BH67F5362A - 24-bit Delta-Sigma A/D LCD Flash MCU | Holtek
MPN: BH67F5362A ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.65 | $16.50 |
| 100 | $1.42 | $142.00 |
| 500 | $1.2 | $600.00 |
| 1,000 | $1.05 | $1,050.00 |
BH67F5362A Overview
A microcontroller with an integrated 24-bit Delta-Sigma ADC is part of the precision-measurement MCU category, which sits hierarchically within MCU -> microcontroller -> embedded controller -> semiconductor. These MCUs combine a CPU core, on-chip peripherals, and a precision analog front end in a single device, removing the need for an external ADC and enabling low-noise, high-ENOB acquisition directly at the sensor.
Key features include a 24-bit Delta-Sigma A/D converter with programmable data rate and selectable gain, an integrated LCD driver supporting multiple bias and duty modes, multiple oscillator options (external HXT, internal HIRC 8/12/16 MHz, external LXT 32.768 kHz, internal LIRC) for low-power or high-throughput operation, and an In-Application Programming (IAP) interface for in-field firmware updates. Power-down and wake-up functions, along with rich communication peripherals (UART, I²C, SPI), make the BH67F5362A a flexible platform for battery-powered instrumentation.
The architecture is built on Holtek's 8-bit RISC core with a Harvard-style memory layout separating program Flash from data RAM and EEPROM. The Delta-Sigma modulator uses a switched-capacitor front end with a digital decimation filter, and the integrated LCD driver supports resistive or PWM-segment biasing with software-configurable frame frequency, allowing the MCU to drive a multi-segment glass directly without an external charge-pump IC.
Typical applications include electronic weighing scales, sphygmomanometers (blood pressure monitors), body-thermometers and glucometers, industrial process meters, and water/gas utility meters. The wide VDD range and rich peripherals also support HVAC sensor readouts and portable data loggers.
When designing with the BH67F5362A, ensure the analog front-end layout follows Holtek's reference design: a guard ring around the ADC input traces, separate analog and digital ground planes joined at a single point, and a 100 nF decoupling capacitor within 5 mm of each power pin. Use the internal EEPROM to store per-unit calibration constants; load them on every power-up to compensate for load-cell drift.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, including pinout references and In-Application Programming workflows validated against the official Holtek datasheet v1.10.
Drop-in alternatives for BH67F5362A — 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 BH67F5362A (same form factor and footprint) — differing in LCD Driver, Package, Program Memory.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
BH67F5372A
✅ Drop-In✓ In Stock
$1.62 / Unit
View Datasheet →BH66F5362
✅ Drop-In📋 Reference alternative (not in catalog)
BH67F5262
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
BH67F5362A Maximum Ratings & Electrical Characteristics
| Core | Holtek 8-bit RISC |
| Instruction Cycle | 0.25 µs @ 16 MHz, VDD = 5 V |
| Operating Voltage (fSYS = 8 MHz) | 1.8 V to 5.5 V |
| Operating Voltage (fSYS = 12 MHz) | 2.7 V to 5.5 V |
| Operating Voltage (fSYS = 16 MHz) | 3.3 V to 5.5 V |
| Program Memory | Flash (multi-programmable) |
| Data Memory | RAM |
| Non-volatile Memory | True EEPROM (calibration / serial number storage) |
| ADC Type | 24-bit Delta-Sigma |
| LCD Driver | Integrated, software-configurable bias / duty |
| Oscillator Options | HXT, HIRC (8/12/16 MHz), LXT (32.768 kHz), LIRC |
| Power-Down / Wake-Up | Yes (multiple modes) |
| In-Application Programming (IAP) | Yes |
| Package | LQFP-64 (10 mm × 10 mm, 0.5 mm pitch) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
BH67F5362A Pin Configuration
| Pin 1 | VDD — Power supply |
| Pin 2 | OSC1 — External high-speed crystal oscillator input |
| Pin 3 | OSC2 — External high-speed crystal oscillator output |
| Pin 4 | XTAL1 — External low-speed 32.768 kHz crystal input |
| Pin 5 | XTAL2 — External low-speed 32.768 kHz crystal output |
| Pin 6 | RESET — Reset input, active low |
| Pin 7 | VSS — Ground |
| Pin 8 | AVDD — Analog power supply |
| Pin 9 | AVSS — Analog ground |
| Pin 10 | VREF — ADC reference voltage |
| Pin 11 | AIN0+ — Differential ADC positive input |
| Pin 12 | AIN0- — Differential ADC negative input |
| Pin 13 | AIN1+ — Auxiliary ADC positive input |
| Pin 14 | AIN1- — Auxiliary ADC negative input |
| Pin 15 | PGAVSS — Programmable gain amplifier ground |
| Pin 16 | COM0 — LCD common line 0 |
| Pin 17 | COM1 — LCD common line 1 |
| Pin 18 | COM2 — LCD common line 2 |
| Pin 19 | COM3 — LCD common line 3 |
| Pin 20 | SEG0 — LCD segment 0 |
| Pin 21 | SEG1 — LCD segment 1 |
| Pin 22 | SEG2 — LCD segment 2 |
| Pin 23 | SEG3 — LCD segment 3 |
| Pin 24 | SEG4 — LCD segment 4 |
| Pin 25 | SEG5 — LCD segment 5 |
| Pin 26 | SEG6 — LCD segment 6 |
| Pin 27 | SEG7 — LCD segment 7 |
| Pin 28 | SEG8 — LCD segment 8 |
| Pin 29 | SEG9 — LCD segment 9 |
| Pin 30 | SEG10 — LCD segment 10 |
| Pin 31 | SEG11 — LCD segment 11 |
| Pin 32 | SEG12 — LCD segment 12 |
| Pin 33 | SEG13 — LCD segment 13 |
| Pin 34 | SEG14 — LCD segment 14 |
| Pin 35 | SEG15 — LCD segment 15 |
| Pin 36 | SEG16 — LCD segment 16 |
| Pin 37 | SEG17 — LCD segment 17 |
| Pin 38 | SEG18 — LCD segment 18 |
| Pin 39 | SEG19 — LCD segment 19 |
| Pin 40 | SEG20 — LCD segment 20 |
| Pin 41 | SEG21 — LCD segment 21 |
| Pin 42 | SEG22 — LCD segment 22 |
| Pin 43 | SEG23 — LCD segment 23 |
| Pin 44 | SEG24 — LCD segment 24 |
| Pin 45 | SEG25 — LCD segment 25 |
| Pin 46 | SEG26 — LCD segment 26 |
| Pin 47 | SEG27 — LCD segment 27 |
| Pin 48 | SEG28 — LCD segment 28 |
| Pin 49 | SEG29 — LCD segment 29 |
| Pin 50 | SEG30 — LCD segment 30 |
| Pin 51 | SEG31 — LCD segment 31 |
| Pin 52 | PA0 — GPIO / peripheral pin |
| Pin 53 | PA1 — GPIO / peripheral pin |
| Pin 54 | PA2 — GPIO / peripheral pin |
| Pin 55 | PA3 — GPIO / peripheral pin |
| Pin 56 | PB0 — GPIO / peripheral pin |
| Pin 57 | PB1 — GPIO / peripheral pin |
| Pin 58 | PB2 — GPIO / peripheral pin |
| Pin 59 | PB3 — GPIO / peripheral pin |
| Pin 60 | PC0 — GPIO / peripheral pin |
| Pin 61 | PC1 — GPIO / peripheral pin |
| Pin 62 | PC2 — GPIO / peripheral pin |
| Pin 63 | PC3 — GPIO / peripheral pin |
| Pin 64 | VSS — Ground |
Typical Applications
BH67F5362A is suitable for 6 applications: Electronic Weighing Scale, Blood Pressure Monitor (Sphygmomanometer), Digital Clinical Thermometer, Industrial Process Meter, Water / Gas Utility Meter, HVAC Sensor Readout Module.
Electronic Weighing Scale
The BH67F5362A is purpose-built for electronic weighing scales. Its 24-bit Delta-Sigma ADC directly digitizes a load-cell bridge with programmable gain, eliminating the need for an external analog front-end IC. The integrated LCD driver connects to a multi-segment glass display to show weight, unit and tare without extra driver chips, and the on-chip true EEPROM stores per-unit calibration constants and serial numbers. Operating from 1.8 V to 5.5 V at 8 MHz, it is also ideal for battery-powered kitchen and bathroom scales, while the IAP interface supports firmware updates for new unit conversions and tare algorithms.
Recommended
Blood Pressure Monitor (Sphygmomanometer)
The BH67F5362A's 24-bit ADC resolves the small pressure-sensor and cuff-pressure signals typical of a blood pressure monitor, while the integrated LCD driver displays systolic, diastolic and pulse rate on a multi-segment glass. Its wide 1.8 V to 5.5 V operation enables direct use of two AA alkaline cells, and the on-chip EEPROM stores user profiles, calibration data and last-reading history. Per Holtek datasheet v1.10, the integrated timer and PWM resources support cuff inflation control, while the UART / I²C interfaces provide connectivity to wireless modules for Bluetooth sphygmomanometer designs.
Recommended
Digital Clinical Thermometer
The BH67F5362A's 24-bit Delta-Sigma ADC delivers the resolution and noise floor required for thermistor or thermocouple-based clinical thermometers. With fSYS = 8 MHz the part runs at full performance from 1.8 V, enabling direct battery operation from a single coin cell. The LCD driver displays measured temperature with high contrast on a low-power segment glass, and the on-chip EEPROM retains calibration constants across battery replacement. The integrated 32.768 kHz LXT oscillator supports low-power sleep modes that extend battery life to multi-year timeframes.
Recommended
Industrial Process Meter
The BH67F5362A is a strong fit for industrial process meters measuring pressure, flow or level. Its 24-bit ADC provides the dynamic range to digitize 4–20 mA current-loop or bridge-sensor outputs, and its wide operating voltage from 1.8 V to 5.5 V simplifies loop-powered and line-powered meter designs. The integrated LCD driver supports multi-segment industrial glass, and rich peripherals (UART, SPI, I²C) enable Modbus / HART communication. Per Holtek datasheet v1.10, the wide -40 °C to +85 °C industrial temperature range supports deployment in harsh process-control environments.
Recommended
Water / Gas Utility Meter
The BH67F5362A's 24-bit ADC is well suited to interface with flow-sensor front ends in water and gas utility meters, and its LCD driver displays cumulative usage on a low-power segment display readable in low-power battery operation. The on-chip EEPROM retains tamper-detection logs and calibration constants across battery replacement, and the integrated LXT 32.768 kHz oscillator enables long-term RTC operation for time-stamped metering. Per Holtek datasheet v1.10, the part's power-down and wake-up functions allow multi-year battery life typical of residential utility meters.
Recommended
HVAC Sensor Readout Module
The BH67F5362A digitizes multiple analog temperature, humidity and pressure sensors with its 24-bit Delta-Sigma ADC and displays the values on the integrated LCD. Its 1.8 V to 5.5 V operation and rich peripherals (UART, SPI, I²C) support integration with HVAC controller networks. The IAP interface allows field firmware updates to add new sensor types or communication protocols. According to Holtek datasheet v1.10, the part's wide operating temperature range suits installation in plant rooms and rooftop HVAC cabinets.
Recommended
Recommended Products Summary
Engineering reference data for BH67F5362A — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BH67F5372A | BH66F5362 | BH67F5262 |
|---|---|---|---|---|
| Brand | Holtek Semiconductor | Holtek Semiconductor | Holtek Semiconductor | Holtek Semiconductor |
| Package | LQFP-64 | LQFP-64 (same) | LQFP-64 (same) | LQFP-64 (same) |
| ADC Resolution | 24-bit Delta-Sigma | 24-bit Delta-Sigma | 20-bit Delta-Sigma | 24-bit Delta-Sigma |
| Operating Voltage | 1.8 V to 5.5 V @ 8 MHz | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| LCD Driver | Integrated (multi-segment) | Integrated, higher segment count | Integrated | Integrated |
| EEPROM | True on-chip EEPROM | True on-chip EEPROM | True on-chip EEPROM | True on-chip EEPROM |
| In-Application Programming | Yes (IAP) | Yes (IAP) | Yes (IAP) | Yes (IAP) |
Key Differentiators
- Integrated 24-bit Delta-Sigma ADC removes external analog front end (vs BH66F5362)
- Cost-optimized within Holtek 24-bit A/D LCD MCU family (vs BH67F5372A)
- True on-chip EEPROM for calibration data retention (vs BH67F5262)
Design Notes
Place a guard ring around the ADC input traces (AIN0+/AIN0-/VREF) and join analog and digital grounds at a single point near the AVSS pin. Place a 100 nF decoupling capacitor within 5 mm of every VDD/AVDD pin and a bulk 10 µF capacitor near the regulator output. This layout is mandatory for achieving the rated ENOB of the 24-bit Delta-Sigma ADC; without it, ENOB drops by 2–4 bits due to digital switching noise coupling into the analog front end.
Do not assume the on-chip voltage regulator is automatically configured for your VDD range. Per Holtek datasheet v1.10, fix the trim voltage at 3 V for application voltages 1.8 V–3.6 V and at 5 V for 3.3 V–5.5 V. Failing to set the correct trim voltage can cause ADC reference drift and increased current consumption. Always confirm the trim setting via the configuration register before production release.
Use the LXT 32.768 kHz crystal oscillator with the power-down / wake-up functions for battery-powered metering applications. With proper duty cycling the BH67F5362A achieves multi-year battery life on residential water and gas meters per the Holtek datasheet. Estimated: at 3 V supply, 1 µA average current in power-down with periodic ADC sampling every 30 s yields >5 years of operation from a single 2.4 Ah lithium thionyl chloride cell.
Compliance Information
RoHS and REACH compliance per Holtek product page. Not AEC-Q100 qualified; this part is designed for consumer / industrial medical and metering applications, not automotive.
