Sanyo LC7941YC Specifications

Ordering number: EN 6157

Overview

The LC7940YC and LC7941YC are segment driver ICs for driving large, dot–matrix LCD displays. They read 4 bit parallel or serial input, display data from a controller into an 80–bit latch, and then generate LCD drive signals corresponding to that data.

The LC7940YC and LC7941YC feature mirror–image pin assignments, allowing them to be used together to increase component density. They are designed to be used with the LC7942YC common driver to drive large LCD panels.

CMOS IC

LC7940YC,7941YC

Dot-matrix LCD Drivers

–

Features

• 80 built–in LCD display drive circuits

• 1/8 to l/128 display duty cycle

• Serial or 4–bit parallel data input

• Chip disable for low power dissipation for large–sized panels

• Bias supply voltags can be supplied externally

• Operating supply voltage and ambient temperature

- 2.7 to 5.5 V logic supply ( VDD) at Ta = –20 to +85°C

- 8 to 20V LCD supply (V

–

VEE ) at Ta = –20 to

DD

+85 °C

• CMOS process

Speciﬁcations

The following electrical characteristics apply when sealed in a Sanyo standard QIC-100 package.

Absolute Maximum Ratings at Ta = 25 ± 2°C, V

Parameter Symbol Ratings Unit

Logic supply voltge VDD max –0.3 to +7.0 LCD supply voltage, See Note below. VDD – VEE max 0 to 22 Input voltage VI max –0.3 to VDD + 03

SS

= 0 V

V V

°C

■ 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

63099RM (ID) No. 6157—1/13

Parameter Symbol Ratings Unit

Operating temperature range Storage temperature range

Note

V

≥ V1 > V3 > V4 > V

DD

EE

LC7940YC, LC7941YC

T

opr

T

stg

–20 to +85

–40 to +125

°C °C

Recommended Operating Condltions at Ta =

Parameter Symbol Conditions

Logic supply voltage V LCD supply voltage VDD – V

HIGH–level input voltage V

LOW–level inpvt voltage V

CP shift clock frequency f CP pulsewidth t LOAD pulsewidth t DIn and SDI to CP setup time t DIn and SDI to CP hold time t

CP to LOAD time

LOAD to CP time t CP rise time t CP fall time t LOAD rise time t LOAD fall time t

DD

IH

IL

CP WC WL

SETUP

HOLD

t

CL1

t

CL2

LC

R

F RL FL

EE

See Notes 1 and 2. 8 – 20 CP, CDl, DI1 to DI3, M,

SDl, P/S, DISPOFF and LOAD

CP, CDI, Dl1 to DI3, M, SDl, P/S,DISPOFF and LOAD

–

20 to + 85°C, V

= 0V

SS

Ratings

min typ max

2.7 – 5.5

Unit

V V

0.8V

DD

– – 0.2V

100–– 100––

80–– 80––

0–– 100–– 100––

––50

––

DD

–3.3

V

MHz

ns ns ns ns ns ns ns ns ns ns ns

Notes

1. V

≥ Vl > V3 > V4 > V

DD

EE

2. At turn ON, the LCD supply should be energized after or simultaneously with the logic supply. At turn OFF, the logic supply should be cut after or simultaneously with the LCD supply.

Electrlcai Characterfstlcs at Ta = 25 ± 2°C,V

Parameter Symbol Conditions

HIGH–level input current I

LOW–level input current I

CDO HIGH–level output voltage V CDO LOW–levef output voltage V

O1 to O80 driver ON resistance RON

IH

IL

OH

OL

= 0V, VDD = 2.7 to 5.5 V

SS

Ratings

min typ max

VIN =VDD; LOAD, CP, CDI, P/S, DI1 to DI3, SDl, M,

––1

and DISPOFF VIN = VSS; LOAD, CP,

CDl, P/S, DI1 to DI3, SDI,

–––1

M, and DISPOFF IOH = –400 µA VDD – 0.4 – – IOL = 400 µA – – 0.4 VDD – VEE = 18 V,

|VDE – VO|= 0.25 V.

–24

See note

Unit

µA

V V

kΩ

No. 6157—2/13

LC7940YC, LC7941YC

Parameter Symbol Conditions

CDI = VDD,

VDD to VSS standby supply current I

ST

VDD – VEE = 18 V, fCP = 3.3 MHz, no output load ; V

SS

VDD – VEE = 18 V,

VDD to Vss operating supply current I

SS

fCP = 3.3 MHz, I

= 5.156 kHz,

LOAD

fM = 52 Hz ;VSS VDD – VEE = 18V,

VDD to VEE operating supply current I

CP input capacitance C

EE

I

fCP = 3.3 MHz, f

= 5,156 kHz,

LOAD

= 52 Hz ; V

f

M

EE

fCP = 3.3 MHz ; CP – 5 –

Note

V

= V1 or V3, or V4 or VEE, V1 = VDD, V3 = 9/11 × (VDD – VEE), V4 = 2/11 × (VDD – VEE)

DE

Switching Characteristics at Ta = 25 ± 2°C,V

Parameter Symbol Conditions

CDO output delay time t

D

= 0V, VDD = 2.7 to 5.5 V

SS

CL = 30 pF – – 200

Ratings

min typ max

– – 200

––1.0

––0.1

Ratings

min typ max

Unit

µA

mA

pF

Unit

ns

Switching Characteristics Waveform

t

CP

SDI DI1 to 3

LOAD

CDO

WC

R

t

CL (1)

SET

UP

t

RL

WC

F

t

HOLD

t

CL (2)

t

WL

t

D

t

FL

0.8V

DD

0.2VDD

t

LC

t

D

No. 6157—3/13

Pad Layout (Top view)

O1 O2 O3 O4 O5 O6 O7 O8

O9 O10 O11 O12 O13 O14 O15 O16 O17 O18 O19 O20 O21 O22 O23 O24 O25 O26 O27 O28 O29 O30

CP

O31

CDI

O32

LOAD

O33

LC7940YC, LC7941YC

SDI

DI3

DI2

DI1

M

V1

LC7940YC

O34

O35

O36

O37

O38

O39

O40

VDDV3V4

O41

O42

O43

O44

VEE

O45

VSS

O46

O47

P/S

DISPOFF

O48

O49

CDO

O50

O80 O79 O78 O77 O76 O75 O74 O73 O72 O71 O70 O69 O68 O67 O66 O65 O64 O63 O62 O61 O60 O59 O58 O57 O56 O55 O54 O53 O52 O51

CDO

DISPOFF

O50

O49

P/S

O48

O47

VSS

VEEV4V3

O46

O45

VDD

LC7941YC

O44

O43

O42

O41

V1

O40

O39

M

O38

DI1

O37

DI2

O36

DI3

O35

SDI

O34

LOAD

O33

CDI

O32

CP

O31

O1 O2 O3 O4 O5 O6 O7 O8 O9 O10 O11 O12 O13 O14 O15 O16 O17 O18 O19 O20 O21 O22 O23 O24 O25 O26 O27 O28 O29 O30

No. 6157—4/13