ST7LNB0 Datasheet, PDF (1/22 Pages) STMicroelectronics – Diseqc TM 2.1 Slave Microsontroller for LNBs and Switchers

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
Figure 1. ST7LNB0 Block Diagram
SO16
150”
■ I/O ports
– 8 output ports for control of committed and un-
committed switches
– 1 output port for standby control
V_DD
V_SS
RESET
Internal
CLOCK
8 MHz. RC OSC
LVD
POWER
SUPPLY
CONTROL
8-BIT CORE
ALU
DiSEqC™ 2.1
22KHz tone Detector
13/18 V Detector
SWITCH PORTS
DTX
DRX
OP[8:1]
SBY
Table 1. Device Summary
Features
Packages
Peripherals
Operating Voltage
Temperature range
ST7LNB0Y0M6
SO16 150”
DiSEqC™ 2.1 communication interface, 22KHz tone detector, 13/18V detector
4.5 V t0 5.5 V
-40°C to +85°C
Rev. 3.0
December 2004
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