STLC3055N WLL and ISDN-TA subscriber line interface circuit

The STLC3055N is a SLIC device specifically designed for wireless local loop (WLL) and ISDNterminal adaptors (ISDN-TA) and VoIP applications. One of the distinctive characteristic of this device is the ability to operate with a single supply voltage (from 5.5 V to 12 V) and self generate the negative battery by means of an on chip DC/DC converter controller that drives an external MOS switch.

The battery level is properly adjusted depending on the operating mode. A useful characteristic for these applications is the integrated ringing generator.

The control interface is a parallel type with open drain output and 3.3 V logic levels.

The metering pulses are generated on chip starting from two logic signals (0 and 3.3 V) one define the metering pulse frequency and the other the metering pulse duration. An on chip circuit then provides the proper shaping and filtering.

Metering pulse amplitude and shaping (rising and decay time) can be programmed by external components. A dedicated cancellation circuit avoid possible codec input saturation due to metering pulse echo.

Constant current feed can be set from 20 mA to 40 mA. Off-hook detection threshold is programmable from 5 mA to 9 mA.

The device, developed in BCD III S technology (90 V process), operates in the extended temperature range and integrates a thermal protection that sets the device in power down when Tj exceeds 140 °C.

技术特性

Monochip subscriber line interface circuit (SLIC) optimised for WLL and VoIP applications
Implement all key features of the BORSHT function
Single supply (5.5 V to 12 V)
Built in DC/DC converter controller
Soft battery reversal with programmable transition time.
On-hook transmission.
Programmable off-hook detector threshold
Metering pulse generation and filter
Integrated ringing
Integrated ring trip
Parallel control interface (3.3 V logic level)
Programmable constant current feed
Surface mount package
Integrated thermal protection
Dual gain value option
BCD III S, 90 V technology
-40 to +85 °C operating range

功能框图

STLC3055N 订购信息

订购型号	产品状态	美金价格	数量	封装	包装形式	温度范围	材料声明
E-STLC3055N	Active			LQFP 44 10x10x1.4	Tray		E-STLC3055N
STLC3055N	Active			LQFP 44 10x10x1.4	Tray		STLC3055N

DATASHEET

描述	版本	大小
STLC3055N : WLL and ISDN-TA subscriber line interface circuit	11	320KB

APPLICATION NOTES

描述	版本	大小
AN2117: STLC3055N SINGLE SUPPLY SLIC FOR WILL APPLICATION	2	166KB

USER MANUALS

描述	版本	大小
UM0270: Evaluation board with STLC3055N SLIC for WLL	1	375KB