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1- and 2-Channel PicoGuard(R) 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(R) 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
(c)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=10A 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 = 8/20S; Any C, I/O pin to Ground; Note 4 TA=25 IPP = 1A, tP = 8/20S; C, Note 4 Measured at 1MHz between CH pins
0.1 1.36
1.0
A
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 = -40C to +85 unless otherwise noted. C Note 2:. Standard IEC 61000-4-2 with CDischarge = 150pF, RDischarge = 330,. 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
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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
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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. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. "Typical" parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada Email: orderlit@onsemi.com N. American Technical Support: 800-282-9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81-3-5773-3850 For additional information, please contact your local Sales Representative Order Literature: http://www.onsemi.com/orderlit ON Semiconductor Website: www.onsemi.com
Rev. 2 | Page 14 of 14 | www.onsemi.com

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