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Ordering number : ENA0575
LC7942KD
Overview
CMOS IC
Dot-Matrix LCD Drivers
The LC7942KD is a common driver LSI for driving large dot-matrix LCD displays. It features a built-in 64-bit bidirectional shift register and a 4-level LCD driver. It can also be connected in cascade to increase the number of bits. The LC7942KD is designed to be used with LC7940KD (QIP100D) or LC7941KDR (QIP100DR) segment drivers to drive large LCD panels.
Features
* 64 built-in LCD display drive circuits * 1/64 to 1/128 display duty cycle * Input/outputs for cascade conection * Bias supply voltages can be supplied externally * Operating supply voltage and ambient temperature: 2.7 to 5.5V logic supply (VDD) at Ta = -20 to +85C 8 to 20V LCD supply (VDD-VEE) at Ta = -20 to +85C * CMOS process * package: QIP80D
Any and all SANYO Semiconductor 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 Semiconductor representative nearest you before usingany SANYO Semiconductor products described or contained herein in such applications. SANYO Semiconductor 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 Semiconductor products described or contained herein.
N2206HKIM B8-8531 No.A0575-1/8
LC7942KD
Package Dimensions
unit: mm (typ) 3177
23.2 20.0
1.0
1.6 0.15 41 40
0.8 64 65
0.8
0.35
17.2
14.0
0.8
1.6
80 1 24
25
2.45max 0.8
2.15 21.6 0.8
SANYO : QIP80D(14X20)
Pin Assignment
O24 O23 O22 O21 O20 O19 O18 O17 O16 O15 O14 O13 O12 O11 O10 O9 O8 O7 O6 O5 O4 O3 O2 O1 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 O25 O26 O27 O28 O29 O30 O31 O32 O33 O34 O35 O36 O37 O38 O39 O40 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 1 DIO1 NC CP NC M NC VSS RS/LS VDD DISPOFF V1 V2 V5 VEE NC DIO64
LC7942KD
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 O48 O49 O50 O51 O52 O53 O54 O55 O56 O57 O58 O63 O64 O59 O60 O61 O62
O41 O42 O43 O44 O45 O46 O47
15.6
Top view
No.A0575-2/8
LC7942KD
Block Diagram
O1 O2 O3 ------------------ O63 O64
V1 VDD V2 V5 VEE 4 Level LCD Drive Circuit (64 bits)
VSS
Level Shifter (64bits)
M DISPOFF
DIO1
I/O
Bidirectional Shift Register (64 bits)
I/O
DIO64
RS/LS CP
No.A0575-3/8
LC7942KD
Pin Function
Pin No. 32 34 27 30 29 28 38 40 25 33 Pin name VDD VSS VEE V1 V2 V5 CP DIO1 DIO64 RS/LS I I/O I/O I RS/LS L (right shift) H (left shift) 36 31 41 to 80 1 to 24 M DISPOFF O1 to O40 O41 to O64 I I Output Data Transfer Direction O1O64 O64O1 DIO1 IN OUT DIO64 OUT IN Supply LCD panel drive voltage supplies. V1 and VEE are selected levels. V2 and V5 are non-selected levels. Display data input clock (falling-edge trigger). Input/Output Supply VDD-VSS is the logic supply. VDD-VEE is the LCD supply. Functions
LCD panel drive voltage alternating control signal. O1 to O64 output control input pins. LCD drive outputs The output drive level is determined by the display data, M signal and DISPOFF input as shown below. M L L H H * Data L H L H * DISPOFF H H H H L Output V2 VEE V5 V1 V1
* Don't care (To be set to either "H" or "L") 26 35 37 39 NC No connection
No.A0575-4/8
LC7942KD
Specifications
Absolute Maximum Ratings at Ta=252C, VSS = 0V
Parameter Maximum supply voltage (logic) Maximum supply voltage (LCD) Maximum input voltage Operating temperature range Storage temperature range Symbol VDD max VDD-VEE max VIN max Topr Tstg *1 Conditions Ratings -0.3 to +7.0 0 to 22 -0.3 to VDD +0.3 -20 to +85 -40 to +125 Unit V V V C C
Note *1 The voltages V1, V2, and V5 must obey the relationships: VDDV1>V2>V5>VEE, VDD-V27V, V5-VEE7V Allowable Operating Ranges at Ta = -20 to 85C, VSS = 0V
Parameter Supply voltage (logic) Supply voltage (LCD) Input high level voltage Input low level voltage CP (Shift clock) CP (pulse width) Setup time Hold time CP rise time CP fall time Symbol VDD VDD-VEE VIH VIL fCP tWC tSETUP tHOLD tR tF *2, 3 DIO1, DIO64, CP, M, RS/LS, DISPOFF DIO1, DIO64, CP, M, RS/LS, DISPOFF CP CP DIO1CP, DIO64CP DIO1CP, DIO64CP CP CP Conditions min 2.7 8 0.8VDD 125 100 100 Ratings typ 50 50 0.2VDD 1 max 5.5 20 V V V V MHz ns ns ns ns ns Unit
Note *2 The voltages V1, V2, and V5 must obey the relationships: VDDV1>V2>V5>VEE, VDD-V27V, V5-VEE7V *3 When applying power, apply power to the LCD drive block after applying power to the logic block or apply power to both the blocks simultaneously. When turning off power, turn off power to the logic block after turning off power to the LCD drive block or turn off power to both the blocks simultaneously.
No.A0575-5/8
LC7942KD
Electrical Characteristics at Ta = 252C, VSS = 0V, VDD= 2.7 to 5.5V
Parameter Input high level current Input low level current Output high level voltage Output low level voltage Driver on resistance VDD static Current Symbol IIH IIL VOH VOL RON IDD Conditions min VIN = VDD, VDD = 5.5V, DIO1, DIO64, CP, M, RS/LS, DISPOFF VIN = VSS, VDD = 5.5V, DIO1, DIO64, CP, M, RS/LS, DISPOFF IOH = -0.4mA, DIO1, DIO64 IOL = 0.4mA, DIO1, DIO64 VDD-VEE = 18V. |VDE-VO| = 0.25V VDD = 4.5V *4; O1 to O64 VDD-VEE = 18V, CP = VDD -1 VDD-0.4 Ratings typ 0.4 1.5 100 max 1 A A V V k A Unit
Note *4 VDE = V1 or V2 or V5 or VEE, V1 = VDD, V2 = 10/11(VDD-VEE), V5 = 1/11(VDD-VEE) Switching Characteristics at Ta = 252C, VSS = 0V, VDD = 2.7 to 5.5V
Parameter Output delay time Symbol tPLH tPHL Conditions min CL=30pF; CPDIO1, CPDIO64 CL=30pF; CPDIO1, CPDIO64 Ratings typ max 250 250 ns ns Unit
Switching Characteristics Diagram
tR twc tF 0.8VDD CP 0.2VDD
tSETUP DIO1 (DIO64)
tHOLD
tPLH , tPHL
DIO64 (DIO1)
No.A0575-6/8
Controller
FLM
M M LC7942KD CP #1 O64 DIO64 V1 V2 V5 VEE 100 LCD Panel (240x100 Pixels) 4
DIO1
O1
Application Notes LCD Panel
LOAD
CP
Serial Data
VDD 240 239 161 160 159
****
DIO1 O1 M LC7942KD
**** **** ****
LC7942KD
V1
CP #2 O36
2
1
80
79
81
V2 CDI LC7940KD-#3 4 M 4 V1 V3 V4 VEE 4 V1 V3 V4 VEE 6
+
V1 V2 V5 VEE
****
CDI CDO LC7940KD-#2 CDO LC7940KD-#1
R
+
V3
7R
+
V4
M
V1 V3 V4 VEE
M
R
V5
+
R
VEE
LOAD CP Serial Data
****
R
CDI
V1 V3 V4 VEE
LOAD CP SDI
No.A0575-7/8
LC7942KD
Specifications of any and all SANYO Semiconductor 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 Semiconductor 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 Semiconductor 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 Semiconductor 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 Semiconductor 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 Semiconductor 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 November, 2006. Specifications and information herein are subject to change without notice.
PS No.A0575-8/8

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