E2B0009-27-Y2 ¡ Semiconductor MSM6544 ¡ Semiconductor This version: Nov. 1997 MSM6544 Previous version: Mar. 1996 42-DOT LCD DRIVER GENERAL DESCRIPTION The MSM6544 is a 42-segment duplex driver which can drive the LCD panel up to a maximum of 84 segments. Since the package is a 56-pin small QFP, an LCD module can be compactly configured. An internal RC oscillator is provided for ease of use. FEATURES • • • • • • Power supply voltage (VDD) : 3 to 6V LCD driving voltage : 3 to VDD Operating temperature : –40 to +85°C Applicable LCD panel : 1/2 duty, 84 segments (Max) Data transmitting clock : 4 MHz (Max) Package: 56-pin plastic QFP (QFP56-P-910-0.65-2K) (Product name : MSM6544GS-2K) BLOCK DIAGRAM SEG1 SEG42 42-DOT SEGMENT DRIVER BLANK VDD1 VDD2 42-BIT SELECTOR GND <A> L 42-BIT LATCH <B> L 42-BIT LATCH LOAD DATA DQ 42-BIT SI/PO COMMON DRIVER CLOCK OSC-IN OSC-C OSC-R COM-A OSC 1/32 COM-B VLCM VLCL 1/12 ¡ Semiconductor MSM6544 56 55 54 53 52 51 50 49 48 47 46 45 44 43 SEG28 SEG27 SEG26 SEG25 SEG24 SEG23 SEG22 VDD2 SEG21 SEG20 SEG19 SEG18 SEG17 SEG16 PIN CONFIGURATION (TOP VIEW) 42 41 40 39 38 37 36 35 34 33 32 31 30 29 SEG15 SEG14 SEG13 SEG12 SEG11 SEG10 SEG9 SEG8 SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 15 16 17 18 19 20 21 22 23 24 25 26 27 28 1 2 3 4 5 6 7 8 9 10 11 12 13 14 OSC-IN OSC-C OSC-R LOAD DATA CLOCK VDD1 BLANK GND VLCL COM-A VLCM COM-B SEG1 SEG29 SEG30 SEG31 SEG32 SEG33 SEG34 SEG35 SEG36 SEG37 SEG38 SEG39 SEG40 SEG41 SEG42 56-Pin Plastic QFP 2/12 ¡ Semiconductor MSM6544 PIN DESCRIPTIONS • OSC-IN, OSC-C, OSC-R An RC oscillator circuit for 3-pin type can be configured. Since the OSC-IN pin is in a high input impedance state, it is susceptible to noise. • DATA-IN This is the display data input. When this pin is at "H" level, the segments are turned on and when at "L" level, the segments are turned off. • CLOCK Pin for clocking display data in. Display data is shifted on the rising edge of the clock pulse. • LOAD This is the signal for latching the shift register data. When this pin is set at a "H" level, the shift register data is transmitted to LATCH <A> or LATCH <B>. • SEG1 - SEG42 These pins drive the LCD segments. • COM-A, COM-B These pins drive the LCD commons. COM-A and COM-B correspond to LATCH <A> output and LATCH <B>output, respectively. • VDD2 This is connected to the VDD1 pin internally. • VLCM This is the center bias pin of the LCD. Supply the middle voltage between VDD and VLCL. • VLCL This is the power supply pin of the LCD driver. The contrast of the LCD can be adjusted by changing the voltage at this pin, but do not set the voltage less than the GND level. • BLANK This pin is used to test the all segment outputs (SEG1 to SEG42). All segment outputs are turned off when this pin is set to "H" level. The display returns to the condition before the pin was set to "H" level. • VDD1, GND These are power supply voltage and ground pins. 3/12 ¡ Semiconductor MSM6544 ABSOLUTE MAXIMUM RATINGS Parameter Symbol Condition Rating Unit VDD Ta = 25°C –0.3 to +6.5 V VI Ta = 25°C — GND–0.3 to VDD +0.3 V –55 to +150 °C Supply Voltage Input Voltage TSTG Storage Temperature RECOMMENDED OPERATING CONDITIONS Parameter Symbol Condition Range Unit VDD — 3 to 6 V Supply Voltage Operating Temperature Top — –40 to +85 °C LCD Driving Voltage VLCD VDD–VLCL 3 to VDD V OSC Circuit Parameter Symbol Condition Min. Typ. Max. R0 — 10 — 68 Oscillation Capacitance C0 Film capacitor 0.001 — 0.047 mF OSC-C Current Control Resistance R1 — 33 — 220 kW OSC-IN Common Signal Frequency fCOM — 25 — 250 Hz Oscillation Resistance R0 Unit Applicable Pin kW OSC-R COM-A COM-B (MSM6544) OSC-R C0 OSC-C R1 OSC-IN 4/12 ¡ Semiconductor MSM6544 ELECTRICAL CHARACTERISTICS DC Characteristics (VDD = 5.0V Ta = –40 to +85°C) Symbol Corresponding Pin Condition "H" Input Voltage VIH — 3.6 — VDD V "L" Input Voltage VIL BLANK LOAD DATA CLOCK OSC-IN — GND — 1.0 V Input Leakage Current ILI VI = 5.0V/0V — — ±1 mA OSC-R OSC-C IO = –200mA 4.5 — — V All segment outputs VLCM = 2.5V VLCL = 0V IO= –30mA 4.8 — — V COM-A COM-B VLCM = 2.5V VLCL = 0V IO= –150mA 4.8 — — V COM-A COM-B VLCM = 2.5V VLCL = 0V IO= ±150mA 2.3 — 2.7 V OSC-R OSC-C IO = 200mA — — 0.5 V All segment outputs VLCM = 2.5V VLCL = 0V IO= 30mA — — 0.2 V COM-A COM-B VLCM = 2.5V VLCL = 0V IO= 150mA — — 0.2 V Parameter "H" Output Voltage "M" Output Voltage "L" Output Voltage VOH VOM VOL Min. Typ. Max. Unit Segment Output Impedance RSEG All segment outputs VLCM = (5+VLCL)/2 VLCL = 0 to 2V — — 10 kW Common Output Impedance RCOM COM-A COM-B VLCM = (5+VLCL)/2 VLCL = 0 to 2V — — 1.5 kW Static Supply Current IDD1 Fix all inputs to VDD or GND — — 100 mA Dynamic Supply Current IDD2 No load Ro = 47kW Co = 0.0047mF R1 =150kW — 0.22 0.5 mA VDD 5/12 ¡ Semiconductor MSM6544 Switching Characteristics (VDD = 3.0 to 6.0V, Ta = –40 to +85°C) Parameter Symbol Corresponding Pin Condition Min. Max. Unit — — 4 MHz — 100 — ns — 100 — ns Clock Pulse Frequency ff Clock Pulse "H" Time tfH Clock Pulse "L" Time tfL Data Setup Time tD-f DATA — 80 — ns Data Hold Time tf-D CLOCK — 40 — ns Load Pulse "H" Time tL LOAD — 100 — ns Clock-Load Timing tf-L LOAD — 100 — ns OSC-IN Input Frequency fOSC OSC-IN — — 20 kHz CLOCK VH VH DATA-IN VL VL tD-f tf-D tfH tfL VH VH CLOCK VL VL tf-L tL VH VH LOAD VL (VH = 0.8 VDD, VL = 0.2 VDD) 6/12 ¡ Semiconductor MSM6544 Data Input Timing • DATA input timing for COM-A Invalid data DATA –– –– SEL SEG-DATA (A) –– –– 42 41 40 4 3 2 1 LOAD "L" CLOCK LOAD • DATA input timing for COM-B Invalid data DATA –– –– SEL SEG-DATA (B) –– –– 42 41 40 4 3 2 1 LOAD "H" CLOCK LOAD Output Waveforms COM-A COM-B VDD COM-A off off off VLCM VLCL off VDD COM-B off on off VLCM on SEGn VLCL on off on off on on on on 7/12 ¡ Semiconductor MSM6544 FUNCTIONAL DESCRIPTION Data Input The data input consists of the following three timing sections: i) SEG-DATA section (42-bit) ii) SEL bit section (1-bit) iii) LOAD section A total of 43 bits of 42-bit segment data and 1-bit select bit are taken in the 43-bit shift register at the rising edge of the clock. The segment data corresponds to "L" (segment OFF) and "H" (segment ON). Input the segment data from SEG42 to SEG1 in this order. The select bit following the segment data is a bit used to specify the transmit destination of the segment data. The selection is performed as follows. "L" : LATCH <A> ; corresponds to COM-A "H" : LATCH <B> ; corresponds to COM-B The data from the shift register to LATCH <A> or LATCH <B> is transmitted when the LOAD pin is at the "H" level. The indication corresponding to the transmit destination latch is also changed at the same time that data is transmitted. 8/12 ¡ Semiconductor MSM6544 APPLICATION CIRCUITS COM-B LCD PANEL 1/2 DUTY 84-SEGMENT COM-A VDD RCOM x 2 RLC SEG42 SEG1 VLCM COM-A BLANK MSM6544 LOAD From Controller COM-B RLC VLCL DATA CLOCK VDD1 GND OSC-IN OSC-C OSC-R VLCL VDD R1 C0 R0 RCOM=>1kW R1>=Ro x 3 9/12 ¡ Semiconductor MSM6544 REFERENCE DATA IDD2 vs. VDD Characteristic mA 400 IDD2 Requirements • At no lead and during oscillation • At room temperature • R0 = 47 kW • C0 = 0.0047 mF • R1 = 150 kW 300 200 100 0 1 2 3 4 5 6 7 V VDD 10/12 ¡ Semiconductor MSM6544 fCOM vs. VDD Characteristics Hz 60 Requirements • At room temperature • R0 = 47 kW • C0 = 0.0047 mF • R1 = 150 kW fCOM 55 50 COM-A COM-B 45 1/fCOM 0 1 2 3 4 5 6 7 V VDD fCOM vs. R0 Characteristics Hz 320 240 160 C0 = 0.001mF 120 fCOM 80 C0 = 0.0022mF 60 40 30 C0 = 0.0047mF 20 15 C0 = 0.01mF Requirements • At room temperature • VDD = 5.0 kW • R1 .=. 3R0 10 0 10 15 C0 = 0.047mF 22 33 47 C0 = 0.022mF 68 kW R0 11/12 ¡ Semiconductor MSM6544 PACKAGE DIMENSIONS (Unit : mm) QFP56-P-910-0.65-2K Mirror finish Package material Lead frame material Pin treatment Solder plate thickness Package weight (g) Epoxy resin 42 alloy Solder plating 5 mm or more 0.36 TYP. Notes for Mounting the Surface Mount Type Package The SOP, QFP, TSOP, SOJ, QFJ (PLCC), SHP and BGA are surface mount type packages, which are very susceptible to heat in reflow mounting and humidity absorbed in storage. Therefore, before you perform reflow mounting, contact Oki’s responsible sales person for the product name, package name, pin number, package code and desired mounting conditions (reflow method, temperature and times). 12/12