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PRELIMINARY 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 DFN-3, SOT23-3 and 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 low sub-1pF loading capacitance makes the CM121401DF/DE and CM1214-01ST/SO ideal for protecting high-speed interfaces including RF switches and amplifiers. The CM1214-02MS/MR is ideal for dual high-speed signal pairs used in Gigabit Ethernet, ADSL, etc. The CM1214-02MS/MR can also be used for higher transmit voltage applications by connecting the two channels in series. The CM1214-01DF/DE and the CM1214-01ST/SO are single channel ESD protectors available in a 3-lead DFN-3 and SOT23-3 packages respectively. The CM1214-01DF/DE is housed in a very small form factor DFN package that provides up to 20% and 32% board space savings when it is used in place of SC70 and SOT23 packages. The CM1214-02MS/MR is a dual channel ESD protector and is available in an 8lead MSOP-8 package. All three 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 CM1214-01DF/DE
(c) 2005 California Micro Devices Corp. All rights reserved. 03/25/05
CH2
CH4
CM1214-02MS/MR
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
1
PRELIMINARY CM1214
PACKAGE / PINOUT DIAGRAMS
Top View
3
Top View
CH2 CH1
1
Top View
CH1
1 8
N.C. CH2 CH4 N.C.
RF2/ RF2R
RF1/ RF1R
N.C.
1
3
N.C.
N.C. N.C. CH3
2 3 4
7 6 5
DFN-3
Note: These drawings are not to scale.
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
DFN-3 PACKAGE PIN DESCRIPTIONS PIN 1 2 3 NAME DESCRIPTION N.C. CH1 CH2 No connect ESD Channel ESD Channel
Ordering Information
PART NUMBERING INFORMATION
Standard Finish Pins 3 3 8 Package DFN SOT23 MSOP Ordering Part Number1 CM1214-01DF CM1214-01ST CM1214-02MS Part Marking RD RF1 RF2 Lead-free Finish Ordering Part Number1 CM1214-01DE CM1214-01SO CM1214-02MR Part Marking RG RF1R RF2R
Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.
(c) 2005 California Micro Devices Corp. All rights reserved.
RD / RG
2
CH1
CH2
2
SOT23-3
MSOP-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
2
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
03/25/05
PRELIMINARY CM1214
Specifications
ABSOLUTE MAXIMUM RATINGS
PARAMETER DC Voltage between CH pins Operating Temperature Range Storage Temperature Range Package Power Rating DFN-3 Package (CM1214-01DF/DE) SOT23-3 Package (CM1214-01ST/SO) MSOP8 Package (CM1214-02MS/MR) RATING 7 -40 to +85 -65 to +150 TBD 225 400 UNITS V C C mW 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 CH pins a) Contact discharge per IEC 61000-4-2 standard Channel Leakage Current 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: 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 CH pin with other CH pin grounded. No Connect pins are left open for all tests.
CONDITIONS I=10A Notes 2, 3 and 4
MIN
TYP 7
MAX
UNITS V
8 TA=25C, 5.5V between CH pins I = 1A, TA=25C; Measured at 1 MHz between CH pins; Note 2 applies 0.5 0.5 0.8 0.8 1.2 1.2 0.1 1.5 1.0
kV A
ILEAK RDYN CIN
pF pF
(c) 2005 California Micro Devices Corp. All rights reserved. 03/25/05
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
3
PRELIMINARY 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, 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 turn on 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) 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
03/25/05
PRELIMINARY 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) 2005 California Micro Devices Corp. All rights reserved. 03/25/05
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
5
PRELIMINARY CM1214
Application Information
The CM1214-01ST/SO and the CM1214-01DF/DE protect 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 (Pin 1 of the 3-lead DFN) 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 underneath the package connect across 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
C
L
SWITCH
ESD N.C. ESD GND
3-Lead DFN or SOT23-3
PA
Figure 6. Typical Application - RF Switch and Amplifier Protection, CM1214-01ST/SO/DF/DE in 3-lead DFN or 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) 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
03/25/05
PRELIMINARY CM1214
Application Information (cont'd)
IEEE1394
1 2 3 4
PHY
LLC
GALV iso
CM1214-02 CM1214-02
GND
Keep the ESD devices on the PHY side of the galvanic isolation and inside the VCC domain of the PHY controller.
Figure 8. Typical Application - IEEE1394 Protection, CM1214-02MS/MR in 8-lead MSOP
(c) 2005 California Micro Devices Corp. All rights reserved. 03/25/05
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
7
PRELIMINARY CM1214
Mechanical Details
The CM1214 is supplied in DFN-03, SOT23-3 and MSOP-8 packages.Dimensions are presented below. SOT23-3 Mechanical Specifications Dimensions for CM1214-01ST/SO supplied in a 3-pin SOT23 package are presented below. For complete information on the SOT23-3, 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.
8
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
03/25/05
PRELIMINARY CM1214
Mechanical Details (cont'd)
MSOP-8 Mechanical Specifications: The CM1214-02MS/MR is supplied in an 8-pin MSOP package. 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
H
E
Pin 1 Marking
1
2
3
4
SIDE VIEW
0.30 (typ)
0.012 (typ)
A
SEATING PLANE
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) 2005 California Micro Devices Corp. All rights reserved. 03/25/05
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
9
PRELIMINARY CM1214
Mechanical Details (cont'd)
DFN-03 Mechanical Specifications The CM1214-01DE/DF is supplied in a 3-lead DFN package. Dimensions are presented below. For complete information, see the California Micro Devices DFN Package Information document. Mechanical Package Diagrams
TOP VIEW
D
3 PACKAGE DIMENSIONS
Package JEDEC No. Leads Dim. A A1 A2 A3 b D D2 E E2 e K L L1 L2 R r1 # per tube # per tape and reel 0.075 0.075 TBD 3000 pieces K Controlling dimension: millimeters
This package is compliant with JEDEC standard MO-229, variation VCCC-3F with exception of the "D2" and "E2" dimensions as called out in the table above and the "r1" dimension which is not specified in the MO-229 standard.
2
DFN MO-229 (Var. VCCC-3F) 3 Millimeters Min 0.800 0.000 0.650 0.150 0.180 1.220 0.790 0.20 0.200 TBD 0.290 TBD 0.450 TBD 0.125 0.003 0.003 E2 Nom 0.900 0.025 0.700 0.200 0.200 2.00 BSC 1.320 2.00 BSC 0.890 0.65 0.008 0.008 TBD 0.011 TBD 0.018 TBD 0.005
HEAT SINK SLUG
E
Inches Max 1.00 Min 0.031 0.000 0.026 0.006 0.007 0.048 0.031 Nom 0.035 0.001 0.028 0.008 0.009 0.051 0.035 0.020 Max 0.039 0.002 0.030 0.010 0.011
0.10 C
Pin 1 Marking
0.050 0.750 0.250 0.280 1.420 0.990
L2
1
L2
SIDE VIEW
0.079 BSC 0.056 0.079 BSC 0.040
0.08 C
A1 e
A A3 A2 L1
1
R
0.17 0.30
R1
3
8
D2
52
b L
0.10
M
BOTTOM VIEW
8X CAB
Package Dimensions for 3-Lead DFN
(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
03/25/05

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