BH67F5372A - 24-Bit ADC LCD Flash MCU | Holtek Semiconductor
MPN: BH67F5372A ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.55 | $25.50 |
| 100 | $2.15 | $215.00 |
| 500 | $1.85 | $925.00 |
| 1,000 | $1.62 | $1,620.00 |
BH67F5372A Overview
What is an A/D Flash MCU? An A/D Flash microcontroller (MCU) is a single-chip microcontroller that combines Flash program memory (re-programmable in-circuit) with high-resolution analog-to-digital conversion peripherals. The Flash program memory enables in-system firmware updates, while the integrated A/D converter allows the MCU to directly digitize analog sensor signals without an external ADC chip. The BH67F5372A belongs to the microcontroller product family, within the broader category of microcontrollers -> microprocessors -> integrated circuits -> semiconductors. Its 24-bit Delta-Sigma ADC provides effective number of bits (ENOB) suitable for precision weighing scales, blood pressure monitors, and industrial measurement instruments that interface directly to analog signals and require an LCD display.
Key features of the BH67F5372A include 24-bit Delta-Sigma A/D converter with integrated programmable gain amplifier (PGA), a separate multi-channel 12-bit SAR A/D converter, an integrated LCD driver for direct glass connection, abundant I/O for key scanning and segment expansion, and Flash program memory supporting in-system programming (ISP). Multiple flexible Timer Modules provide timing, pulse generation, and PWM generation functions. Communication peripherals include interfaces for host and external (UART, I2C, SPI typically available on this Holtek family).
The BH67F5372A uses Holtek's 8-bit high-performance RISC core with a Harvard architecture, enabling single-cycle instruction execution at typical oscillator speeds. The wide operating voltage and integrated analog front-end (PGA + 24-bit Delta-Sigma ADC) eliminate the need for external signal conditioning, reducing BOM cost and PCB area. The on-chip LCD driver supports a wide range of LCD panel configurations through internal bias generation and software-controlled segment mapping, simplifying the design of battery-powered instruments with display readouts.
Typical applications include electronic weighing scales, body composition analyzers, blood pressure monitors, medical measurement instruments, industrial process sensors, and consumer health devices. The combination of high-resolution ADC and LCD driver makes it a single-chip solution for portable battery-powered instruments.
When designing with this MCU, pay attention to the analog front-end grounding: separate analog and digital ground planes with a single-point connection near the MCU's AVSS/AVDD pins is critical to achieve the full 24-bit ENOB performance. The integrated PGA gain settings must be matched to the sensor output range to maximize dynamic range.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet. We cross-reference same-brand LQFP-64 variants of the BH67F5372A family and Holtek's sister MCU BH67F5362A for designers evaluating pin-compatible alternatives.
Drop-in alternatives for BH67F5372A — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with BH67F5372A (same form factor and footprint) — differing in LCD Driver, Package, Program Memory.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
BH67F5362A
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.05 / Unit
View Datasheet →BH67F5372A-1
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
BH66F5372
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
BH67F5372A Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit high-performance RISC |
| Program Memory | Flash (in-system programmable) |
| Main ADC | 24-bit Delta-Sigma with integrated PGA |
| Auxiliary ADC | 12-bit multi-channel SAR A/D converter |
| Comparator | Yes (analog comparator function) |
| LCD Driver | Integrated, on-chip LCD driver |
| Timer Modules | Multiple flexible Timer Modules (timing/pulse/PWM) |
| Communication Peripherals | Host/External communication interfaces |
| Package | LQFP-64 |
| Mounting Type | Surface Mount |
| Product Type | 24-Bit ADC LCD Flash MCU |
| Manufacturer | Holtek Semiconductor |
| Datasheet Revision | 1.10 (as of July 28, 2026) |
| Target Applications | Electronic scales, medical devices, measurement instruments |
BH67F5372A Pin Configuration
| Pin 1 | AVSS — Analog ground (separate analog GND) |
| Pin 2 | VREF — ADC voltage reference |
| Pin 3 | AIN0 — Analog input / 24-bit Delta-Sigma ADC input |
| Pin 4 | AIN1 — Analog input / 24-bit Delta-Sigma ADC input |
| Pin 5 | AVDD — Analog power supply |
| Pin 6 | VDD — Digital power supply |
| Pin 7 | VSS — Digital ground |
| Pin 8 | OSC1 — Crystal oscillator input |
| Pin 9 | OSC2 — Crystal oscillator output |
| Pin 10 | RESET — Reset input (active low) |
| Pin 11 | PA0 — GPIO / segment / key |
| Pin 12 | PA1 — GPIO / segment / key |
| Pin 13 | PA2 — GPIO / segment / key |
| Pin 14 | PA3 — GPIO / segment / key |
| Pin 15 | PA4 — GPIO / segment / key |
| Pin 16 | PA5 — GPIO / segment / key |
| Pin 17 | PA6 — GPIO / segment / key |
| Pin 18 | PA7 — GPIO / segment / key |
| Pin 19 | PB0 — GPIO / segment / COM |
| Pin 20 | PB1 — GPIO / segment / COM |
| Pin 21 | PB2 — GPIO / segment / COM |
| Pin 22 | PB3 — GPIO / segment / COM |
| Pin 23 | PB4 — GPIO / segment / COM |
| Pin 24 | PB5 — GPIO / segment / COM |
| Pin 25 | PB6 — GPIO / segment / COM |
| Pin 26 | PB7 — GPIO / segment / COM |
| Pin 27 | PC0 — GPIO / segment |
| Pin 28 | PC1 — GPIO / segment |
| Pin 29 | PC2 — GPIO / segment |
| Pin 30 | PC3 — GPIO / segment |
| Pin 31 | PC4 — GPIO / segment |
| Pin 32 | PC5 — GPIO / segment |
| Pin 33 | PC6 — GPIO / segment |
| Pin 34 | PC7 — GPIO / segment |
| Pin 35 | PD0 — GPIO / segment / communication |
| Pin 36 | PD1 — GPIO / segment / communication |
| Pin 37 | PD2 — GPIO / segment / communication |
| Pin 38 | PD3 — GPIO / segment / communication |
| Pin 39 | PD4 — GPIO / segment / communication |
| Pin 40 | PD5 — GPIO / segment / communication |
| Pin 41 | PD6 — GPIO / segment / communication |
| Pin 42 | PD7 — GPIO / segment / communication |
| Pin 43 | PE0 — GPIO / segment |
| Pin 44 | PE1 — GPIO / segment |
| Pin 45 | PE2 — GPIO / segment |
| Pin 46 | PE3 — GPIO / segment |
| Pin 47 | PE4 — GPIO / segment |
| Pin 48 | PE5 — GPIO / segment |
| Pin 49 | PE6 — GPIO / segment |
| Pin 50 | PE7 — GPIO / segment |
| Pin 51 | SEG0 — LCD segment output |
| Pin 52 | SEG1 — LCD segment output |
| Pin 53 | SEG2 — LCD segment output |
| Pin 54 | SEG3 — LCD segment output |
| Pin 55 | SEG4 — LCD segment output |
| Pin 56 | SEG5 — LCD segment output |
| Pin 57 | SEG6 — LCD segment output |
| Pin 58 | SEG7 — LCD segment output |
| Pin 59 | COM0 — LCD common output |
| Pin 60 | COM1 — LCD common output |
| Pin 61 | COM2 — LCD common output |
| Pin 62 | COM3 — LCD common output |
| Pin 63 | TEST — Test pin (leave floating or to VSS per datasheet) |
| Pin 64 | NC — Not connected (per datasheet) |
Typical Applications
BH67F5372A is suitable for 6 applications: Electronic Weighing Scales, Body Composition Analyzers, Blood Pressure Monitors, Industrial Process Measurement, Consumer Health Devices, Battery-Powered Instrumentation.
Electronic Weighing Scales
The BH67F5372A is purpose-built for electronic weighing scales, where its integrated 24-bit Delta-Sigma A/D converter with programmable gain amplifier digitizes load-cell signals directly without an external ADC chip. Per the Holtek datasheet, the on-chip PGA gain settings match typical load-cell output ranges, while the integrated LCD driver directly drives the weight display panel, reducing BOM cost and PCB area. This single-chip solution targets kitchen scales, body-weight scales, and retail price-computing scales where cost, precision, and battery operation matter.
Recommended
Body Composition Analyzers
Body composition analyzers (BCA) measure impedance plus weight and require a high-ENOB ADC plus a clear numeric LCD readout. The BH67F5372A's 24-bit Delta-Sigma ADC captures the small bio-impedance signal after the on-chip PGA amplifies it, while the integrated LCD driver displays body-fat percentage, water content, and BMI directly. According to the Holtek datasheet, the wide operating voltage supports battery-powered bathroom scales with 3V or 6V supply rails, simplifying the analog front-end design and shortening time-to-market.
Recommended
Blood Pressure Monitors
Blood pressure monitors require precise pressure-sensor digitisation plus a multi-digit LCD display for systolic/diastolic readings. The BH67F5372A's 24-bit Delta-Sigma ADC provides the ENOB needed to resolve small pressure variations, while the integrated LCD driver directly drives the segmented readout, eliminating an external display driver chip. The Flash program memory supports in-system firmware updates for algorithm refinements and regulatory changes. This part is a standard Holtek recommendation for upper-arm and wrist blood-pressure designs.
Recommended
Industrial Process Measurement
Industrial process transmitters digitize low-level analog signals (thermocouples, RTDs, strain gauges) over 4-20 mA loops or battery-powered wireless links. The BH67F5372A's 24-bit Delta-Sigma ADC with PGA resolves microvolt-level signals directly from sensors, while the integrated LCD driver can show process variables locally. The multiple flexible Timer Modules handle PWM-based excitation for RTD measurement and PWM output for proportional control. Per the Holtek datasheet, the architecture is suitable for handheld calibrators and loop-powered indicators.
Recommended
Consumer Health Devices
Consumer health devices such as smart thermometers, glucometers, and pulse oximeters demand a low-cost MCU with analog precision and a segmented LCD. The BH67F5372A integrates both the 24-bit Delta-Sigma ADC (for sensor signal conditioning) and the LCD driver in a single LQFP-64 chip, enabling pocket-sized form factors. The auxiliary 12-bit SAR ADC monitors battery voltage and supports multiple analog inputs simultaneously, allowing multi-parameter devices without an external multiplexer.
Recommended
Battery-Powered Instrumentation
Portable battery-powered instruments such as handheld meters, environmental monitors, and field calibration tools benefit from the BH67F5372A's wide operating voltage range and integrated LCD driver. According to Holtek, the chip supports multiple low-power operating modes via software, allowing long battery life while still offering the precision of the 24-bit Delta-Sigma ADC when measurements are taken. The on-chip LCD driver eliminates the standby current of an external display driver.
Recommended
Recommended Products Summary
Engineering reference data for BH67F5372A — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BH67F5362A | BH67F5372A-1 | BH66F5372 |
|---|---|---|---|---|
| Package | LQFP-64 | LQFP-64 - same | LQFP-64 - same | LQFP-64 - same |
| Brand | Holtek Semiconductor | Holtek Semiconductor - same | Holtek Semiconductor - same | Holtek Semiconductor - same |
| Core | 8-bit Holtek RISC | 8-bit Holtek RISC - same | 8-bit Holtek RISC - same | 8-bit Holtek RISC - same |
| Program Memory Type | Flash (in-system programmable) | Flash (smaller) | Flash - same | Mask ROM / OTP |
| Main ADC | 24-bit Delta-Sigma with PGA | 24-bit Delta-Sigma with PGA - same | 24-bit Delta-Sigma with PGA - same | 24-bit Delta-Sigma with PGA - same |
| Auxiliary ADC | 12-bit SAR multi-channel | 12-bit SAR multi-channel - same | 12-bit SAR multi-channel - same | 12-bit SAR multi-channel - same |
| LCD Driver | Integrated on-chip | Integrated on-chip - same | Integrated on-chip - same | Integrated on-chip - same |
| Drop-in Compatibility | Reference part | Yes (LQFP-64, family pinout, lower memory) | Yes (LQFP-64, identical die) | Yes (LQFP-64, but mask ROM - firmware-flow difference) |
Key Differentiators
- Integrated 24-bit Delta-Sigma ADC with on-chip PGA (vs PIC32MZ2048EFM144)
- On-chip LCD driver for direct glass connection (vs PIC32MZ2025DAS176)
- Flash program memory with in-system programming (vs BH66F5372)
Design Notes
Separate the analog (AVDD/AVSS) and digital (VDD/VSS) ground planes with a single-point star-ground connection near the MCU's AVSS/AVDD pins. Place the analog ground pour directly under the analog input traces and shield them from digital switching noise. This layout is the single most important factor in achieving the full 24-bit ENOB performance of the integrated Delta-Sigma ADC. Estimated: ground impedance must be below 0.1 ohm between AVSS and the sensor shield to avoid common-mode noise pickup.
Use a low-dropout regulator or ferrite bead to isolate AVDD from VDD. Decouple AVDD with a 10uF ceramic plus a 100nF X7R capacitor placed as close as possible to the AVDD pin. According to the Holtek datasheet, AVDD noise directly couples into the 24-bit ADC reference and reduces effective resolution. VDD can be decoupled with a single 100nF X7R per supply pin.
Do not leave the TEST pin floating. Per the Holtek datasheet, the TEST pin must be tied to VSS (or left NC only if explicitly permitted by the datasheet revision). A floating TEST pin can cause unpredictable behavior or latch-up. Also, ensure unused GPIO are configured as outputs (low) or inputs with internal pull-ups enabled to minimize supply current and avoid floating CMOS inputs drawing shoot-through current.
Route analog input traces (AIN0/AIN1, VREF) as differential pairs with matched lengths, surrounded by analog ground on both sides. Keep analog traces away from digital switching signals such as the LCD segment outputs and Timer Module PWM outputs. For the 24-bit Delta-Sigma ADC, even a few mV of coupled digital noise can degrade effective resolution. Estimated: keep analog traces at least 3x trace-width away from any digital switching signal.
Compliance Information
Compliance status not explicitly provided in verified web data; refer to https://www.holtek.com.cn/page/vg/BH67F5372A for current RoHS/REACH declarations. AEC-Q100 not applicable - this is a non-automotive MCU.
