M492247A, M494, M494B1 Selling Leads, Datasheet
MFG:SHINDENG Package Cooled:N/A D/C:04+
M492247A, M494, M494B1 Datasheet download
Part Number: M492247A
MFG: SHINDENG
Package Cooled: N/A
D/C: 04+
M492247A, M494, M494B1
- Table of contents:
Info of M492247A
Info of M494
Info of M494B1
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About M490B
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Datasheet: M490B
File Size: 1168102 KB
Manufacturer: STMICROELECTRONICS [STMicroelectronics]
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About M494
PDF/DataSheet Download
Datasheet: M494
File Size: 229370 KB
Manufacturer: STMICROELECTRONICS [STMicroelectronics]
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About M494B1
PDF/DataSheet Download
Datasheet: M494B1
File Size: 229370 KB
Manufacturer: STMICROELECTRONICS [STMicroelectronics]
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M494 General Description
The M494 is a monolithic LSI integrated circuit fabricated in SGS-THOMSON'sEPM2 process; an N-channel, Planox, double poly MOS process capable of including a floating gate NV memory cell (EEPROM).
The i.c. has been designed as a complete digital TV tuning system based on the voltage synthesis principle and as a replacement for all the conventional potentiometers and band switches particularly in low cost TV sets. It also provides some functions normally only associated with higher cost sets. NVmemory is integrated on the chip together with all the necessarycontrol circuitry to providethe program memory. Separate NV memory is also integrated to provide the memory for four analog controls. A seven segment LED display can be directly driven by the chip to display the program selected, and the direction of movement of the analog controls. Provision is made for a remote control receiver both on and off chip, the latter is interfaced via a data input and single control line. (This enables control by a microprocessor). Alocal keyboard can be used with the device in a variety of configurations. An option select pin provides for different program number options, power up options and skip associated functions. This device is another significant step towards the complete integration of TV control circuitry.
The device is packaged in a 40 pin DIL plastic package.
M494 Maximum Ratings
|
Symbol |
Parameter |
Value |
Unit |
| VDD | Supply Voltage |
0.3 to + 7 |
V |
| VPP | Memory Supply Voltage |
0.3 to + 26 |
V |
| VI | Input Voltage |
0.3to + 15 |
V |
| VO (off) | Off State Input Voltage |
15 |
V |
| IOL | Output Low Current LED Driver Outputs : pin a-g pin h + i All other Outputs |
20 35 5 |
mA mA mA |
| tpd | Max. Delay between Memory Timing and Memory Supply Pulses |
5 |
S |
| Ptot | Total Package Power Dissipation |
1 |
W |
| Tstg | Storage Teperature |
25 to + 125 |
|
| Top | Operating Temperature |
0 to + 70 |
|
| Cos | Capacitance on Option Select Pin |
100 |
pF |
| Ros | Resistance on Option Select Pin |
1 |
k |
| Cdk | Capacitance on data outputs & keyboard inputs when lines are connected by a keyboard switch closure |
150 |
pF |
| Rk | Series Resistance of Single Keyboard Switch |
10 |
k |
| Crts | Capacitance on Data Handshake Pin |
50 |
pF |
Stresses above those under "Absolute Maximum Ratings" may causes permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
M494 Features
·NON-VOLATILE MEMORY FOR 20 PROGRAM WORDS (17 BIT x 20)
- TUNING VOLTAGE 12 BITS
- BAND 2 BITS
- MULTI STANDARD 2 BITS
- PROGRAMSKIP BIT 1 BIT
- 10,000 MODIFY CYCLES PER WORD
- MIN. 10 YEARSDATARETENTION
·13 BITVOLTAGESYNTHESIZER(BRM +PWM)
· NV MEMORY FOR 4 ANALOG CONTROLS (6 BIT x 4)
·4 BANDSWITCH OUTPUTS (VHF I & III, UHF, CATV)
·5 x 7 KEYBOARD
·2 AUDIOVISUAL OUTPUTS (VCR & PC)
·2 CODED MULTI STANDARD OUTPUTS (e.g. PAL, SECAM, NTSC etc.)
·DIRECT 11/2 DIGIT 7 SEGMENT COMMON
ANODE LED DISPLAYDRIVING
·PCM REMOTE CONTROL RECEIVER (M708 transmitter)
·5-BIT DATA INPUT + CONTROL LINE FOR P INTERFACE
·LINEAR AFC DEFEAT OUTPUT
·FLYBACK/SYNC .COINCIDENCE INPUT FOR
·SEMI-AUTOMATIC SEARCH
·STANDBY OUTPUT
·OPTION SELECT : 16 OR 20 PROGRAMS
·POWER UP MODE .
·PROGRAM SKIP DEFEAT
·AV OPTIONS
·1 * OR DECADE MODE OPTION IN 20 PRO.
GRAM OPTION
·TEMPORARY ANALOG UP/DOWN INDICA.
TOR ON LED DISPLAY
·BAND SKIP OPTION
·455 TO510kHzCHEAP CERAMIC RESONATOR
·VDD = 5V ± 5%. VPP = 25V ± 1V
M494 Connection Diagram
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