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參數資料
| 型號： | L3121B |
| 廠商： | 意法半導體 |
| 英文描述： | Programmable Transient Voltage Suppressor for SLIC Protection(可編程瞬變電壓抑制器) |
| 中文描述： | 可編程瞬態電壓抑制器保護的用戶接口（可編程瞬變電壓抑制器） |
| 文件頁數： | 1/7頁 |
| 文件大小： | 64K |
| 代理商： | L3121B |
ApplicationSpecific Discretes
A.S.D.
L3121B
PROGRAMMABLE TRANSIENT VOLTAGE
SUPPRESSOR FOR SLIC PROTECTION
February 1998 - Ed: 3
BIDIRECTIONALFUNCTIONWITHVOLTAGE
PROGRAMMABILITYIN BOTHPOSITIVE
AND NEGATIVEPOLARITIES.
PROGRAMMABLEBREAKDOWNVOLTAGE
UP TO100 V.
HOLDINGCURRENT = 150mA min.
HIGHSURGE CURRENT CAPABILITY.
I
PP
= 100A, 10/1000
μ
s
FEATURES
This device has been especially designed to
protect a subscriber line interface circuit (SLIC)
with an integratedring generator.
Used with the recommended application circuit,
each line (TIP and RING) is protected against
positive and negative surges. In the positive
polarity, the breakdown voltage is referenced to
the + VB , and in the negative polarity, the
breakdownvoltage is referencedto the -Vbat.
Itshigh surgecurrentcapabilitymakesthe L3121B
a reliable protection device for very exposed
equipment,or when series resistorsare very low.
DESCRIPTION
CONNECTION DIAGRAM
SIP4
CCITTK20
10/700
μ
s
5/310
10/700
μ
s
5/310
0.5/700
μ
s
0.2/310
μ
s
1 kV
25 A
2
50 A
1 kV
25 A
μ
s
VDE0433
kV
μ
s
CNET
INACCORDANCE WITH FOLLOWING
STANDARDS
Gate N
Gate P
GND
Line
SCHEMATIC DIAGRAM
TM: ASD is trademarks ofSGS-THOMSON Microelectronics.
1/7
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