PRELIMINARY CM1215 1-, 2- and 4-Channel Low Capacitance ESD Arrays Features Product Description • • The CM1215 family of diode arrays has been designed to provide ESD protection for electronic components or sub-systems requiring minimal capacitive loading. These devices are ideal for protecting systems with high data and clock rates or for circuits requiring low capacitive loading. Each ESD channel consists of a pair of diodes in series which steer the positive or negative ESD current pulse to either the positive (VP) or negative (VN) supply rail. The CM1215 will protect against ESD pulses up to +15kV per the IEC 61000-4-2 standard. • • • • • • • 1, 2, and 4 channels of ESD protection Provides +15 kV ESD protection on each channel per the IEC 61000-4-2 ESD requirements Channel loading capacitance of 1.6 pF typical Channel I/O to GND capacitance difference of 0.04pF typical Mutual capacitance of 0.13pF typical Minimal capacitance change with temperature and voltage Each I/O pin can withstand over 1000 ESD strikes SOT packages Lead-free versions available Applications • • • • • IEEE1394 Firewire® ports at 400Mbps / 800Mbps DVI ports, HDMI ports in notebooks, set top boxes, digital TVs, LCD displays Serial ATA ports in desktop PCs and hard disk drives PCI Express ports General purpose high-speed data line ESD protection This device is particularly well-suited for protecting systems using high-speed ports such as USB2.0, IEEE1394 (Firewire®, iLink™), Serial ATA, DVI, HDMI and corresponding ports in removable storage, digital camcorders, DVD-RW drives and other applications where extremely low loading capacitance with ESD protection are required in a small package footprint. The CM1215 family of devices is available with optional lead-free finishing. Simplified Electrical Schematic VP CH1 VP CH1 VN CM1215-01ST/SO CH4 VP CH3 CH1 VN CH2 CH2 VN CM1215-02ST/SO CM1215-02SS/SR CM1215-04ST/SO © 2005 California Micro Devices Corp. All rights reserved. 06/30/05 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 ● Tel: 408.263.3214 ● Fax: 408.263.7846 ● www.calmicro.com 1 PRELIMINARY CM1215 PACKAGE / PINOUT DIAGRAM Top View Top View 1 CH1 VN 3 2 CH2 1 VN 2 CH1 3 4-Pin SOT143 3-Pin SOT23-3 5 VP CH1 1 VN 2 4 CH2 CH2 3 D154 / E154 CH1 NC D152 / E152 VN 2 VP D152 / E152 D151 / E151 3 VP 4 1 Top View Top View 6 CH4 5 VP 4 CH3 6-pin SOT23-6 5-Lead SOT23-5 Note: These drawings are not to scale. Pin Configuration PACKAGE PIN DESCRIPTIONS SOT23-3 SOT143 SOT23-5 SOT23-6 PIN NO. PIN NO. PIN NO. PIN NO. TYPE DESCRIPTION CH1 1 2 3 1 I/O ESD Channel VN 3 1 2 2 GND Negative voltage supply rail CH2 − 3 4 3 I/O ESD Channel CH3 − − − 4 I/O ESD Channel VP 2 4 5 5 PWR Positive voltage supply rail CH4 − − − 6 I/O ESD Channel N/C − − 1 − − No Connection PIN NAMER Ordering Information PART NUMBERING INFORMATION Standard Finish Lead-free Finish Pins Package Ordering Part Number1 Part Marking Ordering Part Number1 Part Marking 3 SOT23-3 CM1215-01ST D151 CM1215-01SO E151 4 SOT143 CM1215-02SS D152 CM1215-02SR E152 5 SOT23-5 CM1215-02ST D152 CM1215-02SO E152 6 SOT23-6 CM1215-04ST D154 CM1215-04SO E154 © 2005 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 06/30/05 PRELIMINARY CM1215 Specifications ABSOLUTE MAXIMUM RATINGS PARAMETER RATING UNITS Operating Supply Voltage (VP-VN) 6 V Diode Forward DC Current (Note 1) 20 mA (VN-0.5) to (VP+0.5) V Ambient -40 to +85 °C Junction -40 to +125 °C Storage Temperature Range -40 to +150 °C DC Voltage at any Channel Input Operating Temperature Range STANDARD OPERATING CONDITIONS PARAMETER Temperature Range (Ambient) Package Power Rating SOT23-3 Package (CM1215-01ST/SO) SOT143 Package (CM1215-02SS/SR) SOT23-5 Package (CM1215-02ST/SO) SOT23-6 Package (CM1215-04ST/SO) RATING UNITS -40 to +85 °C 225 225 225 225 mW mW mW mW © 2005 California Micro Devices Corp. All rights reserved. 06/30/05 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 ● Tel: 408.263.3214 ● Fax: 408.263.7846 ● www.calmicro.com 3 PRELIMINARY CM1215 Specifications (cont’d) ELECTRICAL OPERATING CHARACTERISTICS NOTE 1 SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT 3.3 5.5 V 8 μA 0.8 0.8 0.95 0.95 V V VP Operating Supply Voltage (VP-VN) IP Operating Supply Current (VP-VN) = 3.3V VF Diode Forward Voltage Top Diode Bottom Diode IF = 20mA; TA = 25°C Channel Leakage Current TA = 25°C; VP = 5V, VN = 0V ±0.1 ±1.0 μA Channel Input Capacitance At 1 MHz, VP = 3.3V, VN = 0V, VIN = 1.65V; Note2 1.6 2.0 pF Channel I/O to GND Capacitance Difference Note 2 0.04 pF Mutual Capacitance (VP-VN) = 3.3V; Note 2 0.13 pF ESD Protection Peak Discharge Voltage at any channel input, in system, contact discharge per IEC 61000-4-2 standard Notes 2, 3, and 4; TA = 25°C Channel Clamp Voltage Positive Transients Negative Transients IPP = 1A, tP = 8/20μS; TA=25°C; Notes 2 Dynamic Resistance Positive transients Negative transients IPP = 1A, tP = 8/20μS; TA = 25°C; Notes 2 ILEAK CIN ΔCIN CMUTUAL VESD VCL RDYN Note 1: Note 2: Note 3: Note 4: 0.6 0.6 ±15 kV VP+1.5 VN-1.5 V V 0.4 0.4 Ω Ω All parameters specified at TA = -40°C to +85°C unless otherwise noted. These parameters guaranteed by design and characterization. Standard IEC 61000-4-2 with CDischarge = 150pF, RDischarge = 330Ω, VP = 3.3V, VN grounded. From I/O pins to VP or VN only. VP bypassed to VN with low ESR 0.2μF ceramic capacitor. © 2005 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 06/30/05 PRELIMINARY CM1215 Performance Characteristics Capacitance (pF) Input Channel Capacitance Performance Curve 2.000 1.800 1.600 1.400 1.200 1.000 0.800 0.600 0.400 0.200 0.000 0.00 0.50 1.00 1.50 1.65 2.00 2.50 3.00 Bias Voltage (V) Figure 1. Typical Variation of CIN vs. VIN (f = 1MHz, VP= 3.3V, VN = 0V, 0.1μF chip capacitor between VP and VN, TA = 25°C) Figure 2. Typical Filter Performance (nominal conditions unless specified otherwise, 50 Ohm Environment © 2005 California Micro Devices Corp. All rights reserved. 06/30/05 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 ● Tel: 408.263.3214 ● Fax: 408.263.7846 ● www.calmicro.com 5 PRELIMINARY CM1215 APPLICATION INFORMATION Design Considerations In order to realize the maximum protection against ESD pulses, care must be taken in the PCB layout to minimize parasitic series inductances on the Supply/ Ground rails as well as the signal trace segment between the signal input (typically a connector) and the ESD protection device. Refer to Figure 1, which illustrates an example of a positive ESD pulse striking an input channel. The parasitic series inductance back to the power supply is represented by L1 and L2. The voltage VCL on the line being protected is: VCL = Fwd voltage drop of D1 + VSUPPLY + L1 x d(IESD) / dt+ L2 x d(IESD) / dt where IESD is the ESD current pulse, and VSUPPLY is the positive supply voltage. An ESD current pulse can rise from zero to its peak value in a very short time. As an example, a level 4 contact discharge per the IEC61000-4-2 standard results in a current pulse that rises from zero to 30 Amps in 1ns. Here d(IESD)/dt can be approximated by d(ESD)/dt, or 30/(1x10-9). So just 10nH of series inductance (L1 and L2 combined) will lead to a 300V increment in VCL! Similarly for negative ESD pulses, parasitic series inductance from the VN pin to the ground rail will lead to drastically increased negative voltage on the line being protected. As a general rule, the ESD Protection Array should be located as close as possible to the point of entry of expected electrostatic discharges. The power supply bypass capacitor mentioned above should be as close to the VP pin of the Protection Array as possible, with minimum PCB trace lengths to the power supply, ground planes and between the signal input and the ESD device to minimize stray series inductance. Additional Information See also California Micro Devices Application Note AP-209, “Design Considerations for ESD Protection”, in the Applications section at www.calmicro.com. Figure 3. Application of Positive ESD Pulse between Input Channel and Ground © 2005 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 06/30/05 PRELIMINARY CM1215 Mechanical Details The CM1215 is supplied in SOT23-3, SOT143-4, SOT23-5 and SOT23-6 packages with a lead-free finishing option. These package drawings are presented on the following pages. SOT23-3 Mechanical Specifications CM1215-01ST/SO devices are packaged in 3-pin SOT23 packages. Dimensions are presented below. Mechanical Package Diagrams For complete information on the SOT23-3 package, see the California Micro Devices SOT23 Package Information document. TOP VIEW b 3 PACKAGE DIMENSIONS E1 E Package SOT23-3 (JEDEC name is TO-236) Pins 3 Dimensions Millimeters 1 Inches Min Max Min Max A 0.89 1.12 0.0350 0.0441 0.01 0.10 0.0004 0.0039 b 0.30 0.50 0.0118 0.0197 c 0.08 0.20 0.0031 0.0079 D 2.80 3.04 0.1102 0.1197 E 2.10 2.64 0.0827 0.1039 E1 1.20 1.40 0.0472 0.0551 e1 L L1 # per tape and reel 0.95 BSC SIDE VIEW D A1 A 0.0374 BSC 1.90 BSC 0.40 e1 e A1 e 2 0.0748 BSC 0.60 0.54 REF 0.0157 END VIEW 0.0236 0.0213 REF 3000 pieces c L1 L Controlling dimension: millimeters Package Dimensions for SOT23-3. © 2005 California Micro Devices Corp. All rights reserved. 06/30/05 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 ● Tel: 408.263.3214 ● Fax: 408.263.7846 ● www.calmicro.com 7 PRELIMINARY CM1215 Mechanical Details (cont’d) SOT143 Mechanical Specifications CM1215-02SS/SR devices are supplied in 4-pin SOT143 packages. Dimensions are presented below. Mechanical Package Diagrams For complete information on the SOT143 package, see the California Micro Devices SOT143 Package Information document. TOP VIEW e 4 3 PACKAGE DIMENSIONS Package SOT143 Pins 4 Dimensions E1 E 1 Millimeters e1 Inches Min Max Min Max A 0.80 1.22 0.031 0.048 A1 0.05 0.15 0.002 0.006 b 0.30 0.50 0.012 0.019 b2 0.76 0.89 0.030 0.035 c 0.08 0.20 0.003 0.008 D 2.80 3.04 0.110 0.119 E 2.10 2.64 0.082 0.103 E1 1.20 1.40 0.047 0.055 e 1.92 BSC 0.075 BSC e1 0.20 BSC 0.008 BSC L L1 # per tape and reel 0.4 0.6 0.54 REF 0.016 2 SIDE VIEW D A b2 b A1 END VIEW 0.024 c 0.021 REF 3000 pieces L1 Controlling dimension: millimeters L Package Dimensions for SOT143. © 2005 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 06/30/05 PRELIMINARY CM1215 Mechanical Details (cont’d) SOT23-5 Mechanical Specifications CM1215-02ST/SO devices are supplied in 5-pin SOT23 packages. Dimensions are presented below. Mechanical Package Diagrams For complete information on the SOT23-5 package, see the California Micro Devices SOT23 Package Information document. TOP VIEW e1 e 5 E1 E PACKAGE DIMENSIONS 1 Package SOT23-5 (JEDEC name is MO-178) Pins 5 Dimensions SIDE VIEW Min Max A -- 1.45 -- 0.0571 A1 0.00 0.15 0.0000 0.0059 b 0.30 0.50 0.0118 0.0197 c 0.08 0.22 0.0031 0.0087 D 2.75 3.05 0.1083 0.1201 E 2.60 3.00 0.1024 0.1181 E1 1.45 1.75 0.0571 0.0689 e 0.95 BSC 0.0374 BSC e1 1.90 BSC 0.0748 BSC L1 # per tape and reel 0.60 0.60 REF 3 Inches Max 0.30 2 b Millimeters Min L 4 0.0118 D A A1 END VIEW 0.0236 c 0.0236 REF L1 L 3000 pieces Controlling dimension: millimeters Package Dimensions for SOT23-5. © 2005 California Micro Devices Corp. All rights reserved. 06/30/05 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 ● Tel: 408.263.3214 ● Fax: 408.263.7846 ● www.calmicro.com 9 PRELIMINARY CM1215 Mechanical Details (cont’d) SOT23-6 Mechanical Specifications CM1215-04ST/SO devices are supplied in 6-pin SOT23 packages. Dimensions are presented below. Mechanical Package Diagrams For complete information on the SOT23-6 package, see the California Micro Devices SOT23 Package Information document. TOP VIEW e1 6 PACKAGE DIMENSIONS SOT23-6 (JEDEC name is MO-178) Pins 6 Millimeters Max Min Max -- 1.45 -- 0.0571 A1 0.00 0.15 0.0000 0.0059 b 0.30 0.50 0.0118 0.0197 c 0.08 0.22 0.0031 0.0087 D 2.75 3.05 0.1083 0.1201 E 2.60 3.00 0.1024 0.1181 E1 1.45 1.75 0.0571 0.0689 e 0.95 BSC 0.0374 BSC e1 1.90 BSC 0.0748 BSC L1 # per tape and reel 0.60 0.60 REF 1 2 0.0118 3 b Min 0.30 4 E1 E Inches A L 5 Pin 1 Marking Package Dimensions e SIDE VIEW D A A1 END VIEW 0.0236 0.0236 REF 3000 pieces c L1 L Controlling dimension: millimeters Package Dimensions for SOT23-6. © 2005 California Micro Devices Corp. All rights reserved. 10 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 ● Tel: 408.263.3214 ● Fax: 408.263.7846 ● www.calmicro.com 06/30/05