A96L322AEN

The A96L322AEN is a CMOS single-chip 8-bit microcontroller built around an M8051-compatible CISC core with an internal 1 MHz RC oscillator. It is designed for low-power, cost-effective smoke detector and alarm applications, integrating analog front-end functionality and system control peripherals on-chip.

With a compact 16-SOPN package and an operating range of 2.0–3.6 V and −40 to +85 °C, the A96L322AEN combines on-chip Flash, EEPROM and RAM with ADC, op-amps and dedicated current-sink capability to simplify sensor interfacing and alarm drive circuitry while supporting in-system programming and power-down modes for energy-efficient designs.

Key Features

• Core – 8-bit CISC M8051 compatible core (2 clocks per cycle) with an internal RC oscillator (1 MHz ±3.0%) and a minimum instruction execution time of 2 µs at 1 MHz.
• Memory – 4 Kbytes on-chip Flash with ISP; sector endurance specified (10,000 cycles for sectors 0–123, 100,000 cycles for sectors 124–127). Includes 256 bytes iRAM and 128 bytes data EEPROM (100,000 cycle endurance).
• Analog & Signal Conditioning – 10-bit ADC with 9 input channels and 2-channel operational amplifier with rail-to-rail output plus a programmable gain amplifier for on-chip sensor signal conditioning.
• Drive & Output – Two-channel constant sink current generator with 16-step selection and maximum sink current up to 274 mA for direct drive of alert elements.
• Timers & PWMs – Watchdog Timer (WDT), Basic Interval Timer (BIT), 8-bit timers, and two 16-bit timers (T0/T1) with programmable pulse generation and a dedicated siren function driven by T1.
• Interfaces – USART providing UART or SPI modes (one 8-bit UART or one 8-bit SPI) and a line interface supporting multiple Rx/Tx modes; 14 GPIO pins (P0[7:0], P1[5:0]).
• System Reliability – On-chip Power-On Reset (POR) with 1.4 V reset release level, Low Voltage Reset (three selectable levels: 1.60/2.20/2.70 V), watchdog timer, and Flash/CRC checksum generation for integrity checks.
• Low Power – STOP and IDLE power-down modes and operation down to 2.0 V (specified for 0.125–1 MHz with internal RC oscillator) for battery-powered applications.
• Package & Environment – 16-SOPN (150 mil) Pb-free surface-mount package with industrial temperature range −40 to +85 °C.

Typical Applications

• Smoke Detectors and Fire Alarms – Integrated ADC, op-amps and siren/timer support make the device suited for sensing, signal conditioning and alarm drive in smoke detection systems.
• Battery-Powered Alarm and Sensor Systems – Low-voltage operation, STOP/IDLE modes and on-chip watchdog/ POR/LVR provide energy-efficient, reliable control for battery-backed devices.
• Sensor Interfacing and Signal Conditioning – 10-bit ADC with multiple channels plus rail-to-rail op-amps and PGA enable compact analog front-end designs for a range of sensors.
• Siren and Alert Modules – Dedicated siren support via Timer 1 and high-current constant-sink outputs allow direct drive of alert elements without external driver ICs.
• Serial Peripheral Control – On-chip USART (UART/SPI) and flexible line interface provide simple serial communication for peripheral modules and diagnostic interfaces.

Unique Advantages

• Highly integrated analog and drive capabilities: On-chip 10-bit ADC, rails-to-rail op-amps, PGA and a two-channel constant sink generator reduce external BOM and simplify sensor-to-actuator signal paths.
• Dedicated alarm support: Timer-based siren function and high-current sink steps (up to 274 mA) enable compact, single-chip alarm solutions.
• Robust nonvolatile memory: Flash with ISP and sector endurance details plus 128 B EEPROM (100k cycles) support field updates and durable parameter storage.
• Power-aware operation: STOP and IDLE modes combined with low-voltage operation down to 2.0 V make the device suited for constrained, battery-operated systems.
• Built-in reliability features: POR, multi-level LVR, watchdog timer and CRC/checksum generation help maintain system integrity and safe operation in critical applications.
• Compact industrial package: Pb-free 16-SOPN surface-mount package with −40 to +85 °C rating supports space-constrained, temperature-varied deployments.

Why Choose A96L322AEN?

The A96L322AEN positions itself as a compact, application-focused microcontroller that integrates the core peripherals needed for alarm and sensing designs—combining an M8051-compatible core, on-chip Flash and EEPROM, analog front end and dedicated drive capabilities in a single 16-SOPN package. Its combination of low-voltage operation, power-down modes and reliable reset/watchdog features supports long-lived, battery-conscious systems with straightforward field updates via ISP.

This device is ideal for engineers designing smoke detectors, battery-powered alarm modules and sensor interface controllers who require on-chip analog processing, direct-drive capability and proven memory endurance in an industrial-temperature, surface-mount package.

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