ST7LNB0 datasheet(1/22 Pages) STMICROELECTRONICS

No de pièce	ST7LNB0

Description	Diseqc TM 2.1 Slave Microsontroller for LNBs and Switchers

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Fabricant	STMICROELECTRONICS [STMicroelectronics]

Site Internet	http://www.st.com

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December 2004

1/22

Rev. 3.0

ST7LNB0

DiSEqC™ 2.1 Slave Microcontroller for LNBs and Switchers

The ST7LNB0 is an 8-bit microcontroller dedicat-

ed to DiSEqC™ slave operation in LNBs and

switchers, it is compliant with the DiSEqC™ 2.1

level, also it supports backwards compatible (13/

18 V, 22 kHz tone) and toneburst signalling.

■ Clock, Reset and Supply Management

– Reduced power consumption.

– Safe power on/off management by low volt-

age detector (LVD).

– Internal 8 MHz oscillator

■ Communication interface

– One DiSEqC™ 2.1 communication interface

■ Analog interface

– 13/18 V voltage detector

– 22 KHz tone detector

■ I/O ports

– 8 output ports for control of committed and un-

committed switches

– 1 output port for standby control

Figure 1. ST7LNB0 Block Diagram

Table 1. Device Summary

SO16

150”

Features

ST7LNB0Y0M6

Packages

SO16 150”

Peripherals

DiSEqC™ 2.1 communication interface, 22KHz tone detector, 13/18V detector

Operating Voltage

4.5 V t0 5.5 V

Temperature range

-40°C to +85°C

8-BIT CORE

ALU

RESET

8 MHz. RC OSC

Internal

CLOCK

CONTROL

VSS

POWER

SUPPLY

LVD

VDD

SWITCH PORTS

DiSEqC™ 2.1

OP[8:1]

SBY

22KHz tone Detector

13/18 V Detector

DRX

DTX

1

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