SANYO LC75725E Datasheet

Overview

The LC75725E is a 1/4 to 1/11 duty dynamic drive VFD
driver. It provides 43 segment outputs and 11 digit
outputs. It facilitates the construction of display systems
operating under the control of a controller.

Features

• Dynamic drive display technique to display four to
eleven digits on the VFD.

• Serial data input supports CCB* format communication
with the system controller.

• The dimmer level is controlled by serial data input.
(The dimmer has a resolution of 10 bits.)

• High generality since display data is displayed without
the intervention of a decoder.

• All segments can be turned off with the BLK pin.

• CR oscillator circuit.

Package Dimensions

unit: mm

3159-QFP64E

CMOS LSI

Ordering number : EN5606

3398HA (OT) No. 5606-1/13

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

1/4 to 1/11 Duty Dynamic Drive VFD Driver

LC75725E

SANYO: QIP64E

[LC75725E]

• 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.

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage

V

DD

max V

DD

–0.3 to +6.5

V

V

FL

max V

FL

VDD– 47 to VDD+0.3

Input voltage

V

IN

1 DI, CL, CE, BLK –0.3 to +6.5

V

V

IN

2 OSCI –0.3 to V

DD

+0.3

Output voltage

V

OUT

1 S1 to S43, G1 to G11 V

DD

– 47 to VDD+0.3

V

V

OUT

2 OSCO –0.3 to V

DD

+0.3

Output current

I

OUT

1 S1 to S43 10

mA

I

OUT

2 G1 to G11 30

Allowable power dissipation Pd max Ta = 85°C 300 mW
Operating temperature Topr –40 to +85 °C
Storage temperature Tstg –50 to +150 °C

Specifications

Absolute Maximum Ratings at Ta = 25°C, VSS= 0 V

No. 5606-2/13

LC75725E

Parameter Symbol Conditions

Ratings

Unit

min typ max

Supply voltage

V

DDVDD

4.5 5.0 5.5
V

V

FL

V

FL

VDD– 45 V

DD

Input high-level voltage

V

IH

1 DI, CL, CE, BLK 0.8 V

DD

5.5
V

V

IH

2 OSCI 0.8 V

DD

V

DD

Input low-level voltage V

IL

DI, CL, CE, BLK, OSCI 0 0.2 V

DD

V

Guaranteed oscillator range f

OSC

OSCI, OSCO 1.8 3.7 4.9 MHz

Recommended external resistance R

OSC

OSCI, OSCO 1.0 5.6 22 KΩ

Recommended external capacitance C

OSC

OSCI, OSCO 10 22 47 pF

Low level clock pulse width t

øL

CL Figure 1 0.5 µs

High level clock pulse width t

øH

CL Figure 1 0.5 µs

Data setup time t

ds

DI, CL Figure 1 0.5 µs

Data hold time t

dh

DI, CL Figure 1 0.5 µs

CE wait time t

cp

CE, CL Figure 1 0.5 µs

CE setup time t

cs

CE, CL Figure 1 0.5 µs

CE hold time t

ch

CE, CL Figure 1 0.5 µs

BLK switching time t

c

BLK, CE Figure 3 10 µs

Allowable Operating Ranges at Ta = –40 to +85°C, VDD= 4.5 to 5.5 V, VSS= 0 V

Parameter Symbol Conditions

Ratings

Unit

min typ max

Input high-level current

I

IH

1 DI, CL, CE, BLK:V

I

= 5.5 V 5

µA

I

IH

2 OSCI:V

I

= V

DD

5

Input low-level current I

IL

DI, CL, CE, BLK: VI= 0 V –5 µA

V

OH

1 S1 to S43: I

O

= 5 mA VDD– 2.0

Output high-level voltage V

OH

2 G1 to G11: I

O

= 20 mA VDD– 2.0 V

V

OH

3 OSCO: I

O

= 0.5 mA VDD– 2.0

Output low-level voltage V

OL

OSCO: IO= –0.5 mA 2.0 V

Output off voltage V

OFF

S1 to S43, G1 to G11: VFL= VDD– 45 V,

V

DD

– 44 V

Outputs off

Pull-down resistors R

PD

S1 to S43, G1 to G11: VFL= VDD– 45 V,

50 100 200 kΩ

V

O

= V

DD

Oscillator frequency f

OSC

OSCI, OSCO: R

OSC

= 5.6 kΩ, C

OSC

= 22 pF 3.7 MHz

Hysteresis voltage V

H

DI, CL, CE, BLK 0.1 V

DD

V

Current drain I

DD

VDD: Outputs open. Display off,

5 mA

f

OSC

= 3.7 MHz, VFL= VDD– 45 V

Electrical Characteristics in the Allowable Operating Ranges

No. 5606-3/13

LC75725E

1. When CL is stopped at the low level

2. When CL is stopped at the high level

Pin Assignment

Figure 1

Top view

Block Diagram

No. 5606-4/13

LC75725E

Pin Functions

Pin Pin No. Function I/O Handling when unused

V

FL

1, 13 Driver block power supply connection. (Both pins must be connected.) — —

V

DD

60 Logic block power supply connection. Provide a voltage between 4.5 and 5.5 V. — —

V

SS

57 Power supply connection. Connect to the ground. — —

OSCI 59

Oscillator connection. An oscillator circuit is formed by connecting an external resistor

I GND

OSCO 58

and capacitor to these pins.

O OPEN

Display off control input.

BLK 61

BLK = Low (V

SS

) ... Display off. (S1 to S43 and G1 to G11 at VFLlevel.)

I GND

BLK = High (V

DD

) ... Display on.

Note that serial data can be transferred while the display is turned off.

CL 63

DI 64 I GND

CE 62

G1 to G11 2 to 12 Digit outputs. These pins are P-channel open drain outputs with pull-down resistors. O OPEN

S1 to S43 56 to 14

Segment outputs for displaying the display data transferred by serial data input. These pins

O OPEN

are P-channel open drain outputs with pull-down resistors.

Serial data transfer inputs. These pins must be connected to the system microcontroller.
CL: Synchronization clock
DI: Transfer data
CE: Chip enable