MMQA Quad Common
Anode Series
Preferred Devices
SC−74 Quad Monolithic
Common Anode
Transient Voltage Suppressors
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:
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SC−74 QUAD TRANSIENT
VOLTAGE SUPPRESSOR
24 WATTS PEAK POWER
5.6 − 33 VOLTS
PIN ASSIGNMENT
1
2
6
1
SC−74
PLASTIC
CASE 318F
3
PIN 1.
2.
3.
4.
5.
6.
6
5
4
CATHODE
ANODE
CATHODE
CATHODE
ANODE
CATHODE
•
SC−74 Package Allows Four Separate Unidirectional Configurations
•
Peak Power − Min. 24 W @ 1.0 ms (Unidirectional),
•
•
•
•
•
per Figure 5 Waveform
Peak Power − Min. 150 W @ 20
ms
(Unidirectional),
per Figure 6 Waveform
Maximum Clamping Voltage @ Peak Pulse Current
Low Leakage < 2.0
mA
ESD Rating of Class N (exceeding 16 kV) per the
Human Body Model
Pb−Free Packages are Available
THERMAL CHARACTERISTICS
(T
A
= 25°C unless otherwise noted)
Characteristic
Peak Power Dissipation @ 1.0 ms (Note 1)
@ T
A
≤
25°C
Peak Power Dissipation @ 20
ms
(Note 2) @
T
A
≤
25°C
Total Power Dissipation on FR-5 Board
(Note 3) @ T
A
= 25°C
Thermal Resistance from Junction−to−Ambi-
ent
Total Power Dissipation on Alumina Sub-
strate (Note 4) @ T
A
= 25°C
Derate above 25°C
Thermal Resistance from Junction−to−Ambi-
ent
Junction and Storage Temperature Range
Lead Solder Temperature − Maximum (10
Second Duration)
Symbol
P
pk
P
pk
°P
D
°
R
qJA
°P
D
°
Value
24
150
°225
1.8
556
°300
2.4
417
°−
55 to
+150°
260
Unit
W
W
°mW°
mW/°C
°C/W
°mW
mW/°C
xxx
M
= Device Code
= Date Code
MARKING DIAGRAM
xxx
ORDERING INFORMATION
R
qJA
T
J
, T
stg
T
L
°C/W
°C
See detailed ordering and shipping information in the table on
page 5 of this data sheet.
DEVICE MARKING INFORMATION
°C
See specific marking information in the device marking table
on page 5 of this data sheet.
Preferred
devices are recommended choices for future use
and best overall value.
©
Semiconductor Components Industries, LLC, 2004
1
April, 2004 − Rev. 4
Publication Order Number:
MMQA/D
M
MMQA Quad Common Anode Series
ELECTRICAL CHARACTERISTICS
(T
A
= 25°C 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) (V
F
= 0.9 V Max @ I
F
= 10 mA)
Max
Reverse
Leakage
Current
Max Zener
Impedance
(Note 7)
Z
ZT
@ I
ZT
(W) (mA)
400
300
300
80
80
80
80
80
80
80
100
125
150
200
Max
Reverse
Voltage @
I
RSM
(Note 6)
(Clamping
Voltage)
V
RSM
(V)
8.0
9.0
9.8
17.3
18.6
21.7
26
28.6
30.3
31.7
34.6
39
43.3
48.6
Capacitance
@ 0 Volt
Bias, 1 MHz
Breakdown Voltage
V
ZT
(Note 5)
(V)
Device
MMQA5V6T1,T3
MMQA6V2T1,T3
MMQA6V8T1,T3
MMQA12VT1,T3
MMQA13VT1
MMQA15VT1,T3
MMQA18VT1,T3
MMQA20VT1,T3
MMQA21VT1,T3
MMQA22VT1,T3
MMQA24VT1,T3
MMQA27VT1,T3
MMQA30VT1,T3
MMQA33VT1,T3
1.
2.
3.
4.
5.
6.
7.
Min
5.32
5.89
6.46
11.4
12.4
14.3
17.1
19
20
20.9
22.8
25.7
28.5
31.4
Nom
5.6
6.2
6.8
12
13
15
18
20
21
22
24
27
30
33
Max
5.88
6.51
7.14
12.6
13.7
15.8
18.9
21
22.1
23.1
25.2
28.4
31.5
34.7
@ I
ZT
(mA)
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
I
R
(nA)
2000
700
500
75
75
75
75
75
75
75
75
75
75
75
V
R
(V)
3.0
4.0
4.3
9.1
9.8
11
14
15
16
17
18
21
23
25
Max
Reverse
Surge
Current
I
RSM
(A)
3.0
2.66
2.45
1.39
1.29
1.1
0.923
0.84
0.792
0.758
0.694
0.615
0.554
0.504
Maximum
Temperature
Coefficient
of V
Z
(mV/°C)
1.26
10.6
10.9
14
15
16
19
20.1
21
22
25
28
32
37
(pF)
Min
−
−
100
−
−
−
−
−
−
−
−
−
−
−
Max
−
−
250
−
−
−
−
−
−
−
−
−
−
−
Non-repetitive current pulse per Figure 5 and derate above T
A
= 25°C per Figure 4.
Non-repetitive current pulse per Figure 6 and derate above T
A
= 25°C per Figure 4.
FR-5 = 1.0 x 0.75 x 0.62 in.
Alumina = 0.4 x 0.3 x 0.024 in., 99.5% alumina
V
Z
measured at pulse test current I
T
at an ambient temperature of 25°C.
Surge current waveform per Figure 5 and derate per Figure 4.
Z
ZT
is measured by dividing the AC voltage drop across the device by the AC current supplied. The specified limits are I
Z(AC)
= 0.1 I
Z(DC)
,
with AC frequency = 1 kHz.
TYPICAL CHARACTERISTICS
300
250
C, CAPACITANCE (pF)
200
150
100
50
0
5.6
0
5.6
6.8
20
27
BIASED AT 0 V
BIASED AT 1 V
BIASED AT 50%
OF V
Z
NOM
10,000
1,000
I R , LEAKAGE (nA)
+150°C
+25°C
10
−40°C
100
6.8
12
20
27
V
Z
, NOMINAL ZENER VOLTAGE (V)
33
33
V
Z
, NOMINAL ZENER VOLTAGE (V)
Figure 1. Typical Capacitance
Figure 2. Typical Leakage Current
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2
MMQA Quad Common Anode Series
TYPICAL CHARACTERISTICS
PEAK PULSE DERATING IN % OF PEAK POWER
OR CURRENT @ TA = 25
°
C
300
PD , POWER DISSIPATION (mW)
250
200
150
100
50
0
0
25
50
75
100
125
150
175
100
90
80
70
60
50
40
30
20
10
0
0
25
50
75
100
125
150
175
200
ALUMINA SUBSTRATE
FR-5 BOARD
T
A
, AMBIENT TEMPERATURE (°C)
T
A
, AMBIENT TEMPERATURE (°C)
Figure 3. Steady State Power Derating Curve
Figure 4. Pulse Derating Curve
100
VALUE (%)
PEAK VALUE − I
RSM
% OF PEAK PULSE CURRENT
t
r
PULSE WIDTH (t
P
) IS DEFINED
AS THAT POINT WHERE THE
PEAK CURRENT DECAYS TO 50%
OF I
RSM
.
t
r
≤
10
ms
I
RSM
2
100
90
80
70
60
50
40
30
20
10
0
t
r
PEAK VALUE I
RSM
@ 8
ms
PULSE WIDTH (t
P
) IS DEFINED
AS THAT POINT WHERE THE
PEAK CURRENT DECAY = 8
ms
HALF VALUE I
RSM
/2 @ 20
ms
HALF VALUE −
50
t
P
0
t
P
0
1
2
3
t, TIME (ms)
4
0
20
40
t, TIME (ms)
60
80
Figure 5. 10
×
1000
ms
Pulse Waveform
Figure 6. 8
×
20
ms
Pulse Waveform
100
Ppk PEAK SURGE POWER (W)
PPK , PEAK SURGE POWER (W)
RECTANGULAR
WAVEFORM, TA = 25°C
200
180
160
140
120
100
80
60
40
20
0
10
×
100 WAVEFORM AS PER FIGURE 5
8
×
20 WAVEFORM AS PER FIGURE 6
10
UNIDIRECTIONAL
1.0
0.1
1.0
10
PW, PULSE WIDTH (ms)
100
1000
5.6
6.8
12
20
NOMINAL V
Z
27
33
Figure 7. Maximum Non−Repetitive Surge
Power, Ppk versus PW
Power is defined as V
RSM
x I
Z
(pk) where V
RSM
is the clamping voltage at I
Z
(pk).
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3
Figure 8. Typical Maximum Non−Repetitive
Surge Power, Ppk versus V
BR
MMQA Quad Common Anode Series
TYPICAL COMMON ANODE APPLICATIONS
A quad junction common anode design in a SC−74
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. A simplified example of
MMQA Series Device applications is illustrated below.
Computer Interface Protection
A
KEYBOARD
TERMINAL
PRINTER
ETC.
B
I/O
C
D
FUNCTIONAL
DECODER
GND
MMQA SERIES DEVICE
Microprocessor Protection
V
DD
V
GG
ADDRESS BUS
RAM
ROM
DATA BUS
I/O
CPU
CLOCK
CONTROL BUS
GND
MMQA SERIES DEVICE
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4
MMQA Quad Common Anode Series
DEVICE MARKING AND ORDERING INFORMATION
Device
MMQA5V6T1
MMQA5V6T3
MMQA6V2T1
MMQA6V2T1G
MMQA6V2T3
MMQA6V8T1
MMQA6V8T3
MMQA12VT1
MMQA12VT1G
MMQA12VT3
MMQA13VT1
MMQA15VT1
MMQA15VT3
MMQA18VT1
MMQA18VT3
MMQA20VT1
MMQA20VT3
MMQA20VT3G
MMQA21VT1
MMQA21VT3
MMQA22VT1
MMQA22VT3
MMQA24VT1
MMQA24VT3
MMQA27VT1
MMQA27VT3
MMQA30VT1
MMQA30VT3
MMQA33VT1
MMQA33VT3
Device Marking
5A6
5A6
6A2
6A2
6A2
6A8
6A8
12A
12A
12A
13A
15A
15A
18A
18A
20A
20A
20A
21A
21A
22A
22A
24A
24A
27A
27A
30A
30A
33A
33A
Package
SC−74
SC−74
SC−74
SC−74
(Pb−Free)
SC−74
SC−74
SC−74
SC−74
SC−74
(Pb−Free)
SC−74
SC−74
SC−74
SC−74
SC−74
SC−74
SC−74
SC−74
SC−74
(Pb−Free)
SC−74
SC−74
SC−74
SC−74
SC−74
SC−74
SC−74
SC−74
SC−74
SC−74
SC−74
SC−74
Shipping
†
3,000/Tape & Reel
10,000/Tape & Reel
3,000/Tape & Reel
3,000/Tape & Reel
10,000/Tape & Reel
3,000/Tape & Reel
10,000/Tape & Reel
3,000/Tape & Reel
3,000/Tape & Reel
10,000/Tape & Reel
3,000/Tape & Reel
3,000/Tape & Reel
10,000/Tape & Reel
3,000/Tape & Reel
10,000/Tape & Reel
3,000/Tape & Reel
10,000/Tape & Reel
10,000/Tape & Reel
3,000/Tape & Reel
10,000/Tape & Reel
3,000/Tape & Reel
10,000/Tape & Reel
3,000/Tape & Reel
10,000/Tape & Reel
3,000/Tape & Reel
10,000/Tape & Reel
3,000/Tape & Reel
10,000/Tape & Reel
3,000/Tape & Reel
10,000/Tape & Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
Mechanical Characteristics:
CASE:
Void-free, transfer-molded, thermosetting plastic case.
FINISH:
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 the “T1” with “T3” in the Device Number to order the
13 inch/10,000 unit reel.
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