View CM1224-04SO_4972461.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

2- and 4-Channel Low Capacitance ESD Protection Arrays CM1224
Features
* * * * * * * * * *
Two or four channels of ESD protection Provides ESD protection to IEC61000-4-2 Level 4 * 8kV contact discharge Low channel input capacitance of 0.7pF typical Minimal capacitance change with temperature and voltage Channel input capacitance matching of 0.02pF typical is ideal for differential signals Zener diode protects supply rail and eliminates the need for external by-pass capacitors Low clamping voltage (VCLAMP) at 10V Low Dynamic resistance (RDYN) at 1.08 Each I/O pin can withstand over 1000 ESD strikes* Available in SOT and MSOP lead-free packages
Product Description
The CM1224 family of diode arrays has been designed to provide ESD protection for electronic components or subsystems 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. A Zener diode is embedded between VP and VN, offering two advantages. First, it protects the VCC rail against ESD strikes, and second, it eliminates the need for a bypass capacitor that would otherwise be needed for absorbing positive ESD strikes to ground. The CM1224 protects against ESD pulses up to 8kV per the IEC 61000-4-2 standard. These devices are particularly well-suited for protecting systems using high-speed ports such as USB 2.0, IEEE1394 (Firewire(R), iLinkTM), Serial ATA, DVI, HDMI and corresponding ports in removable storage, digital camcorders, as well as DVD-RW drives and other applications where extremely low loading capacitance with ESD protection are required. The CM1224 family of devices has lead-free finishing in a small package footprint.
Applications
* * * * * *
USB 2.0 ports at 480Mbps in desktop PCs, notebooks and peripherals 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
Block Diagram
(c)2010 SCILLC. All rights reserved. April 2010 - Rev. 3
Publication Order Number: CM1224/D
CM1224
Package/Pinout Diagrams
Pin Configuration
2-CHANNEL, 4-LEAD SOT143-4 PACKAGE NAME TYPE DESCRIPTION VN GND Negative voltage supply rail CH1 I/O ESD Channel CH2 I/O ESD Channel VP PWR Positive voltage supply rail 4-CHANNEL, 6-LEAD SOT23-6 PACKAGES NAME TYPE DESCRIPTION CH1 I/O ESD Channel VN CH2 CH3 VP CH4 GND I/O I/O PWR I/O Negative voltage supply rail ESD Channel ESD Channel Positive voltage supply rail ESD Channel 4-CHANNEL, 10-LEAD MSOP-10 PACKAGES NAME TYPE DESCRIPTION CH1 I/O ESD Channel NC No Connect VP PWR Positive voltage supply rail CH2 I/O ESD Channel NC No Connect CH3 I/O ESD Channel NC No Connect VN CH4 NC GND I/O Negative voltage supply rail ESD Channel No Connect
PIN 1 2 3 4 PIN 1 2 3 4 5 6
PIN 1 2 3 4 5 6 7 8 9 10
Rev. 3 | Page 2 of 14 | www.onsemi.com
CM1224
Ordering Information
PART NUMBERING INFORMATION
Lead-free Finish # of Channels 2 4 4 Leads 4 6 10 Package SOT143-4 SOT23-6 MSOP-10 Ordering Part Number CM1224-02SR CM1224-04SO CM1224-04MR
1
Part Marking L242 L244 L243
Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.
Specifications
ABSOLUTE MAXIMUM RATINGS
PARAMETER Operating Supply Voltage (VP - VN) Operating Temperature Range Storage Temperature Range DC Voltage at any channel input RATING 6.0 -40 to +85 -65 to +150 (VN - 0.5) to (VP + 0.5) UNITS V C C V
STANDARD OPERATING CONDITIONS
PARAMETER Operating Temperature Range Package Power Rating SOT23-3, SOT143-4,SOT23-5 and SOT23-6 Packages MSOP-10 Package RATING -40 to +85 225 400 UNITS C mW mW
Rev. 3 | Page 3 of 14 | www.onsemi.com
CM1224
ELECTRICAL OPERATING CHARACTERISTICS
SYMBOL PARAMETER VP IP VF Operating Supply Voltage (VP-VN) Operating Supply Current Diode Forward Voltage Top Diode Bottom Diode Channel Leakage Current Channel Input Capacitance Channel Input Capacitance Matching 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 (VP-VN)=3.3V IF = 8mA; TA=25 C CONDITIONS
(SEE NOTE 1)
MIN
TYP 3.3
MAX 5.5 8.0
UNITS V A V V A pF pF
0.60 0.60 TA=25 VP=5V, VN=0V C; At 1 MHz, VP=3.3V, VN=0V, VIN=1.65V At 1 MHz, VP=3.3V, VN=0V, VIN=1.65V 0.60
0.80 0.80 0.1 0.70 0.02
0.95 0.95 1.0 0.80
ILEAK CIN
C
IN
VESD
Notes 2 and 3; TA=25 C TA=25 IPP = 1A, C, tP = 8/20S; Note 3 IPP = 1A, tP = 8/20S Any I/O pin to Ground; Note 3
8 +10.0 -1.8
kV V V V
VCL
RDYN
1.08 0.66

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 = 330, VP = 3.3V, VN grounded. Note 3: These measurements performed with no external capacitor on VP (VP floating).
Rev. 3 | Page 4 of 14 | www.onsemi.com
CM1224
Performance Information
Input Channel Capacitance Performance Curves
Rev. 3 | Page 5 of 14 | www.onsemi.com
CM1224
Performance Information (cont'd)
Typical Filter Performance (nominal conditions unless specified otherwise, 50 Ohm Environment)
Figure 1. Insertion Loss (S21) VS. Frequency (0V DC Bias, VP=3.3V)
Figure 2. Insertion Loss (S21) VS. Frequency (2.5V DC Bias, VP=3.3V)
Rev. 3 | Page 6 of 14 | www.onsemi.com
CM1224
Application Information
Design Considerations
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. Application of Positive ESD Pulse between Input Channel and Ground 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 + L2 x d(IESD) / dt voltage drop of D1 + VSUPPLY + L1 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 0 to 30 Amps in 1ns. Here -9 d(IESD)/dt can be approximated by IESD/t, or 30/(1x10 ). 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. The CM1224 has an integrated Zener diode between VP and VN. This greatly reduces the effect of supply rail inductance L2 on VCL by clamping VP at the breakdown voltage of the Zener diode. However, for the lowest possible VCL, especially when VP is biased at a voltage significantly below the Zener breakdown voltage, it is recommended that a 0.22F ceramic chip capacitor be connected between VP and the ground plane. 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 earlier 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 AP209, "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
Rev. 3 | Page 7 of 14 | www.onsemi.com
CM1224
Mechanical Details
The CM1224 is available in SOT143-4, SOT23-6, and MSOP-10 packages with a lad-free finishing option. The various package drawings are presented below. SOT143-4 Mechanical Specifications Dimensions for CM1224-02SR devices supplied in 4-pin SOT143 packages are presented below.
PACKAGE DIMENSIONS
Package Pins Dimensions Millimeters Min A A1 b b2 c D E E1 e e1 L L1 # per tape and reel 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 1.92 BSC 0.20 BSC 0.4 0.6 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
0.075 BSC 0.008 BSC 0.016 0.021 REF 3000 pieces 0.024
0.54 REF
Package Dimensions for SOT143
Controlling dimension: millimeters
Rev. 3 | Page 8 of 14 | www.onsemi.com
CM1224
Tape and Reel Specifications
PACKAGE SIZE PART NUMBER (mm) CM1224-02SR 2.92 X 2.37 X 1.01 POCKET SIZE (mm) B0 X A0 X K0 2.60 X 3.15 X 1.20 TAPE WIDTH REEL W DIAMETER 8mm 178mm (7") QTY PER REEL 3000 P0 4mm P1 4mm
Rev. 3 | Page 9 of 14 | www.onsemi.com
CM1224
Mechanical Details (cont'd)
SOT23-6 Mechanical Specifications CM1224-04SO devices are packaged in 6-pin SOT23 packages. Dimensions are presented below.
PACKAGE DIMENSIONS
Package Pins Dimensions Millimeters Min A A1 b c D E E1 e e1 L L1 # per tape and reel -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
0.95 BSC 1.90 BSC 0.30 0.60
0.0374 BSC 0.0748 BSC 0.0118 0.0236
0.60 REF
0.0236 REF 3000 pieces
Controlling dimension: millimeters
Package Dimensions for SOT23-6
Rev. 3 | Page 10 of 14 | www.onsemi.com
CM1224
Tape and Reel Specifications
PART NUMBER CM1224-04SO PACKAGE SIZE (mm) 2.90 X 2.80 X 1.45 POCKET SIZE (mm) B0 X A0 X K0 3.20 X 3.20 X 1.40 TAPE WIDTH W 8mm REEL DIAMETER 178mm (7") QTY PER REEL 3000 P0 4mm P1 4mm
Rev. 3 | Page 11 of 14 | www.onsemi.com
CM1224
Mechanical Details (cont'd)
MSOP-10 Mechanical Specifications, 10 pin The CM1224-04MR 10-lead 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 0.17 0.13 2.90 2.90 Max 0.95 0.15 0.27 0.23 3.10 3.10 Min 0.028 0.002 0.007 0.005 0.114 0.114 MSOP 10 Inches Max 0.038 0.006 0.013 0.009 0.122 0.122
0.50 BSC 4.90 BSC 0.40 0.70
0.0196 BSC 0.193 BSC 0.0137 4000 0.029
Controlling dimension: millimeters
Package Dimensions for MSOP-10
Rev. 3 | Page 12 of 14 | www.onsemi.com
CM1224
Tape and Reel Specifications
PART NUMBER CM1224-04MR PACKAGE SIZE (mm) 3.00 X 3.00 X 0.85 POCKET SIZE (mm) B0 X A0 X K0 3.30 X 5.30 X 1.30 TAPE WIDTH W 12mm REEL DIAMETER 330mm (13") QTY PER REEL 4000 P0 4mm P1 8mm
Rev. 3 | Page 13 of 14 | www.onsemi.com
CM1224
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. 3 | Page 14 of 14 | www.onsemi.com

▲Up To Search▲

Price & Availability of CM1224-04SO

	To Download CM1224-04SO Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .