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Ordering number : ENN4966C
CMOS IC
LC75842E, LC75842M
General-Purpose 1/2 Duty LCD Display Driver
Overview
The LC75842E and LC75842M are 1/2 duty generalpurpose LCD display drivers for applications such as microprocessor-controlled electronic tuning. They can drive up to 54 segments directly.
Package Dimensions
unit: mm 3162C-QFP36
[LC75842E]
0.5 9.0 7.0
Features
* 1/2 duty, 1/2 bias drive of up to 54 segments * Serial data input supports CCB* format communication with the system controller. * Backup function which is based on a power saving mode and all segments off functions that are controlled by serial data. * High generality, since display data is displayed directly without decoder intervention. * The display can be forced to the off state with the INH pin. * RC oscillator circuit
* * CCB is a trademark of SANYO ELECTRIC CO., LTD. * CCB is SANYO's original bus format and all the bus addresses are controlled by SANYO.
27
19 18
28
36 1
0.65 (0.9) 1.7max 0.3
10 9
0.15
0.1
(1.5)
7.0 9.0
SANYO: QFP36
unit: mm 3204-MFP36S
[LC75842M]
SANYO: MFP36S
Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft's control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications. SANYO assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO products described or contained herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
92501TN (OT)/41096HA (OT)/61595HA (OT) No. 4966-1/10
LC75842E, LC75842M
Specifications
Absolute Maximum Ratings at Ta = 25C, VSS = 0 V
Parameter Maximum supply voltage Input voltage Output voltage Output current Allowable power dissipation Operating temperature Storage temperature Symbol VDD max VIN1 VIN2 VOUT IOUT1 IOUT2 Pd max Topr Tstg VDD CE, CL, DI, INH OSC OSC, S1 to S27, COM1, COM2 S1 to S27 COM1, COM2 Ta = 85C Conditions Ratings -0.3 to +6.5 -0.3 to +6.5 -0.3 to VDD + 0.3 -0.3 to VDD + 0.3 100 1 100 -40 to +85 -55 to +125 Unit V V V V A mA mW C C
Allowable Operating Ranges at Ta = -40 to +85C, VSS = 0 V
Parameter Supply voltage Input high level voltage Input low level voltage Recommended external resistance Recommended external capacitance Guaranteed oscillator range Low level clock pulse width High level clock pulse width Data setup time Data hold time CE wait time CE setup time CE hold time INH switching time Symbol VDD VIH VIL ROSC COSC fOSC toL toH tds tdh tcp tcs tch tc VDD CE, CL, DI, INH CE, CL, DI, INH OSC OSC OSC CL: Figure 1 CL: Figure 1 CL, DI: Figure 1 CL, DI: Figure 1 CE, CL: Figure 1 CE, CL: Figure 1 CE, CL: Figure 1 INH, CE: Figure 3 25 160 160 160 160 160 160 160 10 Conditions Ratings min 4.0 0.8 VDD 0 68 680 50 100 typ 5.0 max 6.0 6.0 0.2 VDD Unit V V V k pF kHz ns ns ns ns ns ns ns s
Electrical Characteristics in the Allowable Operating Ranges
Parameter Hysteresis voltage Input high level current Input low level current Output high level voltage Symbol VH IIH IIL VOH1 VOH2 VOL1 VOL2 VMID1 VMID2 fOSC IDD1 IDD2 Conditions CE, CL, DI, INH: VDD = 5.0 V CE, CL, DI, INH: VI = 6.0 V CE, CL, DI, INH: VI = 0 V S1 to S27: IO = -10 A COM1, COM2: IO = -100 A S1 to S27: IO = 10 A COM1, COM2: IO = 100 A COM1, COM2: VDD = 6.0 V, IO = 100 A COM1, COM2: VDD = 4.0 V, IO = 100 A OSC: ROSC = 68 k, COSC = 680 pF Power saving mode VDD = 6.0 V, output open, fOSC = 50 kHz 1.2 2.4 1.4 40 3.0 2.0 50 -5.0 VDD - 1.0 VDD - 0.6 1.0 0.6 3.6 2.6 60 5 2.0 Ratings min typ 0.4 5.0 max Unit V A A V V V V V V kHz A mA
Output low level voltage
Output middle level voltage Oscillator frequency Current drain
No. 4966-2/10
LC75842E, LC75842M 1. When CL is stopped at the low level
VIH CE toH toL VIL VIH 50% VIL VIH DI VIL tds tdh
CL
tcp
tcs
tch
2. When CL is stopped at the high level
VIH CE toL toH VIL VIH 50% VIL VIH DI VIL tds tdh
A03902
CL
tcp
tcs
tch
Figure 1 Pin Assignments
S27 S26 S25 S24 S23 S22 S21 S20 S19 19 18
OSC VDD INH VSS CE CL DI COM2 COM1
S18 S17 S16 S15
36
LC75842E
S14 S13 S12 S11 1
36 1 9
10
S10
Top view
CL DI COM2 COM1 S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13 S14
Top view
S1
S2
S3
S4
S5
S6
S7
S8
S9
A03195
CE VSS INH VDD OSC S27 S26 S25 S24 S23 S22 S21 S20 S19 S18 S17 S16 S15 19
27 28
LC75842M
18
No. 4966-3/10
LC75842E, LC75842M Block Diagram
COM1 COM2 S25 S26 S27 S1
COMMON DRIVER
SEGMENT DRIVER & LATCH
OSC INH VDD
CLOCK GENERATOR
SHIFT REGISTER
CCB INTERFACE VSS
CL
CE
DI
A03196
Pin Functions
Pin S1 to S27 COM1 COM2 OSC Pin No. LC75842E LC75842M 1 to 27 36 35 28 5 to 31 4 3 32 Function Segment outputs for displaying the display data transferred by serial data input. Common driver outputs. The frame frequency fO is fOSC/512 Hz. Oscillator connection. An oscillator circuit is formed by connecting an external resistor and capacitor at this pin. Serial data transfer inputs. Must be connected to the control microprocessor. CE: Chip enable CL: Synchronization clock DI: Transfer data Display off control input INH = low (VSS) .....Display off (S1 to S27, COM1 and COM2 = low) INH 30 34 INH = high (VDD)....Display on However, serial data transfer is possible when the display is forced off by this pin. VDD VSS 29 31 33 35 Power supply. Provide a power supply voltage of between 4.0 and 6.0 V. Power supply. Connect this pin to ground. -- -- -- -- -- -- L I GND Active -- -- I/O O O Handling when unused Open Open
--
I/O
VDD
CE CL DI
32 33 34
36 1 2
H I -- GND
No. 4966-4/10
LC75842E, LC75842M Serial Data Transfer Format 1. When CL is stopped at the low level
CE
CL
DI
0 B0
0 B1
1 B2
0 B3
0 A0
0 A1
1 A2
0 A3
D1
D2
D3
D25 D26 D27 D28 BU
SC
0
0
CCB address 8 bits
Display data 28 bits
Control data 4 bits
CE
CL
DI
0 B0
0 B1
1 B2
0 B3
0 A0
0 A1
1 A2
0 A3
D29
D30 D31
D53 D54
0
0
0
0
0
1
CCB address 8 bits
Display data 26 bits
Fixed data 6 bits
A03197
No. 4966-5/10
LC75842E, LC75842M 2. When CL is stopped at the high level
CE
CL
DI
0 B0
0 B1
1 B2
0 B3
0 A0
0 A1
1 A2
0 A3
D1
D2
D3
D25 D26 D27 D28 BU
SC
0
0
CCB address 8 bits
Display data 28 bits
Control data 4 bits
CE
CL
DI
0 B0
0 B1
1 B2
0 B3
0 A0
0 A1
1 A2
0 A3
D29 D30 D31
D53 D54
0
0
0
0
0
1
CCB address 8 bits
Display data 26 bits
Fixed data 6 bits
Figure 2 * CCB address......44H * D1 to D54..........Display data Dn (n = 1 to 54) = 1: Segment on Dn (n = 1 to 54) = 0: Segment off * BU .....................Control data for specifying normal mode or power saving mode * SC......................Control data for specifying all segments on or off Serial Data Transfer Example When 29 or more segments are used all 80 bits of the serial data must be sent.
0 B0 0 B1 1 B2 0 B3 0 A0 0 A1 1 A2 0 A3 D1 D2 D3 D25 D26 D27 D28 BU SC 0 0
0 B0
0 B1
1 B2
0 B3
0 A0
0 A1
1 A2
0 A3
D29 D30 D31
D53 D54
0
0
0
0
0
1
When fewer than 29 segments are used only the first 40 bits of the serial data can be sent. However, all 80 bits must be sent after power is first applied.
0 B0 0 B1 1 B2 0 B3 0 A0 0 A1 1 A2 0 A3 D1 D2 D3 D25 D26 D27 D28 BU SC 0 0
Note: The following type of transfer cannot be used when fewer than 29 segments are used.
0 B0 0 B1 1 B2 0 B3 0 A0 0 A1 1 A2 0 A3 D29 D30 D31 D53 D54 0 0 0 0 0 1
No. 4966-6/10
LC75842E, LC75842M Control Data Functions 1. BU: Control data for specifying normal mode or power saving mode This control data bit is used to control the normal mode/power saving mode state of the LC75842E and LC75842M.
BU 0 1 Normal mode Power saving mode (The OSC pin oscillator is stopped and the common and segment output pins go to the VSS level.) Mode
2. SC: Control data for specifying all segments on or off This control data bit is used to turn all segments on or off.
SC 0 1 Display state On Off
Note that when SC is 1 the display is turned off by outputting the segment off waveforms from the segment pins. Correspondence between Display Data and Segment Output Pins
Segment output pin S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 COM1 D1 D3 D5 D7 D9 D11 D13 D15 D17 D19 D21 D23 D25 D27 COM2 D2 D4 D6 D8 D10 D12 D14 D16 D18 D20 D22 D24 D26 D28 Segment output pin S15 S16 S17 S18 S19 S20 S21 S22 S23 S24 S25 S26 S27 COM1 D29 D31 D33 D35 D37 D39 D41 D43 D45 D47 D49 D51 D53 COM2 D30 D32 D34 D36 D38 D40 D42 D44 D46 D48 D50 D52 D54
For example, the table below lists the output states for the S11 segment output pin.
Display data D21 0 0 1 1 D22 0 1 0 1 Segment output pin (S11) state Both segments for COM1 and COM2 are off. Segment for COM2 is on. Segment for COM1 is on. Both segments for COM1 and COM2 are on.
No. 4966-7/10
LC75842E, LC75842M Output Waveforms (1/2 duty, 1/2 bias drive)
COM1
VDD 1/2VDD VSS VDD 1/2VDD VSS
COM2
fOSC [Hz] 512
S1 to S27 output when LCD segments corresponding to COM1 are on
VDD VSS
S1 to S27 output when LCD segments corresponding to COM2 are on
VDD VSS
S1 to S27 output when LCD segments corresponding to both COM1 and COM2 are on
VDD VSS
S1 to S27 output when LCD segments corresponding to both COM1 and COM2 are turned off
VDD VSS
A03198
INH and Display Control Since the IC internal data (D1 to D54 and control data) is undefined when power is first applied, the display is turned off (S1 to S27, COM1 and COM2 = low) by setting INH pin low at the same time as power is applied. Then, meaningless display at the power on can be prevented by transferring all 80 bits of serial data from the controller while the display is turned off and INH pin high after the transfer completes. (See Figure 3.)
VDD R INH C
A03199
VDD
INH t1 CE Display data and control data transfer Internal data Undefined tc
VIL
VIL t1 : Determined by the RC circuit Defined tc : 10 s min.
A03200
Figure 3
No. 4966-8/10
LC75842E, LC75842M Notes on Transferring Display Data from the Controller Since the LC75842E and LC75842M take the display data (D1 to D54) in two separate transfer operations as shown in Figure 2, we recommend that all the display data be transferred within 30 [ms] to maintain the quality of the displayed image. Sample Display
Example in which 40 segments are used (up to 54 segments can be used)
z FM MW LW
x
~
~
~
z
x CH MHz kHz
STEREO x
MONO x
AUTO TUNE x
Note: The numbers in circles indicate the number of segments.
Sample Application Circuit 1
680 pF +5V OSC 68 k VDD + INH VSS CE From the controller CL DI S26 S27 COM2 S1 S2 COM1 LCD panel (up to 54 segments)
A03201
Sample Application Circuit 2
680 pF +5V OSC 68 k VDD + INH VSS From the controller CE CL DI S26 S27 COM2 S1 S2 COM1 LCD panel (up to 54 segments)
A03202
No. 4966-9/10
LC75842E, LC75842M
Specifications of any and all SANYO products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's products or equipment. SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO products (including technical data, services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining the export license from the authorities concerned in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of SANYO Electric Co., Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the SANYO product that you intend to use. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. 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 September, 2001. Specifications and information herein are subject to change without notice. PS No. 4966-10/10

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