2.80 2.10 1.20 Max 1.12 0.10 0.50 0.20 3.04 2.64 1.40 Min 0.0350 0.0004 0.0118 0.0031 0.1102 0.0827 0.0472 SOT23-3 (JEDEC name is TO-236) 3 Inches Max 0.0441 0.0039 0.0197 0.0079 0.1197 0.1039 0.0551 D SIDE VIEW 1 2 E1 E e1 e A1 A 0.95 BSC 1.90 BSC 0.40 0.60 0.54 REF 0.0374 BSC 0.0748 BSC 0.0157 0.0236 c L1 L 0.0213 REF 3000 pieces END VIEW Controlling dimension: millimeters Package Dimensions for SOT23-3. (c) 2004 California Micro Devices Corp. All rights reserved. 06/28/04 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 Tel: 408.263.3214 Fax: 408.263.7846 www.calmicro.com 7 CM1214 Mechanical Details (cont'd) MSOP-8 Mechanical Specifications: CM1214-02MS/MR devices are packaged in 8-pin MSOP packages. Dimensions are presented below. For complete information on the MSOP-8 package, see the California Micro Devices MSOP Package Information document. Mechanical Package Diagrams TOP VIEW D 8 7 6 5 PACKAGE DIMENSIONS Package Pins Dimensions A A1 B C D E e H L # per tube # per tape and reel 2.90 2.90 4.78 0.52 Millimeters Min 0.87 0.05 0.18 3.10 3.10 4.98 0.54 0.114 0.114 0.188 0.017 Max 1.17 0.25 Min 0.034 0.002 MSOP 8 Inches Max 0.046 0.010 0.007 0.122 0.122 0.196 0.025 SEATING PLANE H Pin 1 Marking E 1 2 3 4 SIDE VIEW 0.30 (typ) 0.012 (typ) A A1 B e END VIEW 0.65 BSC 0.025 BSC 80 pieces* 4000 pieces Controlling dimension: inches C L Package Dimensions for MSOP-8 * This is an approximate amount which may vary. (c) 2004 California Micro Devices Corp. All rights reserved. 8 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 Tel: 408.263.3214 Fax: 408.263.7846 www.calmicro.com 06/28/04 |
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