lc75874e Sanyo Semiconductor Corporation, lc75874e Datasheet
lc75874e
Available stocks
Related parts for lc75874e
lc75874e Summary of contents
Page 1
... LCD driver that can be used in applications such as frequency display in products with electronic tuning. In addition to being able to drive up to 264 segments directly, the LC75874E and LC75874W can also control general-purpose output ports. Since the LC75874E and LC75874W use separate power ...
Page 2
... Recommended external capacitance Guaranteed oscillation range Data setup time Data hold time CE wait time CE setup time CE hold time High-level clock pulse width Low-level clock pulse width Rise time Fall time INH switching time LC75874E, 75874W = Symbol Conditions V max max V ...
Page 3
... Current drain I 1 LCD I 2 LCD I 3 LCD Note: *1 Excluding the bias voltage generation divider resistors built in the V LC75874E, 75874W Conditions CE, CL, DI, INH CE, CL, DI, INH 6 CE, CL, DI, INH S66 –20 µA O COM1 to COM4 –100 µ P8 – ...
Page 4
... When CL is stopped at the low level 2. When CL is stopped at the high level Block Diagram LC75874E, 75874W Figure 2 No. 4465-No. 5800-4/16 ...
Page 5
... V 72 LCD driver block power supply. In the range 2 LCD Ground pin. Connect to ground. SS Pin Assignments LC75874E, 75874W Function ) ......Display forced off SS S1/P1 to S8/P8 = low ( (These pins are forcibly set to the segment output port function and held at the V level S66 = low (V ...
Page 6
... Serial Data Transfer Format 1. When CL is stopped at the low level CCB address 8 bits CCB address 8 bits CCB address 8 bits CCB address 8 bits Note the direction data. LC75874E, 75874W Display data 68 bits Display data 68 bits Display data 64 bits Display data 64 bits Control data DD ...
Page 7
... D1 to D264........Display data • .............Segment output port/general-purpose output port switching control data • DR .....................1/2-bias drive or 1/3-bias drive switching control data • SC......................Segments on/off control data • BU .....................Normal mode/power-saving mode control data LC75874E, 75874W Display data 68 bits Display data 68 bits ...
Page 8
... Corresponding display data S1/P1 D1 S2/P2 D5 S3/P3 D9 S4/P4 D13 For example, if the general-purpose output port function is selected for the S4/P4 output pin, that output pin will output a high level (V ) when the display data D13 is 1, and a low level (V LCD LC75874E, 75874W 80 bits 80 bits Output pin state S1/P1 S2/P2 S3/P3 S4/ ...
Page 9
... Normal mode Power saving mode. In this mode, the OSC pin oscillator is stopped and the common and segment output pins go to the V 1 However, the S1/P1 to S8/P8 output pins can be used as general-purpose output ports under the control of the data bits P0 to P3. LC75874E, 75874W Mode level ...
Page 10
... LC75874E, 75874W COM3 COM4 Output pin D3 D4 S34 D7 D8 S35 D11 D12 S36 D15 D16 S37 D19 D20 S38 D23 D24 S39 D27 D28 S40 D31 D32 S41 ...
Page 11
... LCD driver output when only LCD segments corresponding to COM4 are on. LCD driver output when LCD segments corresponding to COM2 and COM4 are on. LCD driver output when all LCD segments corresponding to COM1, COM2, COM3, and COM4 are on. LC75874E, 75874W 1/4-Duty 1/2-Bias Waveforms No. 4465-No. 5800-11/16 ...
Page 12
... LCD driver output when only LCD segments corresponding to COM4 are on. LCD driver output when LCD segments corresponding to COM2, and COM4 are on. LCD driver output when all LCD segments corresponding to COM1, COM2, COM3, and COM4 are on. LC75874E, 75874W 1/4-Duty 1/3-Bias Waveforms No. 4465-No. 5800-12/16 ...
Page 13
... Undefined Notes on Controller Transfer of Display Data Since the LC75874E and LC75874W accept the display data (D1 to D264) divided into four separate transfer operations, we recommend that applications make a point of completing all four data transfers within a period of less than prevent observable degradation of display quality. ...
Page 14
... R ≥ 1 kΩ C ≥ 0.047 µF From the controller Note: *2 When a capacitor except the recommended external capacitance (Cosc = 680 pF) is connected the OSC pin, we recommend that applications connect the OSC pin with a capacitor in the range 220 to 2200 pF. LC75874E, 75874W * General-purpose ...
Page 15
... R ≥ 1 kΩ C ≥ 0.047 µF From the controller Note: *2 When a capacitor except the recommended external capacitance (Cosc = 680 pF) is connected the OSC pin, we recommend that applications connect the OSC pin with a capacitor in the range 220 to 2200 pF. LC75874E, 75874W * General-purpose ...
Page 16
... SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of March, 1998. Specifications and information herein are subject to change without notice. LC75874E, 75874W PS No. 5800-16/16 ...