# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

ROHM BU9795AKV Data Sheet

Summary

Streamline your embedded display design with this advanced series of ultra-low power LCD segment drivers. Engineered to simplify complex circuit requirements, these integrated solutions feature built-in RAM, reliable oscillation circuits, and customizable serial interfaces (2/3-wire). Suitable for a vast range of applications—including portable POS systems, medical devices, digital cameras, and home appliances—they provide dependable, low-power performance ideal for professionals developing user-facing electronic equipment.

📄 Preview PAGE OF 16

Page 1 Text Content

LCD Segment Drivers

Standard Segment Drivers BU9795AKV/FV/GUW,BU9794AKV,BU97950FUV/KS2 No.11044EBT06

●Description ROHM standard function segment driver series achieve “Ultra-Low power consumption”. Also these drivers need not external components. And this driver series is very simple that only has segment driver function. So, these driver series are very suitable to add in LCD display function for various applications.

●Features (BU9795AKV/FV/GUW, BU9794AKV) 1) 3wire serial interface 2) Integrated RAM for display data (DDRAM) 3) Power supply circuit for LCD driving 1/2, 1/3Bias selectable 1/4Duty Integrated Buffer AMP 4) Integrated Oscillation circuit 5) Integrated Power-on Reset circuit 6) No external components 7) Support blink function 8) Support standby mode 9) Low voltage / Ultra low power consumption design 10) Support unity voltage supply (BU9795AKV/FV/GUW) 11) Support Independent power supply circuit for LCD driving (BU9794AKV)

●Features (BU97950FUV/KS2) 1) 2wire serial interface 2) Integrated RAM for display data (DDRAM) 3) Integrated Power supply circuit for LCD driving 1/4 Bias 1/8 Duty Integrated Buffer AMP 4) Integrated Oscillation circuit 5) Integrated Power-on Reset circuit 6) No external components 7) Support standby mode 8) Low voltage / Ultra low power consumption design 9) Integrated Electrical volume register (EVR) function 10) Support Register Read function 11) Support Independent power supply circuit for LCD driving

●Applications Telephone, FAX, Portable equipment (POS, ECR, PDA etc.), DSC, Digital video camera, Home electrical appliance, Meter equipment, Healthcare equipment etc.

www.rohm.com 2011.11 - Rev.B

© 2011 ROHM Co., Ltd. All rights reserved.

Page Summary Contents For ROHM BU9795AKV Data Sheet

Page 1 LCD Segment Drivers Standard Segment Drivers BU9795AKV/FV/GUW,BU9794AKV,BU97950FUV/KS2 No.11044EBT06 ●Description ROHM standard function segment driver series achieve “Ultra-Low power consumption”. Al...
Page 2 BU9795AKV/FV/GUW,BU9794AKV,BU97950FUV/KS2 Technical Note ●Line up matrix BU9795A BU97950 Parameter BU9794AKV KV FV GUW FUV KS2 Segment output 35 27 31 50 35 35 Common output 4 4 4 4 8 8 Total display ...
Page 3 BU9795AKV/FV/GUW,BU9794AKV,BU97950FUV/KS2 Technical Note ●Electrical characteristics <BU9795AKV/FV/GUW> DC Characteristics (VDD=2.5~5.5V, VSS=0V, Ta=-40~85C, unless otherwise specified) Limits ...
Page 4 BU9795AKV/FV/GUW,BU9794AKV,BU97950FUV/KS2 Technical Note <BU9794AKV> DC Characteristics (VDD=2.5~5.5V, VLCD=2.5~5.5V, VSS=0V, Ta=-40~85C, unless otherwise specified) Limits Parameter Symbol Uni...
Page 5 BU9795AKV/FV/GUW,BU9794AKV,BU97950FUV/KS2 Technical Note <BU97950FUV/KS2> DC Characteristics (VDD=2.5~5.5V, VLCD=2.5~5.5V, VSS=0V, Ta=-40~85 ºC, unless otherwise specified) Limits Parameter Symb...
Page 6 BU9795AKV/FV/GUW,BU9794AKV,BU97950FUV/KS2 Technical Note ●Block Diagram / Pin Arrangement / Terminal Description <BU9795AKV> ●Block Diagram ●Pin Arrangement COM0……COM3 SEG0……SEG34 LCD voltage ge...
Page 7 BU9795AKV/FV/GUW,BU9794AKV,BU97950FUV/KS2 Technical Note <BU9795AFV> ●Block Diagram ●Pin Arrangement COM0……COM3 SEG4……SEG30 LCD voltage generator common Segment driver driver LCD BIAS SELECTOR c...
Page 8 BU9795AKV/FV/GUW,BU9794AKV,BU97950FUV/KS2 Technical Note <BU9795AGUW> ●Block Diagram ●Pin Arrangement COM0……COM3 SEG2……SEG32 LCD voltage generator common Segment (NC) SEG13 SEG15 SEG18 SEG20 SEG...
Page 9 BU9795AKV/FV/GUW,BU9794AKV,BU97950FUV/KS2 Technical Note <BU9794AKV> ●Block Diagram ●Pin Arrangement COM0……COM3 SEG0……SEG49 LCD voltage generator common Segment driver driver SEG38 SEG21 SEG39 S...
Page 10 BU9795AKV/FV/GUW,BU9794AKV,BU97950FUV/KS2 Technical Note <BU97950FUV> ●Block Diagram ●Pin Arrangement COM0……COM7 SEG0……SEG34 LCD voltage generator common Segment driver driver LCD BIAS SELECTOR ...
Page 11 BU9795AKV/FV/GUW,BU9794AKV,BU97950FUV/KS2 Technical Note <BU97950KS2> ●Block Diagram ●Pin Arrangement COM0……COM7 SEG0……SEG34 LCD voltage generator common Segment driver driver SEG5 SEG18 SEG4 SE...
Page 12 BU9795AKV/FV/GUW,BU9794AKV,BU97950FUV/KS2 Technical Note ●IO Equivalent Circuit <BU9795AKV/FV/GUW> VDD VDD VLCD OSCIN SD, SCL CSB, INHb, TEST VSS SEG/COM Fig.16 I/O equivalent circuit (BU9795AKV...
Page 13 BU9795AKV/FV/GUW,BU9794AKV,BU97950FUV/KS2 Technical Note <BU97950FUV> VDD VLCD VSS VSS SCLSDA VSS VSS SEG/COM Fig.18 I/O equivalent circuit (BU97950FUV/KS2) www.rohm.com 2011.11 - Rev.B © 2011 R...
Page 14 BU9795AKV/FV/GUW,BU9794AKV,BU97950FUV/KS2 Technical Note ●Ordering part number Part No. Part No. Package Packaging and forming specification BU9794A FV : SSOP-B40 E2: Embossed tape and reel BU9795A GU...
Page 15 BU9795AKV/FV/GUW,BU9794AKV,BU97950FUV/KS2 Technical Note VQFP48C 1. 6M 9.0±0.2 <Tape and Reel information> 7. ±0 .1 ±0 .1 .0 ±0 .2 ±0 .0 Embossed carrier tape Tape Quantity 1500pcs Direction of ...
Page 16 Notice No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without not...

Manual Details

Brand ROHM
Pages 16
File Size 411.26 KB
Published May 31, 2026
69 views

Enter the captcha to get the download link:

captcha

Frequently Asked Questions

Are external components required to use these segment drivers?

No, the driver series is designed with integrated functions and does not require external components.

What types of serial interfaces are available in this product line?

The models support both a 3wire and a 2wire serial interface depending on the specified variant.

Can these drivers be used in life-critical systems like medical equipment?

No, they are not designed for equipment requiring an extremely high level of reliability (e.g., medical or transportation machinery).

What is the recommended operating temperature range?

The recommended operating temperature range for these products is -40 to +85 °C.