Datasheet LCD Segment Drivers Multi-function Segment Drivers BU97540KV-M MAX335 Segment(67segx5COM) General Description Key Specifications The BU97540KV-M is 1/5, 1/4, 1/3duty or Static + +2.7V to +6.0V Supply Voltage Range: General-purpose LCD driver. The BU97540KV-M -40C to +85C Operating Temperature Range: can drive up to 335 LCD Segments. The 335 Segments Max Segments: BU97540KV-M can also control up to 9 Static,1/3,1/4,1/5 Selectable Display Duty: General-purpose/PWM output pins. 1/2,1/3,1/4 Selectable Bias: These products also incorporate a key scan circuit 3Wire Serial Interface Interface: that accepts input from up to 30 keys to reduce printed circuit board wiring. Packages Features VQFP80 W(Typ) D(Typ) H(Max) (Note) AEC-Q100 Qualified Key input function for up to 30 keys (A key scan is performed only when a key is pressed.) Supports 1 chip(Master) mode and 2 chip(Master + Slave) mode Either 1/5, 1/4, 1/3 or Static can be selected with the serial control data. 1 chip mode(only Master): 1/5 duty drive: Up to 335 segments can be driven 1/4 duty drive: Up to 272 segments can be driven 1/3 duty drive: Up to 204 segments can be driven Static drive: Up to 68 segments can be driven VQFP80 2 chip mode(Master + Slave): 14.00mm x 14.00mm x 1.60mm 1/5 duty drive: Up to 680 segments can be driven 1/4 duty drive: Up to 548 segments can be driven 1/3 duty drive: Up to 411 segments can be driven Static drive: Up to 137 segments can be driven Serial data control of frame frequency for common and segment output waveforms. Serial data control of switching between the segment output pin, PWM output pin and General-purpose output pin functions.(Max 9 pins) Built-in OSC circuit Integrated Voltage Detected Type Power on Reset (VDET) circuit No external component Low power consumption design Supports Line and Frame Inversion (Note) Grade 3 Applications Car audio, Home electrical appliance, Meter equipment etc. Product structureSilicon monolithic integrated circuit This product has no designed protection against radioactive rays .w ww.rohm.com TSZ02201-0P4P0D300970-1-2 2015 ROHM Co., Ltd. All rights reserved. 1/67 TSZ22111 14 001 18.Jul.2019 Rev.004 BU97540KV-M Typical Application Circuit Key Matrix P1/G1 (General Purpose/PWM Ports) (For control of backlight) P9/G9 KS1 / S53 KI1 / S59 COM1/S71 COM2/S70 KS6 / S58 KI5 / S63 COM3/S69 COM4/S68 COM5/S67 +5V VDD *1 S1/P1/G1 (Note) LCD Panel (Up to 335 Segments) S9/P9/G9 S10 SCE From Control S52 SCL SDI S64 S65 To Control SDO S72 +5V S66/TESTIN OSC IN/S73 1Chip Mode(Master) P1/G1 (General Purpose/PWM Ports) (For control of backlight) P9/G9 Key Matrix P1/G1 (General Purpose/PWM Ports) (For control of backlight) P9/G9 KS1 / S53 KI1 / S59 COM1/S71 COM2/S70 KS6 / S58 KI5 / S63 COM3/S69 COM4/S68 COM5/S67 VDD +5V *1 S1/P1/G1 (Note) MS MASTER S9/P9/G9 S10 SCE From Control S52 SCL SDI SYNCIO/S64 CLKIO/S65 To Control SDO S72 OSC IN/S73 +5V S66/TESTIN COM1/S71 LCD Panel COM2/S70 (Up to 680 Segments) COM3/S69 COM4/S68 COM5/S67 VDD +5V (Note*1) S1/P1/G1 S9/P9/G9 S10 SCE S52 SCL SDI SYNCIO/S64 CLKIO/S65 SDO S66 SLAVE S72 +5V MS OSC IN/S73 KS1 / S53 KS6 / S58 KI1 / S59 KI5 / S63 2 Chip Mode(Master with Slave) (Note) Insert capacitors between VDD and VSS C0.1F Figure 1. Typical Application Circuit www.rohm.com TSZ02201-0P4P0D300970-1-2 2015 ROHM Co., Ltd. All rights reserved. 2/67 TSZ22111 15 001 18.Jul.2019 Rev.004