OM4068 Philips Semiconductors, OM4068 Datasheet
OM4068
Available stocks
Related parts for OM4068
OM4068 Summary of contents
Page 1
... DATA SHEET OM4068 LCD driver for low multiplex rates Product specification File under Integrated Circuits, IC12 INTEGRATED CIRCUITS 1998 Jun 18 ...
Page 2
... GENERAL DESCRIPTION The OM4068 is a low-power CMOS LCD driver, designed to drive Liquid Crystal Displays (LCDs) with low multiplex rates. It generates the drive signals for any static or multiplexed LCD containing up to three backplanes and segment lines and can be easily cascaded for larger LCD applications ...
Page 3
... BP2 BP3 DISPLAY SEGMENT OUTPUTS 4 4 LCD VOLTAGE SELECTOR (CONTROL LOGIC) 4 BIAS VOLTAGE GENERATOR OM4068 POWER-ON TIMING RESET GENERATOR Fig.1 Block diagram. 3 (1) SEG1 to SEG32 32 DISPLAY LATCH SCE SCLK SHIFT REGISTER SDIN SDOUT OSCILLATOR MBK817 Product specification OM4068 ...
Page 4
... LCD segment driver output 19 7 LCD segment driver output 20 8 LCD segment driver output 21 9 LCD segment driver output 22 10 LCD segment driver output 23 11 LCD segment driver output 24 LCD segment driver output 25 12 LCD segment driver output 26 4 Product specification OM4068 DESCRIPTION ...
Page 5
... SCL (serial clock line): input for the bus clock line. 6. SDOUT (serial data output): output of the shift register to allow serial cascading of the OM4068 with other devices. 7. SCE (serial clock enable): input for enable/disable acquisition on the data input line. If disabled, data on the serial bus are not accepted by the device and M1 (display mode select inputs): inputs to select the LCD drive configurations ...
Page 6
... LCD driver for low multiplex rates handbook, full pagewidth SEG30 1 SEG31 2 SEG32 3 V LCD SDIN 9 SCLK 10 SCE 11 1998 Jun 18 OM4068H Fig.2 Pin configuration (QFP44). 6 Product specification OM4068 33 SEG18 SEG17 32 31 SEG16 30 SEG15 29 SEG14 28 SEG13 27 SEG12 26 SEG11 25 SEG10 24 SEG9 23 SEG8 MBK814 ...
Page 7
... SEG23 SEG2 OM4068P 11 30 SEG24 BP3 SEG26 12 29 BP2 SEG27 13 28 BP1 14 27 SEG28 SDOUT 15 26 SEG29 SCE SEG30 16 25 SCLK SEG31 17 24 SDIN SEG32 LCD MBK815 Fig.3 Pin configuration (DIP40). 7 Product specification OM4068 ...
Page 8
... Philips Semiconductors LCD driver for low multiplex rates FUNCTIONAL DESCRIPTION The OM4068 is a low-power LCD driver designed to interface with any microprocessor/microcontroller and a wide variety of LCDs. It can drive any static or multiplexed LCD containing up to three backplanes and segments. Table 1 Selection of display configurations ...
Page 9
... Philips Semiconductors LCD driver for low multiplex rates Power-on reset The on-chip power-on reset block initializes the chip after power-on or power failures. The OM4068 resets to a starting condition as follows: All backplane and segment outputs are set to V (display off) All shift registers and latches are set in 3-state ...
Page 10
... V LCD LCD V SS SEGMENTS SEG Product specification V V off rms on rms ---------------------- - ---------------------- - 0.354 0.791 0.333 0.638 SEG BP1 V LCD LCD V LCD LCD MBK819 = LCD SS OM4068 V on rms D = ---------------------- - V off rms 2.2236 1.915 ...
Page 11
... LCD V LCD V LCD 1/2V LCD 0 V 1/2V LCD V LCD T frame SEGMENTS SEG SEG SEG off on off Product specification OM4068 pagewidth SEG - BP2 V LCD 1/2V LCD 0 V 1/2V LCD V LCD V LCD 1/2V LCD 0 V 1/2V LCD V LCD V LCD 1/2V LCD 0 V 1/2V LCD V LCD V LCD ...
Page 12
... V LCD 2/3V LCD 2/3V LCD 2/3V LCD 2/3V LCD V LCD V LCD V LCD V LCD 2/3V LCD 2/3V LCD 2/3V LCD 2/3V LCD V LCD V LCD SEG - BP2 SEG - BP3 V LCD V LCD 2/3V LCD 2/3V LCD 1/3V LCD 1/3V LCD BP2 off LCD SS OM4068 T frame BP3 ...
Page 13
... LCD display segments is shown in Table 4. Data from the last stage of the register is supplied to the SDOUT pin to allow serial cascading of the OM4068 with other peripheral devices. Depending on the display driving mode selected, SDOUT corresponds to bit 32 the register (see Fig.10). Data on the SDOUT pin is shifted out with the falling edge of the SCLK clock ...
Page 14
... SDIN D1A 1998 Jun 18 Timing The timing of the OM4068 organizes the internal data flow of the device. This includes the transfer of display data from the shift register to the display segments outputs. The timing also generates the LCD frame frequency which is derived from the clock frequency generated in the ...
Page 15
... Philips Semiconductors LCD driver for low multiplex rates handbook, full pagewidth SDIN SCLK 1998 Jun 18 D32A D32B M0 MUX M1 SDOUT Fig.10 Shift register structure. 15 Product specification OM4068 D32C MBK825 ...
Page 16
... D27A D27B D27A D28A D28B D28A D29A D29B D29A D30A D30B D30A D31A D31B D31A D32A D32B D32A 16 Product specification OM4068 TRIPLEX D1B D1C D2B D2C D3B D3C D4B D4C D5B D5C D6B D6C D7B D7C D8B D8C D9B D9C ...
Page 17
... Inputs and outputs are protected against electrostatic discharge in normal handling. However totally safe desirable to take normal precautions appropriate to handling MOS devices (see “Handling MOS Devices” ). 1998 Jun PARAMETER CONDITIONS ) LCD current LCD note 1 note 2 17 Product specification OM4068 MIN. MAX. UNIT 0.5 +6.5 V 0.5 +7 ...
Page 18
... POR 18 Product specification MIN. TYP 2 3 0 1.0 DD 0.5 V; 0.04 0. 100 0 100 bus inactive. SS OM4068 MAX. UNIT 5 1 +100 mV +100 mV ...
Page 19
... SDIN SCE 1998 Jun +105 C; unless otherwise specified. amb PARAMETER SCLKH t SCLKL t PHL(SDOUT) t h(D) t su(D) t su(en)(SDEH-SCLKH) Fig.11 Serial data timing. 19 Product specification OM4068 MIN. TYP. MAX 175 Hz 116 224 405 kHz 0 2.1 MHz 190 ns 190 ns 100 ...
Page 20
... Dimensions in mm. Bonding pad dimensions 1998 Jun OM4068 2.03 mm Fig.12 Bonding pad locations. 20 Product specification SEG18 32 SEG17 31 SEG16 30 SEG15 29 SEG14 28 SEG13 27 SEG12 26 SEG11 25 SEG10 24 SEG9 23 SEG8 MBK816 OM4068 ...
Page 21
... Product specification OM4068 PAD 550.550 1711.100 44 430.550 1711.100 1 300.550 1711.100 2 43.100 1460.050 3 43.100 1274.950 4 43.100 1158.700 1769.6 1696.9 1770 ...
Page 22
... 2.5 scale (1) ( 0.40 0.25 10.1 10.1 12.9 0.8 0.20 0.14 9.9 9.9 12.3 REFERENCES JEDEC EIAJ detail 12.9 0.95 1.3 0.15 0.15 0.1 12.3 0.55 EUROPEAN PROJECTION Product specification OM4068 SOT307 (1) ( 1.2 1 0.8 0.8 0 ISSUE DATE 95-02-04 97-08-01 ...
Page 23
... E 1 1.70 0.53 0.36 52.50 14.1 1.14 0.38 0.23 51.50 13.7 0.067 0.021 0.014 2.067 0.56 0.045 0.015 0.009 2.028 0.54 REFERENCES JEDEC EIAJ MO-015AJ 3.60 15.80 17.42 2.54 15.24 3.05 15.24 15.90 0.14 0.62 0.10 0.60 0.12 0.60 EUROPEAN PROJECTION Product specification OM4068 SOT129 ( max. 0.254 2.25 0.69 0.01 0.089 0.63 ISSUE DATE 92-11-17 95-01-14 ...
Page 24
... A double-wave (a turbulent wave with high upward pressure followed by a smooth laminar wave) soldering technique should be used. The footprint must angle the board direction and must incorporate solder thieves downstream and at the side corners. 24 Product specification OM4068 CAUTION ...
Page 25
... Use only a low voltage soldering iron (less than 24 V) applied to the flat part of the lead. Contact time must be limited to 10 seconds 300 C. When using a dedicated tool, all other leads can be soldered in one operation within seconds between 270 and 320 C. 25 Product specification OM4068 ...
Page 26
... Philips Semiconductors LCD driver for low multiplex rates 1998 Jun 18 NOTES 26 Product specification OM4068 ...
Page 27
... Philips Semiconductors LCD driver for low multiplex rates 1998 Jun 18 NOTES 27 Product specification OM4068 ...
Page 28
... Tel. +46 8 5985 2000, Fax. +46 8 5985 2745 Switzerland: Allmendstrasse 140, CH-8027 ZÜRICH, Tel. +41 1 488 2741 Fax. +41 1 488 3263 Taiwan: Philips Semiconductors, 6F, No. 96, Chien Kuo N. Rd., Sec. 1, TAIPEI, Taiwan Tel. +886 2 2134 2865, Fax. +886 2 2134 2874 Thailand: PHILIPS ELECTRONICS (THAILAND) Ltd., 209/2 Sanpavuth-Bangna Road Prakanong, BANGKOK 10260, Tel ...