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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
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MMQA5V6T1
5.6 Volt SC 59 Quad Monolithic Common Anode
MMQA20VT1
Motorola Preferred Devices
Transient Voltage Suppressor for ESD Protection
This quad monolithic silicon voltage suppressor is designed for applications requiring transient overvoltage protection capability. It is intended for use in voltage and ESD sensitive equipment such as computers, printers, business machines, communication systems, medical equipment, and other applications. Its quad junction common anode design protects four separate lines using only one package. These devices are ideal for situations where board space is at a premium. Specification Features: * SC-59 Package Allows Four Separate Unidirectional Configurations * Peak Power -- 24 Watts @ 1.0 ms (Unidirectional), per Figure 7 Waveform * Maximum Clamping Voltage @ Peak Pulse Current * Low Leakage < 2.0 A * ESD Rating of Class N (exceeding 16 kV) per the Human Body Model Mechanical Characteristics: * Void Free, Transfer-Molded, Thermosetting Plastic Case * Corrosion Resistant Finish, Easily Solderable * Package Designed for Optimal Automated Board Assembly * Small Package Size for High Density Applications * Available in 8 mm Tape and Reel Use the Device Number to order the 7 inch/3,000 unit reel. Replace with "T3" in the Device Number to order the 13 inch/10,000 unit reel.
SC-59 QUAD TRANSIENT VOLTAGE SUPPRESSOR 5.6 VOLTS (4) 24 WATTS PEAK POWER
6
5
4
1
2
3
CASE 318F-01 STYLE 1 SC-59 PLASTIC
1 3 4 6 PIN 1. 2. 3. 4. 5. 6. CATHODE ANODE CATHODE CATHODE ANODE CATHODE 2 5
THERMAL CHARACTERISTICS (TA = 25C unless otherwise noted)
Characteristic Peak Power Dissipation @ 1.0 ms (1) @ TA 25C Total Power Dissipation on FR-5 Board (2) @ TA = 25C Derate above 25C Thermal Resistance Junction to Ambient Total Power Dissipation on Alumina Substrate (3) @ TA = 25C Derate above 25C Thermal Resistance Junction to Ambient Junction and Storage Temperature Range Lead Solder Temperature -- Maximum (10 Second Duration) 1. 2. 3. 4. Non-repetitive current pulse per Figure 7 and derate above TA = 25C per Figure 8. FR-5 = 1.0 x 0.75 x 0.62 in. Alumina = 0.4 x 0.3 x 0.024 in., 99.5% alumina Other voltages are available Symbol Ppk PD RJA PD RJA TJ Tstg TL Value 24 225 1.8 556 300 2.4 417 - 55 to +150 260 Unit Watts mW mW/C C/W mW mW/C C/W C C
Thermal Clad is a trademark of the Bergquist Company
Preferred devices are Motorola recommended choices for future use and best overall value.
Rev 3 (c) Motorola, Inc. 1996
MMQA5V6T1 MMQA20VT1
MOTOROLA 1
ELECTRICAL CHARACTERISTICS (TA = 25C unless otherwise noted) UNIDIRECTIONAL (Circuit tied to pins 1, 2, and 5; Pins 2, 3, and 5; Pins 2, 4, and 5; or Pins 2, 5, and 6) (VF = 0.9 V Max @ IF = 10 mA)
Breakdown Voltage VZT(3) (V) Min 5.32 19 Nom 5.6 20 Max 5.88 21 Max Reverse Leakage Current IR @ VR (A) (V) 2.0 0.1 3.0 15 Max Zener Impedance (5) Max Reverse Surge Current IRSM(4) (A) 3.0 0.84 Max Reverse Voltage @ IRSM(4) (Clamping Voltage) VRSM (V) 8.0 28.6 Maximum Temperature Coefficient of VZ (mV/C) 1.26 20.07
@ I ZT (mA) 1 1.0 1.0
ZZT @ IZT () (mA) 400 125
(3) VZ measured at pulse test current IT at an ambient temperature of 25C. (4) Surge current waveform per Figure 5 and derate per Figure 6. (5) ZZT is measured by dividing the AC voltage drop across the device by the AC current supplied. The specfied limits are IZ(AC) = 0.1 IZ(DC), with AC frequency = 1 kHz.
Typical Characteristics
23 VZ, BREAKDOWN VOLTAGE (VOLTS) VZ @ IT MMQA5V6T1 7 MMQA20VT1 22 21 20 UNIDIRECTIONAL 19 18 17 - 40
8 VZ, BREAKDOWN VOLTAGE (VOLTS)
6
5
4 - 50
0
50
100
150
0
25
150
TA, AMBIENT TEMPERATURE (C)
TA, AMBIENT TEMPERATURE (C)
Figure 1. Typical Breakdown Voltage versus Temperature
Figure 2. Typical Breakdown Voltage versus Temperature
10000 IR, REVERSE LEAKAGE CURRENT (nA)
70 60 C, CAPACITANCE (pF) 50 40 30 20 10 UNIDIRECTIONAL MMQA20VT1
1000
100 - 50
0
50
100
150
0
0
2
4
6
8
10
12
14
16
TA, AMBIENT TEMPERATURE (C)
REVERSE VOLTAGE (V)
Figure 3. Typical Leakage Current versus Temperature
Figure 4. Typical Capacitance versus Reverse Voltage
MOTOROLA 2
MMQA5V6T1 MMQA20VT1
Typical Characteristics
300 275 250 C, CAPACITANCE (pF) 225 200 175 150 125 100 75 50 25 0 300 MMQA5V6T1 PD , POWER DISSIPATION (mW) UNIDIRECTIONAL 250 ALUMINA SUBSTRATE 200 150 100 FR-5 BOARD 50 0
0
0.5
1
1.5
2
2.5
3
0
25
50
75
100
125
150
175
REVERSE VOLTAGE (V)
TA, AMBIENT TEMPERATURE (C)
Figure 5. Typical Capacitance versus Reverse Voltage
Figure 6. Steady State Power Derating Curve
tr 100 VALUE (%) PEAK VALUE -- IRSM
PULSE WIDTH (tP) IS DEFINED AS THAT POINT WHERE THE PEAK CURRENT DECAYS TO 50% OF IRSM. tr 10 s
PEAK PULSE DERATING IN % OF PEAK POWER OR CURRENT @ TA = 25 C
100 90 80 70 60 50 40 30 20 10 0 0 25 50 75 100 125 150 175 200
IRSM HALF VALUE -- 2 50 tP 0
0
1
2
3 t, TIME (ms)
4
TA, AMBIENT TEMPERATURE (C)
Figure 7. Pulse Waveform
Figure 8. Pulse Derating Curve
100 RECTANGULAR WAVEFORM, TA = 25C Ppk PEAK SURGE POWER (W)
10 UNIDIRECTIONAL
1.0 0.1
1.0
10 PW, PULSE WIDTH (ms)
100
1000
Figure 9. Maximum Non-repetitive Surge Power, Ppk versus PW Power is defined as VRSM x IZ(pk) where VRSM is the clamping voltage at IZ(pk).
MMQA5V6T1 MMQA20VT1
MOTOROLA 3
TYPICAL COMMON ANODE APPLICATIONS
A quad junction common anode design in a SC-59 package protects four separate lines using only one package. This adds flexibility and creativity to PCB design especially when board space is at a premium. Two simplified examples of MMQA5V6T1 and MMQA20VT1 applications are illustrated below.
Computer Interface Protection
A KEYBOARD TERMINAL PRINTER ETC. B I/O C D FUNCTIONAL DECODER
GND MMQA5V6T1 MMQA20VT1
Microprocessor Protection
VDD VGG ADDRESS BUS
RAM
ROM
DATA BUS I/O CPU CLOCK CONTROL BUS
GND MMQA5V6T1 MMQA20VT1
MOTOROLA 4
MMQA5V6T1 MMQA20VT1
INFORMATION FOR USING THE SC-59 6 LEAD SURFACE MOUNT PACKAGE
MINIMUM RECOMMENDED FOOTPRINT FOR SURFACE MOUNTED APPLICATIONS
Surface mount board layout is a critical portion of the total design. The footprint for the semiconductor packages must be the correct size to ensure proper solder connection inter0.094 2.4
face between the board and the package. With the correct pad geometry, the packages will self-align when subjected to a solder reflow process.
0.037 0.95 0.074 1.9 0.037 0.95 0.028 0.7 0.039 1.0 inches mm
SC-59 6 LEAD SC-59 6 LEAD POWER DISSIPATION
The power dissipation of the SC-59 6 Lead is a function of the pad size. This can vary from the minimum pad size for soldering to a pad size given for maximum power dissipation. Power dissipation for a surface mount device is determined by T J(max), the maximum rated junction temperature of the die, RJA, the thermal resistance from the device junction to ambient, and the operating temperature, TA . Using the values provided on the data sheet for the SC-59 6 Lead package, PD can be calculated as follows: PD = TJ(max) - TA RJA calculate the power dissipation of the device which in this case is 225 milliwatts. PD = 150C - 25C = 225 milliwatts 556C/W
The values for the equation are found in the maximum ratings table on the data sheet. Substituting these values into the equation for an ambient temperature TA of 25C, one can
The 556C/W for the SC-59 6 Lead package assumes the use of the recommended footprint on a glass epoxy printed circuit board to achieve a power dissipation of 225 milliwatts. There are other alternatives to achieving higher power dissipation from the SC-59 6 Lead package. Another alternative would be to use a ceramic substrate or an aluminum core board such as Thermal CladTM. Using a board material such as Thermal Clad, an aluminum core board, the power dissipation can be doubled using the same footprint.
SOLDER STENCIL GUIDELINES
Prior to placing surface mount components onto a printed circuit board, solder paste must be applied to the pads. Solder stencils are used to screen the optimum amount. These stencils are typically 0.008 inches thick and may be made of brass or stainless steel. For packages such as the SC-59, SC-59 6 Lead, SC-70/SOT-323, SOD-123, SOT-23, SOT-143, SOT-223, SO-8, SO-14, SO-16, and SMB/SMC diode packages, the stencil opening should be the same as the pad size or a 1:1 registration.
SOLDERING PRECAUTIONS
The melting temperature of solder is higher than the rated temperature of the device. When the entire device is heated to a high temperature, failure to complete soldering within a short time could result in device failure. Therefore, the following items should always be observed in order to minimize the thermal stress to which the devices are subjected. * Always preheat the device. * The delta temperature between the preheat and soldering should be 100C or less.* * When preheating and soldering, the temperature of the leads and the case must not exceed the maximum temperature ratings as shown on the data sheet. When using infrared heating with the reflow soldering method, the difference should be a maximum of 10C. * Soldering a device without preheating can cause excessive thermal shock and stress which can result in damage to the device.
MMQA5V6T1 MMQA20VT1
MOTOROLA 5
* The soldering temperature and time should not exceed 260C for more than 10 seconds. * When shifting from preheating to soldering, the maximum temperature gradient should be 5C or less. * After soldering has been completed, the device should be allowed to cool naturally for at least three minutes.
Gradual cooling should be used since the use of forced cooling will increase the temperature gradient and will result in latent failure due to mechanical stress. * Mechanical stress or shock should not be applied during cooling.
TYPICAL SOLDER HEATING PROFILE
For any given circuit board, there will be a group of control settings that will give the desired heat pattern. The operator must set temperatures for several heating zones and a figure for belt speed. Taken together, these control settings make up a heating "profile" for that particular circuit board. On machines controlled by a computer, the computer remembers these profiles from one operating session to the next. Figure 8 shows a typical heating profile for use when soldering a surface mount device to a printed circuit board. This profile will vary among soldering systems, but it is a good starting point. Factors that can affect the profile include the type of soldering system in use, density and types of components on the board, type of solder used, and the type of board or substrate material being used. This profile shows temperature versus time. The line on the graph shows the actual temperature that might be experienced on the surface of a test board at or near a central solder joint. The two profiles are based on a high density and a low density board. The Vitronics SMD310 convection/infrared reflow soldering system was used to generate this profile. The type of solder used was 62/36/2 Tin Lead Silver with a melting point between 177 -189C. When this type of furnace is used for solder reflow work, the circuit boards and solder joints tend to heat first. The components on the board are then heated by conduction. The circuit board, because it has a large surface area, absorbs the thermal energy more efficiently, then distributes this energy to the components. Because of this effect, the main body of a component may be up to 30 degrees cooler than the adjacent solder joints.
STEP 1 PREHEAT ZONE 1 "RAMP" 200C
STEP 2 STEP 3 VENT HEATING "SOAK" ZONES 2 & 5 "RAMP"
STEP 4 HEATING ZONES 3 & 6 "SOAK" 160C
STEP 5 HEATING ZONES 4 & 7 "SPIKE" 170C
STEP 6 VENT
STEP 7 COOLING 205 TO 219C PEAK AT SOLDER JOINT
DESIRED CURVE FOR HIGH MASS ASSEMBLIES 150C
150C 100C 100C DESIRED CURVE FOR LOW MASS ASSEMBLIES 50C 140C
SOLDER IS LIQUID FOR 40 TO 80 SECONDS (DEPENDING ON MASS OF ASSEMBLY)
TIME (3 TO 7 MINUTES TOTAL)
TMAX
Figure 10. Typical Solder Heating Profile
MOTOROLA 6
MMQA5V6T1 MMQA20VT1
OUTLINE DIMENSIONS
A L
6 5 1 2 4
S
3
B
D G M 0.05 (0.002) H C K J
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. MAXIMUM LEAD THICKNESS INCLUDES LEAD FINISH THICKNESS. MINIMUM LEAD THICKNESS IS THE MINIMUM THICKNESS OF BASE MATERIAL. INCHES MILLIMETERS DIM MIN MAX MIN MAX 3.10 0.1063 0.1220 A 2.70 1.70 B 0.0512 0.0669 1.30 1.30 0.0394 0.0511 C 1.00 0.50 0.0138 0.0196 D 0.35 1.05 G 0.0335 0.0413 0.85 H 0.0005 0.0040 0.013 0.100 0.26 J 0.0040 0.0102 0.10 0.60 0.0079 0.0236 K 0.20 1.65 L 0.0493 0.0649 1.25 10_ M 0_ 10_ 0_ S 0.0985 0.1181 3.00 2.50 STYLE 1: PIN 1. 2. 3. 4. 5. 6.
CASE 318F-01 ISSUE A SC-59 6 LEAD
CATHODE ANODE CATHODE CATHODE ANODE CATHODE
MMQA5V6T1 MMQA20VT1
MOTOROLA 7
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola 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 consequential or incidental damages. "Typical" parameters can and do vary in different applications. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola 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 Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola 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 Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer. How to reach us: USA / EUROPE: Motorola Literature Distribution; P.O. Box 20912; Phoenix, Arizona 85036. 1-800-441-2447 MFAX: RMFAX0@email.sps.mot.com - TOUCHTONE (602) 244-6609 INTERNET: http://Design-NET.com
JAPAN: Nippon Motorola Ltd.; Tatsumi-SPD-JLDC, Toshikatsu Otsuki, 6F Seibu-Butsuryu-Center, 3-14-2 Tatsumi Koto-Ku, Tokyo 135, Japan. 03-3521-8315 HONG KONG: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park, 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852-26629298
MOTOROLA 8
*MMQA5V6T1/D*
MMQA5V6T1 MMQA20VT1
MMQA5V6T1/D

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