TECHNICAL NOTE
LCD Segment Driver series
For 72/80/96 Segment type LCD
LCD Segment Driver
BU9735K, BU9796FS, BU9716BKV, BU9718KV
● Outline
This is LCD segment driver for 72-96 segment type display. There is a lineup which is suitable for multi
function display and is integrated display RAM and power supply circuit for LCD driving with 4 common
output type: BU9735K and BU9796FS. And 3 common output type: BU9716BKV and BU9718KV.
○ 72Segment (18SEG×4COM) Driver BU9735K
○ 80Segment (20SEG×4COM) Driver BU9796FS
○ 96Segment (32SEG×3COM) Driver BU9716BKV/BU9718KV
BU9735K
・・・・・・・P.1
・・・・・・・P.9
・・・・・・・P.19
72Segment (18SEG×4COM) Driver
● Feature
______________
__________
1) 4wire serial interface (SCK, SD, C / D, CS)
2) Integrated RAM for display data (DDRAM) ： 18 × 4bit (Max 72 Segment)
3) LCD driving port： 4 Common output, 18 Segment output
4) Display duty： 1/4 duty
5) Integrated Oscillator circuit (external resister type)
6) Integrated Power supply circuit for LCD driving (1/3 bias)
7) Low power/ Ultra low power consumption design： +2.5～5.5V
● Uses
DVC, Car audio, Telephone
● Absolute Maximum Ratings （Ta=25degree, VSS=0V） (BU9735K)
Symbol
Limits
Unit
Power Supply Voltage1
Parameter
VDD
-0.3 ～ +7.0
V
Power supply
Power Supply Voltage2
VLCD
-0.3 ～ +7.0
V
LCD drive voltage
Pd
400
mW
Allowable loss
Operational temperature range
Topr
-40 ～ +85
Tstg
-55 ～ +125
Degree
VIN
-0.3 to VDD*0.3
V
VOUT
-0.3 to VDD+0.3
When use more than Ta=25C, subtract
4mW per degree.
Degree
Storage temperature range
Remarks
V
Input voltage range
Output voltage range
*This product is not designed against radioactive ray.
● Recommend operating conditions (Ta=25degree, VSS=0V) (BU9735K)
Parameter
Symbol
MIN
TYP
MAX
Unit
Remarks
Power Supply Voltage1
VDD
2.2
5.5
V
Power Supply Voltage2
VLCD
2.5
5.5
V
VLCD≧VC≧VSS
Oscillator frequency
fOSC
36
KHz
Rf=470kΩ
This document is not delivery specifications.
Jun. 2008
