BU97931FV-LB Datasheet, PDF (1/32 Pages) Rohm – Multifunction LCD Segment Driver

Datasheet
MAX 112 segments (SEG28×COM4)
Multifunction LCD Segment Driver
BU97931FV-LB
This is the product guarantees long time support in Industrial
market.
Features
„ Long Time Support Product for Industrial Equipment
„ Integrated RAM for display data (DDRAM):
28 x 4 bit (Max 112 Segment)
„ LCD Drive Output:
4 Common Output, Max 28 Segment Output
„ Integrated 1ch LED Driver Circuit
„ Segment/GPO (Max 5port) Output Mode Selectable
„ Support PWM Generation from ext. or Internal Clock
(Resolution: 8bit)
„ Support Standby Mode
„ Integrated Power-on-Reset Circuit (POR)
„ Integrated Oscillator Circuit
„ No External Component
„ Low Power Consumption Design
„ Independent Power Supply for LCD Driving
„ Support Blink Function
(Blink frequency 1.6, 2.0, 2.6, 4.0Hz selectable)
Key Specifications
■ Supply Voltage Range:
+1.8V to +3.6V
■ LCD Drive Power Supply Range: +2.7V to +5.5V
■ Operating Temperature Range: -40°C to +85°C
■ Max Segments:
112 Segments
■ Display Duty:
Static, 1/3, 1/4 Selectable
■ Bias:
Static, 1/3
■ Interface:
3Wire Serial Interface
Package
W (Typ) x D (Typ) x H (Max)
Applications
„ Industrial Equipment
„ Telephone
„ FAX
„ Portable Equipment (POS, ECR, PDA etc.)
„ DSC
„ DVC
„ Car audio
„ Home Electrical Appliance
„ Meter Equipment
Etc.
Typical Application Circuit
SSOP-B40
13.60mm x 7.80mm x 2.00mm
VLED=5.0V
LED/GPO using case
.0 V
3.3V
VLCD
LED
VDD
BU97931 FV-LB
Regarding resistor value
Please detect the value according to
input current value (current MAX = 20mA)
SEG27(GPO0) to
SEG23(GPO4)
Other
device
VSS
CSB SD SCL CLKIN
SEG0 toSEG22
COM0 ^to COM3
LCD
Input signal from controller
CLKIN
External CLK input terminal
In case being unused, connect to VSS or be opened.
Figure 1. Typical application circuit
○Product structure：Silicon monolithic integrated circuit
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111ï½¥14ï½¥001
○This product has no designed protection against radioactive rays.
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TSZ02201-0P4P0D300490-1-2
26.Feb.2014 Rev.002