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BU97981KV-E2

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ROHM Semicon LCD Drivers, LQFP-64(10x10). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentdisplay modules - led drivers - display driversbu97981kv-e2factory-2.0.0extractor-text

Verified BU97981KV-E2

by Ray · last 31 Oct 2026 · 1 record · files match
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Verification log 1 record

31 Oct 2026RayPublished by the parts factory: tier mfr, 64 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: BU97981KV-E2 · LQFP-64(10x10) · 64 pins
  • ✓copper: 64 copper pads, none touching another net
  • ✓datasheet: all 64 pin names found in the 49-page datasheet
  • ✓distributor: lcsc C2677665, digikey BU97981KV-E2TR-ND, mouser 755-BU97981KV-E2
  • ✓family: LQFP-64_10x10mm_P0.5mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-n2434vis/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 64 pins = 64 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 64 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ bu97981kv-e2.kicad_sym✓ bu97981kv-e2.kicad_mod✓ bu97981kv-e2.step
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Contents

README

markdown

BU97981KV-E2

ROHM Semicon · LCD Drivers · LQFP-64(10x10)

BU97981KV-E2 from ROHM Semicon, in a LQFP-64(10x10). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 CSB input Chip select input, active low: the serial interface is selected when this pin is held L.
2 SCL input Serial data transfer clock input for the serial interface.
3 SD input Serial input data terminal for the serial interface.
4 VDD power_in Logic power supply; recommended operating range 1.8 V to 3.6 V (VSS = 0 V).
5 TEST1 input Test terminal; the datasheet requires it to be connected to VSS.
6 VSS1 power_in Ground (GND) for the logic and control circuits.
7 INHb input Display on/off select: H turns the display on, L turns it off (SEG/COM and GPO outputs go to VSS, LED drivers go Hi-Z); if unused, connect to VDD.
8 VLCD power_in LCD drive power supply; recommended operating range 3.3 V to 5.5 V.
9 COM0 output COMMON driver output 0 for the LCD.
10 COM1 output COMMON driver output 1 for the LCD.
11 COM2 output COMMON driver output 2 for the LCD.
12 COM3 output COMMON driver output 3 for the LCD.
13 SEG0 output SEGMENT output 0 for the LCD.
14 SEG1 output SEGMENT output 1 for the LCD.
15 SEG2 output SEGMENT output 2 for the LCD.
16 SEG3 output SEGMENT output 3 for the LCD.
17 SEG4 output SEGMENT output 4 for the LCD.
18 SEG5 output SEGMENT output 5 for the LCD.
19 SEG6 output SEGMENT output 6 for the LCD.
20 SEG7 output SEGMENT output 7 for the LCD.
21 SEG8 output SEGMENT output 8 for the LCD.
22 SEG9 output SEGMENT output 9 for the LCD.
23 SEG10 output SEGMENT output 10 for the LCD.
24 SEG11 output SEGMENT output 11 for the LCD.
25 SEG12 output SEGMENT output 12 for the LCD.
26 SEG13 output SEGMENT output 13 for the LCD.
27 SEG14 output SEGMENT output 14 for the LCD.
28 SEG15 output SEGMENT output 15 for the LCD/GPO.
29 SEG16 output SEGMENT output 16 for the LCD/GPO.
30 SEG17 output SEGMENT output 17 for the LCD/GPO.
31 SEG18 output SEGMENT output 18 for the LCD/GPO.
32 SEG19 output SEGMENT output 19 for the LCD/GPO.
33 SEG20 output SEGMENT output 20 for the LCD/GPO.
34 SEG21 output SEGMENT output 21 for the LCD/GPO.
35 SEG22 output SEGMENT output 22 for the LCD/GPO.
36 SEG23 output SEGMENT output 23 for the LCD/GPO.
37 SEG24 output SEGMENT output 24 for the LCD/GPO.
38 SEG25 output SEGMENT output 25 for the LCD/GPO.
39 SEG26 output SEGMENT output 26 for the LCD/GPO.
40 SEG27 output SEGMENT output 27 for the LCD/GPO.
41 SEG28 output SEGMENT output 28 for the LCD/GPO.
42 SEG29 output SEGMENT output 29 for the LCD/GPO.
43 SEG30 output SEGMENT output 30 for the LCD/GPO.
44 SEG31 output SEGMENT output 31 for the LCD/GPO.
45 SEG32 output SEGMENT output 32 for the LCD/GPO.
46 SEG33 output SEGMENT output 33 for the LCD/GPO.
47 SEG34 output SEGMENT output 34 for the LCD/GPO.
48 SEG35 output SEGMENT output 35 for the LCD/GPO.
49 SEG36 output SEGMENT output 36 for the LCD/GPO.
50 SEG37 output SEGMENT output 37 for the LCD/GPO.
51 SEG38 output SEGMENT output 38 for the LCD/GPO.
52 SEG39 output SEGMENT output 39 for the LCD/GPO.
53 SEG40 output SEGMENT output 40 for the LCD/GPO.
54 SEG41 output SEGMENT output 41 for the LCD/GPO.
55 SEG42 output SEGMENT output 42 for the LCD/GPO.
56 SEG43 output SEGMENT output 43 for the LCD/GPO.
57 SEG44 output SEGMENT output 44 for the LCD/GPO.
58 SEG45 output SEGMENT output 45 for the LCD/GPO.
59 SEG46 output SEGMENT output 46 for the LCD/LED driver.
60 SEG47 output SEGMENT output 47 for the LCD/LED driver.
61 SEG48 output SEGMENT output 48 for the LCD/LED driver.
62 VSS2 power_in GND for SEG46-48 and the LED driver.
63 PWMOUT output PWM output for the LED2 group.
64 CLKIN input External clock input for display/PWM (selectable); if unused, connect to VSS or leave open, and Hi-Z input is supported in internal clock mode.

Key specifications

Parameter Value
Manufacturer ROHM Semicon
Package LQFP-64(10x10)
Category Display Modules / LED Drivers / Display Drivers
Pins 64

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Hysteresis Width VH 0.2 V SCL, INHb, VDD=3.3V, Ta=25°C 6
"H" Level Input Current IIH1 5 µA SD, SCL, CSB, CLKIN, INHb, VI=3.6V 6
"L" Level Input Current IIL1 -5 µA SD, SCL, CSB, CLKIN, INHb, TEST1(Note4), VI=0V 6
"L" Level Output Voltage VOL1 0.4 V Iload= 50µA, VLCD=5.0V, SEG0 to SEG48 6
"L" Level Output Voltage VOL3 0.5 V Iload=1mA, VLCD=5.0V, SEG15 to SEG45 (GPOmode), PWMOUT 6
"L" Level Output Voltage VOL4 0.11 0.5 V Iload=20mA, VLCD=5.0V, SEG46 to 48 (LED drive mode) 6
Current Consumption IstVDD 3 10 µA Input terminal ALL'L', Display off, Oscillation off 6
Current Consumption IstVLCD 0.5 5 µA Input terminal ALL'L', Display off, Oscillation off 6
Current Consumption IVDD1 8 15 µA VDD=3.3V, Ta=25°C, 1/3bias, fFR=64Hz, PWM generate off, All output pin open 6
Current Consumption IVDD2 90 130 µA VDD=3.3V, Ta=25°C, 1/3bias, fFR=64Hz, PWM Frequency=500Hz setting, All output pin open 6
Current Consumption IVLCD1 10 15 µA VLCD=5.0V, Ta=25°C, 1/3bias, fFR=64Hz, Unused Integrated regulator, LED generate off, All output pin open 6
Current Consumption IVLCD2 25 40 µA VLCD=5.0V, Ta=25°C, 1/3bias, fFR=64Hz, Used Integrated regulator, LED generate off, All output pin open 6
Current Consumption IVLCD3 30 48 µA VLCD=5.0V, Ta=25°C, 1/3bias, fFR=64Hz, Used Integrated regulator, PWM Frequency=500Hz setting, All output pin open 6
Output Voltage 1 Vreg1 4.35 4.5 4.65 V 4.5V setting (VLCD=5.5V, Ta=-30°C to 75°C) (Note1) 8
Output Voltage 2 Vreg2 4.42 4.5 4.58 V 4.5V setting (VLCD=5.5V, Ta=25°C) (Note1) 8
Load Regulation delta Vreg 0.3 V Iout = -300µA (Note1) 8
Frame Frequency 1 fFR1 57.6 64 70.4 Hz VDD=3.3V, Ta=25°C, fFR=64Hz setting 8
Frame Frequency 2 fFR2 51.2 64 73 Hz VDD=2.5V to 3.6V fFR=64Hz setting 8
Frame Frequency 3 fFR3 45 64 Hz VDD=1.8V to 2.5V fFR=64Hz setting 8
CLKIN Input Frequency fCLK 2 4 MHz 8
Input Rise Time tr 50 ns 9
Input Fall Time tf 50 ns 9
SCL Cycle Time tSCYC 250 ns 9
"H" SCL Pulse Width tSHW 50 ns 9
"L" SCL Pulse Width tSLW 50 ns 9
SD Setup Time tSDS 50 ns 9
SD Hold Time tSDH 50 ns 9
CSB Setup Time tCSS 50 ns 9
CSB Hold Time tCSH 50 ns 9
"H" CSB Pulse Width tCHW 50 ns 9
Power Supply Voltage 1 VDD 1.8 3.6 V Power supply; Ta=-30°C to +75°C, VSS=0V 5
Power Supply Voltage 2 VLCD 3.3 5.5 V Power supply for LCD; Ta=-30°C to +75°C, VSS=0V 5
LED Supply Voltage VLED 1 V Power supply for LED 5
Output Current Iout4 20 mA Per LED port 1ch 5
Output Current Iout4 60 mA Total LED port current 5
Power Supply Voltage 1 VDD -0.3 4.5 V Power supply (VSS=0V) 5
Power Supply Voltage 2 VLCD -0.5 7 V Power supply for LCD (VSS=0V) 5
Power Dissipation Pd 1 W BU97981KV; Note1: when used above Ta=25°C subtract 10mW per degree (ROHM standard board) 5
Input Voltage Range VIN -0.5 V 5
Operational Temperature Range Topr -30 75 °C 5
Storage Temperature Range Tstg -55 125 °C 5
Output Current Iout1 5 mA SEG output 5
Output Current Iout3 10 mA GPO output 5
Output Current Iout4 50 mA LED output 5

CAD (KiCad official)

  • Symbol: BU97981KV-E2
  • Footprint: Package_QFP:LQFP-64_10x10mm_P0.5mm
  • 3D model: LQFP-64(10x10) (KiCad packages3D, STEP)
  • 3D model files: bu97981kv-e2-etched.step / bu97981kv-e2-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bu97981kv-e2.step / bu97981kv-e2.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: ROHM Semicon datasheet (49 pp, sha256 25d5fc4e47d0a275, retrieved 2026-10-31, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF