UT912E-D14-T中文资料

UNISONIC TECHNOLOGIES CO.,

ENCODER FOR REMOTE CONTROLLER

DESCRIPTION

The UTC UT912E of CMOS LSIs for remote control system applications is capable of encoding information which consists of N address bits and 12-N data bits. Each address/data input can be set to one of the two logicstates. The programmed addresses/data are transmitted together with the header bits by a RF or an infrared transmission medium upon receipt of a trigger signal.

UT912E CMOS IC

FEATURES

* Operating voltage: 2.4V ~ 12V

* Low power and high noise immunity CMOS technology * Low standby current (0.1μA (typ.) at VDD=5V) * Minimum transmission word (Four words) * Built-in oscillator needs only 5% resistor * Data code has positive polarity * Minimal external components

*Pb-free plating product number: UT912EL

ORDERING INFORMATION

Ordering Number Normal Lead Free Plating

http://doc.guandang.net

Copyright © 2005 Unisonic Technologies Co.,

PackagePacking

Tube Tube Tube Tube 1

QW-R502-022,B

PIN CONFIGURATION

8-Address

2-Address/Data

8-Address

A0A1A2A3A4A5A6

VDDDOUTOSC1OSC2TEVSSA7

A0A1A2A3A4A5A6A7

VDDDOUTOSC1OSC2TEAD11AD10VSS

DIP-14

SOP-16

8-Address

4-Address/Data

NC

A0A1A2A3A4A5A6A7VSS

VDDDOUTOSC1OSC2TEAD11AD10AD9AD8

A0A1A2A3A4A5A6A7VSS

8-Address

4-Address/Data

NCVDDDOUTOSC1OSC2TEAD11AD10AD9AD8

DIP-18

SOP-20

PIN DESCRIPTION

BLOCK DIAGRAM

DOUT

ABSOLUTE MAXIMUM RATINGS (Ta=25℃)

Supply Voltage VDD Input Voltage VIN Operating Temperature TOPR Storage Temperature TSTG

-0.3 ~ +13 V

Vss-0.3 ~ VDD℃ 0 ~ +70

℃ -40 ~ +150

ELECTRICAL CHARACTERISTICS (Ta=25℃, unless otherwise specified.)

OPERATION FLOWCHART

■

FUNCTIONAL DESCRIPTION

Operation

The UTC UT912E start a cycle of 4-words transmission upon receipt of a transmission enable (TE). A completed cycle is showed as below. This cycle will repeat itself as long as the transmission enable is held low. While the transmission enable returns high the encoder output completes its final cycle and then stops.

Address/data bit waveform

Each programmable address/data pin can be externally set to one of the following two logic states as shown below.

fosc

"One""Zero"

Address/data programming (preset)

The status of each address/data pin can be inpidually pre-set to logic ”high” or ”low”. If a transmission-enable signal is applied, the encoder scans and transmits the status of the 12 bits of address/data serially in the order A0 to AD11. During information transmission these bits are transmitted with a preceding synchronization bit. If the trigger signal is not applied, the chip enters the standby mode and consumes a reduced current of less than 1μA for a supply voltage of 5V.

The following figure shows an application using the UTC UT912E:

SS

Transmitted information:

Pilot & AD8AD9Sync.

Address/Data sequence

The following provides the address/data sequence table for various models of the UTC UT912E encoders. The correct device should be selected according to the inpidual address and data requirements.

Address/

A5A6A7AD8AD9

Date .

TYPICAL APPLICATION CIRCUIT

APPROXIMATE INTERNAL CONNECTIONS

NMOS

CMOS INCMOS OUT

ENOSC1

OSCILLATOR FREQUENCY VS SUPPLY VOLTAGE

Foscunit:KHZ

)

7.006.005.004.003.002.001.00

VDD(VDC)Unit:V

The recommended oscillator frequency is fOSCD (decoder) ≌ 50fOSCE (UT912E encoder)