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PRELIMINARY CM1215 1-, 2- and 4-Channel Low Capacitance ESD Arrays
Features
* * * * * * * * * 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
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. This device is particularly well-suited for protecting systems using high-speed ports such as USB2.0, IEEE1394 (Firewire(R), iLinkTM), 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.
Applications
* * * * * IEEE1394 Firewire(R) 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
Simplified Electrical Schematic
VP
VP
CH4
VP
CH3
CH1
CH1
CH2
VN CM1215-01ST/SO
VN CM1215-02ST/SO CM1215-02SS/SR
CH1
VN
CH2
CM1215-04ST/SO
(c) 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
CH1 1 VN
Top View
1 4
Top View
VP NC VN
1 2 3 5
Top View
VP CH1 VN CH2 CH2
1 6
CH4 VP CH3
D152 / E152
D151 / E151
2
D154 / E154
D152 / E152
3
VN CH1
2
2 3
5 4
VP
3
CH2
CH1
4
3-Pin SOT23-3
4-Pin SOT143
5-Lead SOT23-5
6-pin SOT23-6
Note: These drawings are not to scale.
Pin Configuration
PACKAGE PIN DESCRIPTIONS
PIN NAMER CH1 VN CH2 CH3 VP CH4 N/C SOT23-3 PIN NO. SOT143 PIN NO. SOT23-5 PIN NO. SOT23-6 PIN NO. TYPE DESCRIPTION ESD Channel Negative voltage supply rail ESD Channel ESD Channel Positive voltage supply rail ESD Channel No Connection
1 3 - - 2 - -
2 1 3 - 4 - -
3 2 4 - 5 - 1
1 2 3 4 5 6 -
I/O GND I/O I/O PWR I/O -
Ordering Information
PART NUMBERING INFORMATION
Standard Finish Pins 3 4 5 6 Package SOT23-3 SOT143 SOT23-5 SOT23-6 Ordering Part Number1 CM1215-01ST CM1215-02SS CM1215-02ST CM1215-04ST Part Marking D151 D152 D152 D154 Lead-free Finish Ordering Part Number1 CM1215-01SO CM1215-02SR CM1215-02SO CM1215-04SO Part Marking E151 E152 E152 E154
(c) 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 Operating Supply Voltage (VP-VN) Diode Forward DC Current (Note 1) DC Voltage at any Channel Input Operating Temperature Range Ambient Junction Storage Temperature Range -40 to +85 -40 to +125 -40 to +150 C C C RATING 6 20 (VN-0.5) to (VP+0.5) UNITS V mA V
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 -40 to +85 225 225 225 225 UNITS C mW mW mW mW
(c) 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 VP IP VF PARAMETER Operating Supply Voltage (VP-VN) Operating Supply Current Diode Forward Voltage Top Diode Bottom Diode Channel Leakage Current Channel Input Capacitance (VP-VN) = 3.3V IF = 20mA; TA = 25C 0.6 0.6 0.8 0.8 0.1 1.6 CONDITIONS MIN TYP 3.3 MAX 5.5 8 0.95 0.95 1.0 2.0 UNIT V A V V A pF
ILEAK CIN
TA = 25C; VP = 5V, VN = 0V At 1 MHz, VP = 3.3V, VN = 0V, VIN = 1.65V; Note2 Note 2 (VP-VN) = 3.3V; Note 2 Notes 2, 3, and 4; TA = 25C 15
CIN CMUTUAL VESD
Channel I/O to GND Capacitance Difference Mutual Capacitance ESD Protection Peak Discharge Voltage at any channel input, in system, contact discharge per IEC 61000-4-2 standard Channel Clamp Voltage Positive Transients Negative Transients Dynamic Resistance Positive transients Negative transients
0.04 0.13
pF pF kV
VCL
IPP = 1A, tP = 8/20S; TA=25C; Notes 2 IPP = 1A, tP = 8/20S; TA = 25C; Notes 2
VP+1.5 VN-1.5 0.4 0.4
V V
RDYN
Note 1: Note 2: Note 3: Note 4:
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, VP = 3.3V, VN grounded. From I/O pins to VP or VN only. VP bypassed to VN with low ESR 0.2F ceramic capacitor.
(c) 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
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, 0.1F chip capacitor between VP and VN, TA = 25C)
Capacitance (pF)
Figure 2. Typical Filter Performance (nominal conditions unless specified otherwise, 50 Ohm Environment
(c) 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
(c) 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. 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
END VIEW 1 2
E1 E
e
e1
SIDE VIEW
D 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
Controlling dimension: millimeters
Package Dimensions for SOT23-3.
(c) 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. For complete information on the SOT143 package, see the California Micro Devices SOT143 Package Information document. Mechanical Package Diagrams
TOP VIEW e
4
3
PACKAGE DIMENSIONS
Package Pins Dimensions A A1 b b2 c D E E1 e e1 L L1 # per tape and reel Millimeters Min 0.80 0.05 0.30 0.76 0.08 2.80 2.10 1.20 Max 1.22 0.15 0.50 0.89 0.20 3.04 2.64 1.40 Min 0.031 0.002 0.012 0.030 0.003 0.110 0.082 0.047 SOT143 4 Inches Max 0.048 0.006 0.019 0.035 0.008 0.119 0.103 0.055 END VIEW b2 b SIDE VIEW D e1
1 2
E1 E
A
A1
1.92 BSC 0.20 BSC 0.4 0.6 0.54 REF
0.075 BSC 0.008 BSC 0.016 0.024 c 0.021 REF 3000 pieces
Controlling dimension: millimeters
L1
L
Package Dimensions for SOT143.
(c) 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. For complete information on the SOT23-5 package, see the California Micro Devices SOT23 Package Information document.
5
Mechanical Package Diagrams
TOP VIEW e1 e
4
PACKAGE DIMENSIONS
Package Pins Dimensions A A1 b c D E E1 e e1 L L1 # per tape and reel Millimeters Min -0.00 0.30 0.08 2.75 2.60 1.45 Max 1.45 0.15 0.50 0.22 3.05 3.00 1.75 Min -0.0000 0.0118 0.0031 0.1083 0.1024 0.0571 SOT23-5 (JEDEC name is MO-178) 5 Inches Max 0.0571 0.0059 0.0197 0.0087 0.1201 0.1181 0.0689
E1 E
1 2 3
b SIDE VIEW D A
A1 END VIEW
0.95 BSC 1.90 BSC 0.30 0.60 0.60 REF
0.0374 BSC 0.0748 BSC 0.0118 0.0236 c L1 L 0.0236 REF 3000 pieces
Controlling dimension: millimeters
Package Dimensions for SOT23-5.
(c) 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. For complete information on the SOT23-6 package, see the California Micro Devices SOT23 Package Information document.
6
Mechanical Package Diagrams
TOP VIEW
e1
5
e
4
PACKAGE DIMENSIONS
Package Pins Dimensions A A1 b c D E E1 e e1 L L1 # per tape and reel Millimeters Min -0.00 0.30 0.08 2.75 2.60 1.45 Max 1.45 0.15 0.50 0.22 3.05 3.00 1.75 Min -0.0000 0.0118 0.0031 0.1083 0.1024 0.0571 SOT23-6 (JEDEC name is MO-178) 6 Inches Max 0.0571 0.0059 0.0197 0.0087 0.1201 0.1181 0.0689
Pin 1 Marking
E1 E
1 2 3
b
SIDE VIEW
D A
A1
END VIEW
0.95 BSC 1.90 BSC 0.30 0.60 0.60 REF
0.0374 BSC 0.0748 BSC 0.0118 0.0236 c L1 L 0.0236 REF 3000 pieces
Controlling dimension: millimeters
Package Dimensions for SOT23-6.
(c) 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

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