SANYO LC7574NW, LC7574NE Datasheet

Ordering number : EN3586A

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

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

CMOS LSI

O2095HA (OT)/4032JN No. 3586-1/10

Overview

The LC7574NE and LC7574NW are 1/2 duty VFD
drivers that can be used for electronic tuning frequency
display and other applications under the control of a
controller. These products can directly drive VFDs with
up to 74 segments.

Features

• 74 segment outputs

• Noise reduction circuits are built into the output drivers.

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

• Switching between digital and analog dimmers under
serial data control

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

• All segments can be turned off with the BLK pin

Package Dimensions

unit: mm

3156-QFP48E

SANYO: QFP48E

[LC7574NE]

unit: mm

3163A-SQFP48

SANYO: SQFP48

[LC7574NW]

• 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.

1/2 Duty VFD Driver for Frequency Display

LC7574NE, 7574NW

Specifications

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

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

Electrical Characteristics in the Allowable Operating Ranges

No. 3586-2/10

LC7574NE, 7574NW

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage

V

DD

max V

DD

–0.3 to +6.5 V

V

FL

max V

FL

–0.3 to +21.0 V

Input voltage

V

IN

1 DI, CL, CE, BLK, DIM –0.3 to +6.5 V

V

IN

2 OSC –0.3 to VDD+ 0.3 V

Output voltage

V

OUT

1 S1 to S37, G1, G2 –0.3 to VFL+ 0.3 V

V

OUT

2 OSC –0.3 to VDD+ 0.3 V

Output current

I

OUT

1 S1 to S37 5 mA

I

OUT

2 G1, G2 67 mA

Allowable power dissipation Pd max

Ta = 85°C (LC7574NE) 250 mW

Ta = 85°C (LC7574NW) 150 mW
Operating temperature Topr –40 to +85 °C
Storage temperature Tstg –50 to +125 °C

Parameter Symbol Conditions min typ max Unit

Supply voltage

V

DD

V

DD

4.5 5.0 5.5 V

V

FL

V

FL

8 12 18 V

Input high level voltage V

IH

DI, CL, CE, BLK 0.8 V

DD

5.5 V

Input low level voltage V

IL

DI, CL, CE, BLK 0 0.2 V

DD

V

Guaranteed oscillator range f

OSC

OSC 0.4 1.6 3.0 MHz

Recommended external

R

OSC

OSC 12 kΩ

resistance
Recommended external

C

OSC

OSC 50 pF

capacitance
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

Input voltage range V

IN

DIM 0 +5.5 V

Parameter Symbol Conditions min typ max Unit

Input high level current I

IH

DI, CL, CE, BLK, DIM: VI= 5.5 V 5 µA

Input low level current I

IL

DI, CL, CE, BLK, DIM: VI= 0 V –5 µA

V

OH

1 S1 to S37: IO= 2 mA VFL– 0.6 V

Output high level voltage V

OH

2 G1, G2: IO= 25 mA VFL– 0.6 V

V

OH

3 G1, G2: IO= 50 mA VFL– 1.3 V

Output low level voltage V

OL

S1 to S37, G1, G2: IO= –5 µA, Ta = 25°C 0.125 0.25 0.5 V

Oscillator frequency f

OSC

R

OSC

= 12 kΩ, C

OSC

= 50 pF 1.6 MHz

Hysteresis voltage V

H

DI, CL, CE, BLK 0.5 V
A/D converter linearity error Err DIM –1/2 +1/2 LSB
Current drain I

DD

Outputs open: f

OSC

= 1.6 MHz 10 mA

Pin Assignment

1. When CL is stopped at the low level

2. When CL is stopped at the high level

Figure 1

No. 3586-3/10

LC7574NE, 7574NW