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NXP Semiconductors P87LPC762FN,112
- Part No.:
- P87LPC762FN,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
P87LPC762FN,112.pdf
- Description:
- IC MCU 8BIT 2KB OTP 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,793
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Product details
Overview
P87LPC762FN,112 from NXP Semiconductors (formerly Philips) is a 20-pin, low-power, OTP-based 80C51-compatible microcontroller with 2 kbyte on-chip EPROM, 128 byte RAM, dual 16-bit timers, two analog comparators, full-duplex UART, and I²C interface - designed for cost-sensitive industrial control and sensor interface applications operating from 2.7 V to 6.0 V.
For engineers reviewing the P87LPC762FN,112 datasheet, P87LPC762FN,112 pinout, P87LPC762FN,112 application, or P87LPC762FN,112 equivalent, key selection criteria include its 20 MHz/10 MHz dual-voltage operation, programmable port output modes (quasi-bidirectional/open-drain/push-pull), on-chip RC oscillator eliminating external crystals, and 1 µA Power Down current for battery-powered systems.
Technical Context
The P87LPC762FN,112 implements an accelerated 80C51 core executing all instructions in 300–600 ns at 20 MHz (VDD = 4.5–6.0 V) or 10 MHz (VDD = 2.7–6.0 V), with 6-clock-cycle machine cycles. Its dual analog comparators support independent reference and input configurations, while the I²C port operates in master/slave mode with open-drain SCL/SDA outputs conforming to I²C bus specifications.
It integrates a watchdog timer with dedicated on-chip oscillator (no external components), selectable timeout (8 values), and oscillator fail detect capability. Power management includes Brownout Detection (selectable 2.5 V or 3.5 V threshold), Power-On Reset, Idle Mode, and Power Down Mode with wake-up via low-level interrupt on any of 15 I/O pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | Accelerated 80C51 CPU, 2× instruction speed vs standard 80C51, 6-clock machine cycle |
| Memory | 2 kbyte OTP EPROM code memory + 128 byte RAM + 32-byte customer code space |
| Operating Voltage | 2.7 V to 6.0 V - supports single-supply battery (3 V) and industrial (5 V) operation |
| Max Clock Frequency | 20 MHz at 4.5–6.0 V; 10 MHz at 2.7–6.0 V - enables performance scaling with supply |
| Power Consumption | Typical 1 µA in Power Down mode - extends battery life in always-on sensor nodes |
| I/O Capability | 15–18 configurable I/O pins with LED drive (20 mA), Schmitt-trigger inputs, and slew-rate control (~10 ns ramp) |
| Peripherals | Dual 16-bit timers, full-duplex UART, I²C interface, two analog comparators, keypad interrupt (8 inputs) |
Pinout & Package
Package: 20-pin Plastic Dual In-Line Package (DIP), SOT146–1 footprint, rated for –45 °C to +85 °C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CMP2/P0.0) | Comparator 2 output / Port 0 bit 0 | Configurable I/O; outputs comparator result or general-purpose signal |
| 13 (P0.6) | Comparator 1 output | Dedicated analog comparator output; no software masking required |
| 16 (P0.5) | Comparator reference (negative) input | Shared reference node for both comparators; enables ratiometric sensing |
| 17–20 (P0.4–P0.1) | Comparator positive inputs (CIN1A/B, CIN2A/B) | Four independent analog inputs supporting dual-window or differential comparisons |
| 9 (SDA/INT0/P1.3) | I²C data / External interrupt 0 / Port 1 bit 3 | Open-drain configuration ensures I²C bus compliance; double-function reduces pin count |
| 10 (SCL/T0/P1.2) | I²C clock / Timer 0 input / Port 1 bit 2 | Open-drain clock line; also serves as counter input for event timing |
| 11 (P1.1/RxD) | UART receive input | Full-duplex serial communication channel; supports asynchronous protocols up to 115.2 kbps |
| 12 (P1.0/TxD) | UART transmit output | Drives RS-232 level shifters or direct logic-level peripherals |
| 6 (X1/P2.1) | Oscillator input / Port 2 bit 1 | Accepts crystal, resonator, or external clock; reconfigurable as GPIO when RC oscillator selected |
| 7 (X2/CLKOUT/P2.0) | Oscillator output / CPU clock divider output | Provides 1/6 CPU clock for system synchronization or test probing |
Key Features
| Feature | Design Value |
|---|---|
| On-chip RC oscillator | Eliminates external crystal/resonator; enables zero-component clocking for lowest BOM cost |
| Programmable port output types | Quasi-bidirectional, open-drain, push-pull, and input-only modes per pin - simplifies interface to LEDs, switches, and I²C buses |
| Dual analog comparators | Independent configuration per comparator with shared reference; supports voltage monitoring and window detection without ADC |
| Watchdog with fail-detect | Dedicated internal oscillator ensures watchdog remains active even if main oscillator fails - critical for safety-critical embedded systems |
| Low-voltage reset/interrupt | Selectable 2.5 V or 3.5 V brownout threshold with optional interrupt generation - enables graceful shutdown before data corruption |
Applications
| Industrial Sensor Node | Smart Appliance Control |
|---|---|
Use Scenario: Battery-powered temperature/humidity monitor with local alert and I²C sensor interface. IC Role / Device Role / Timing Role: Main controller executing sensor polling, comparator-based threshold detection, and UART logging. Use Value: 1 µA Power Down current extends 10-year battery life; on-chip RC oscillator eliminates crystal cost and layout area. | Use Scenario: Washing machine control board managing motor sequencing, water level sensing, and user interface. IC Role / Device Role / Timing Role: System supervisor handling keypad interrupts, analog comparator-based lid switch detection, and UART diagnostics. Use Value: Eight keypad interrupt inputs reduce external logic; LED drive capability (20 mA) directly drives status indicators. |
| Energy Meter Interface | Legacy Equipment Retrofit |
Use Scenario: Pulse-counting interface between mechanical energy meter and smart grid concentrator. IC Role / Device Role / Timing Role: Pulse accumulator using Timer 1 in counter mode, with UART reporting to host MCU. Use Value: Dedicated T1 input pin (P0.7) accepts high-frequency pulses; 2.7–6.0 V range accommodates wide utility supply variations. | Use Scenario: Replacement for obsolete 80C51 designs requiring pin-compatible upgrade with enhanced peripherals. IC Role / Device Role / Timing Role: Drop-in functional replacement with identical 80C51 instruction set and memory map. Use Value: Accelerated core delivers 2× throughput without firmware changes; OTP memory preserves legacy programming workflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| P89LPC922FA,112 | Enhanced 80C51 core with 2 kB flash (not OTP), 256 B RAM, built-in ISP, higher ESD rating (4 kV HBM) | Supports field firmware updates; requires ISP programming infrastructure | Choose for designs needing reprogrammability and higher robustness; not OTP-replacement compatible |
| AT89LP2052-20PU | 8051-compatible with 2 kB flash, 128 B RAM, 20 MHz max, but lacks I²C, comparators, and on-chip RC oscillator | No analog comparator or I²C hardware - requires external components for same functionality | Choose only if I²C and analog compare functions are unnecessary; higher pin count needed for equivalent features |
Compared with P87LPC762FN,112, the P89LPC922FA,112 offers field-upgradable flash and better ESD immunity but requires ISP support, while the AT89LP2052-20PU lacks integrated analog and I²C peripherals - making P87LPC762FN,112 uniquely suited for cost-optimized, self-contained sensor and control nodes.
Availability
P87LPC762FN,112 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart appliance control, energy meter interfaces, and legacy equipment retrofit requiring stable component supply across extended temperature ranges.
Supply support for P87LPC762FN,112 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor company formed from the spin-off of Philips Semiconductors in 2006, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.
The P87LPC762FN,112 belongs to NXP's LPC700 family of low-pin-count 80C51 microcontrollers, designed specifically for cost-sensitive, space-constrained embedded applications where integration of analog functions, serial interfaces, and ultra-low power operation is essential.
FAQ
What is the maximum operating frequency of the P87LPC762FN,112 and under what voltage conditions?
The P87LPC762FN,112 operates at up to 20 MHz when supplied at 4.5–6.0 V, and up to 10 MHz when supplied at 2.7–6.0 V. This dual-speed specification allows flexible deployment across both 3 V battery-powered and 5 V industrial systems without changing the P87LPC762FN,112 part number or firmware.
Does the P87LPC762FN,112 support in-system programming (ISP) or require external EPROM programmers?
The P87LPC762FN,112 uses one-time-programmable (OTP) EPROM and requires external parallel EPROM programming - it does not support in-system programming. Programming is performed before soldering using standard EPROM programmers compatible with 2 kbyte OTP devices, and security bits prevent unauthorized readback of the P87LPC762FN,112 firmware.
How many I/O pins does the P87LPC762FN,112 provide, and what output configurations are supported?
The P87LPC762FN,112 provides a minimum of 15 I/O pins and up to 18 when using on-chip oscillator and reset options. Each pin supports programmable output modes: quasi-bidirectional, open-drain (for I²C), push-pull (for LED drive), or input-only - configured independently via SFR registers P0M1/P0M2 and P1M1/P1M2.
Can the P87LPC762FN,112 operate without an external crystal or resonator?
Yes, the P87LPC762FN,112 includes a configurable on-chip RC oscillator that eliminates the need for external timing components. When enabled via EPROM configuration bits, the RC oscillator allows full operation with only VDD and VSS connections - reducing BOM cost and PCB area for the P87LPC762FN,112 in low-complexity designs.
What are the power management features of the P87LPC762FN,112, and how low is the standby current?
The P87LPC762FN,112 supports Idle Mode and Power Down Mode, with typical Power Down current of 1 µA. It includes Brownout Detection (selectable 2.5 V or 3.5 V), Power-On Reset, and wake-up from Power Down via any low-level interrupt input - enabling reliable low-power operation in battery-backed P87LPC762FN,112 applications.
P87LPC762FN,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Series:
- LPC700
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 20MHz
- Connectivity:
- I2C, UART/USART
- Peripherals:
- Brown-out Detect/Reset, LED, POR, WDT
- Number of I/O:
- 18
- Program Memory Size:
- 2KB (2K x 8)
- Program Memory Type:
- OTP
- EEPROM Size:
- -
- RAM Size:
- 128 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 6V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
P87LPC762FN,112 FAQ
1.How can I place an order for P87LPC762FN,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for P87LPC762FN,112 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for P87LPC762FN,112 reliable?
The price and inventory of P87LPC762FN,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P87LPC762FN,112 is usually 5 days.
3.What payment methods are accepted for P87LPC762FN,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P87LPC762FN,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P87LPC762FN,112?
P87LPC762FN,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P87LPC762FN,112 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for P87LPC762FN,112?
For technical support, including P87LPC762FN,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P87LPC762FN,112 requirements.
6.How does Aetrix verify that P87LPC762FN,112 is sourced from the original manufacturer or authorized distributors?
All P87LPC762FN,112 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that P87LPC762FN,112 meets industry standards.
7.What is the process for return or replacement of P87LPC762FN,112?
All P87LPC762FN,112 units undergo pre-shipment inspection (PSI). If there is an issue with P87LPC762FN,112, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The P87LPC762FN,112 part is unused and in its original packaging.
Return procedure for P87LPC762FN,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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