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NXP Semiconductors LPC2157FBD100,551
- Part No.:
- LPC2157FBD100,551
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LPC2157FBD100,551.pdf
- Description:
- IC MCU 16/32B 512KB FLSH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,542
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Product details
Overview
LPC2157FBD100,551 from NXP Semiconductors is a 100-pin LQFP multi-chip module integrating an ARM7TDMI-S microcontroller (512 kB Flash, 32 kB SRAM) with a PCF8576D 32-segment × 4-backplane LCD controller. It operates at 60 MHz, supports USB 2.0 Full-Speed device mode with 2 kB endpoint RAM, and includes a 10-bit DAC and RTC with independent VBAT supply. It targets embedded instrumentation with integrated display control.
For engineers reviewing the LPC2157FBD100,551 datasheet, LPC2157FBD100,551 pinout, LPC2157FBD100,551 application, or LPC2157FBD100,551 equivalent, key selection criteria include its dual-role MCU+LCD-driver integration, 32 GPIO pins minimum, 5 V-tolerant I/O architecture, and absence of USB DMA RAM (distinguishing it from LPC2158).
Technical Context
The LPC2157FBD100,551 implements an ARM7TDMI-S core with AMBA AHB/APB bus architecture, featuring a 128-bit wide memory interface enabling 60 MHz operation without wait states. Its on-chip peripherals include two UARTs (16C550-compatible), two Fast I²C-bus interfaces (400 kbit/s), SPI/SSP with variable data length, and dual 10-bit ADCs (8-channel total).
Unlike the LPC2158, the LPC2157FBD100,551 excludes the 8 kB USB-accessible RAM and UP_LED/CONNECT signals. Its LCD controller uses dedicated SDA_LCD/SCL_LCD pins and outputs BP0–BP3 and S0–S31 directly, with on-chip 40×4-bit display RAM and auto-increment addressing to minimize CPU overhead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM7TDMI-S 32-bit RISC processor running at up to 60 MHz via PLL0; enables deterministic real-time execution for control firmware. |
| Memory | 512 kB on-chip Flash (in-system programmable) + 32 kB static RAM; sufficient for standalone bootloader, RTOS, and application code without external memory. |
| LCD Controller | Integrated PCF8576D supporting 32 segments × 4 backplanes; eliminates need for external LCD driver IC and reduces BOM count in metering displays. |
| Analog Peripherals | Two 10-bit ADCs (AD0: 6 channels; AD1: 8 channels) + one 10-bit DAC (AOUT); enables sensor signal acquisition and analog output generation in same package. |
| USB Interface | USB 2.0 Full-Speed device controller with 2 kB endpoint RAM; supports HID, CDC, and mass storage class implementations without external PHY. |
| Power Supply | Single 3.3 V ±10 % supply (VDD) with 5 V-tolerant I/O; simplifies power design and allows direct interfacing with legacy 5 V logic. |
| RTC | Low-power Real-Time Clock with independent VBAT pin and 32 kHz crystal input (RTCX1/RTCX2); maintains time during main power loss for data logging applications. |
Pinout & Package
Package: LQFP100 (plastic low-profile quad flat package; 100 leads; body 14 × 14 × 1.4 mm; SOT407-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (pins 11, 27, 33) | Main power supply | 3.3 V core/I/O supply; requires local decoupling per pin to ensure stable operation at 60 MHz. |
| VDDA (pin 96) | Analog power supply | Isolated 3.3 V supply for ADC/DAC; must be filtered separately from digital VDD to maintain 10-bit accuracy. |
| VSS (pins 6, 13, 32, 39, 40, 85, 95) | Ground reference | Multiple ground connections reduce impedance and suppress noise coupling into analog and digital domains. |
| AOUT (pin 97) | Analog output | Dedicated 10-bit DAC output; digital section disabled when configured as AOUT to prevent interference. |
| S0–S31 (pins 46–77) | LCD segment drivers | 32 dedicated outputs driving LCD segments; used with BP0–BP3 to form multiplexed display matrix. |
| BP0–BP3 (pins 42–45) | LCD backplane drivers | 4 backplane outputs enabling up to 4-layer LCD multiplexing; paired with S0–S31 for full 128-segment support. |
| SDA_LCD / SCL_LCD (pins 34, 35) | LCD I²C interface | Dedicated I²C bus for PCF8576D configuration; electrically isolated from main I²C0/I²C1 to avoid contention. |
| RESET (pin 83) | Asynchronous reset input | Active-low TTL-level input with hysteresis; forces hardware reset and bootloader entry if held low during power-up. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LCD controller | Eliminates external driver IC and reduces PCB area by ~25 mm² in portable instrument designs. |
| 5 V-tolerant I/O with glitch filtering | Enables direct connection to 5 V sensors and logic without level shifters; built-in 3 ns pulse rejection prevents false interrupts. |
| On-chip display RAM (40×4 bits) | Reduces CPU load by >70 % during LCD refresh cycles via auto-increment addressing and burst access. |
| Dual 10-bit ADC subsystems | Supports simultaneous sampling of voltage, current, and temperature in energy metering applications with <1 LSB INL. |
| USB 2.0 Full-Speed device stack | Allows firmware updates and data export over standard USB cables without requiring host-side drivers beyond Windows HID class. |
Applications
| Energy Metering | Industrial Panel Meters |
|---|---|
|
Use Scenario: Three-phase electricity meter with segmented LCD display showing kWh, voltage, current, and power factor. IC Role / Device Role / Timing Role: Main system controller executing metrology algorithms, managing LCD refresh via PCF8576D, and logging data to Flash. Use Value: Integrated LCD driver reduces component count by one IC and eliminates timing-critical software-driven segment scanning. |
Use Scenario: DIN-rail mounted process monitor displaying pressure, flow, and temperature readings with alarm indicators. IC Role / Device Role / Timing Role: Real-time data acquisition hub with dual ADCs sampling analog sensors, generating analog outputs via DAC, and updating 4-backplane LCD. Use Value: Single-chip solution replaces discrete MCU + LCD driver + DAC, cutting BOM cost by ~$1.20 and layout complexity. |
| Portable Test Equipment | Smart Home Thermostats |
|
Use Scenario: Handheld multimeter with 4-digit LCD, USB configuration interface, and battery-backed RTC for timestamped measurements. IC Role / Device Role / Timing Role: System-on-chip handling measurement processing, USB communication, RTC timekeeping, and LCD drive. Use Value: VBAT-powered RTC retains time across battery swaps; 5 V-tolerant I/O interfaces directly with legacy probe circuits. |
Use Scenario: Wi-Fi-connected thermostat using LCD for setpoint display, ambient sensing, and HVAC control signaling. IC Role / Device Role / Timing Role: Local display and sensor interface controller; communicates via UART to wireless module while maintaining local UI responsiveness. Use Value: On-chip 32 kB SRAM buffers sensor data during wireless transmission gaps; LCD controller ensures flicker-free display during RF activity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller-with-LCD-driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LPC2158FBD100 | Includes 8 kB USB-accessible RAM and UP_LED/CONNECT pins; identical MCU core, Flash, RAM, and LCD controller. | Required for USB device firmware requiring large endpoint buffers or SoftConnect functionality. | Select LPC2158FBD100 only if USB DMA RAM or hardware-controlled USB connect/disconnect is needed. |
| RA4M2-ECB | Arm Cortex-M23 core, 256 kB Flash, 64 kB SRAM, no integrated LCD controller; supports external segment drivers via GPIO or SPI. | Targets modern low-power IoT devices needing secure boot and higher performance, but requires external LCD driver. | Choose RA4M2-ECB for new designs prioritizing security, lower active power, and future scalability over LCD integration. |
Compared with LPC2158FBD100, the LPC2157FBD100,551 saves cost and layout space where USB DMA is unnecessary; versus RA4M2-ECB, it delivers immediate LCD integration but lacks TrustZone and advanced power modes.
Availability
LPC2157FBD100,551 is available at Aetrix Electronics and suitable for energy metering, industrial panel meters, portable test equipment, and smart home thermostats requiring stable component supply and long-term production continuity.
Supply support for LPC2157FBD100,551 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 leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The LPC2157FBD100,551 belongs to the LPC2000 ARM7-based microcontroller family, designed specifically for cost-sensitive embedded systems requiring high integration of analog, communication, and human-interface peripherals.
FAQ
What is the maximum operating frequency of the LPC2157FBD100,551?
The LPC2157FBD100,551 operates at up to 60 MHz using its on-chip PLL0. This frequency is achieved via a 128-bit wide memory interface that eliminates wait states, enabling deterministic real-time execution critical for control loops and metrology algorithms in the LPC2157FBD100,551.
Does the LPC2157FBD100,551 support USB device functionality?
Yes, the LPC2157FBD100,551 integrates a USB 2.0 Full-Speed device controller with 2 kB of dedicated endpoint RAM. It supports standard USB classes including HID and CDC, and requires no external PHY. The LPC2157FBD100,551 does not include the 8 kB USB DMA RAM found in the LPC2158 variant.
How many analog inputs does the LPC2157FBD100,551 provide?
The LPC2157FBD100,551 features two independent 10-bit ADC subsystems: ADC0 with six channels (AD0[0]–AD0[5]) and ADC1 with eight channels (AD1[0]–AD1[7]), totaling 14 analog inputs. Pins like P0[25] and P0[26] serve dual roles - for example, P0[25] functions as both GPIO and AOUT (DAC output).
What LCD configurations does the integrated PCF8576D support?
The PCF8576D in the LPC2157FBD100,551 supports 1 to 4 backplanes with up to 32 segments, enabling display formats from simple 7-segment digits to 128-segment alphanumeric modules. It includes 40×4-bit display RAM with auto-increment addressing, reducing CPU intervention during refresh cycles in the LPC2157FBD100,551.
Is the LPC2157FBD100,551 pin-compatible with the LPC2158FBD100?
Yes, the LPC2157FBD100,551 and LPC2158FBD100 share identical pinout and package (LQFP100). However, functional differences exist: LPC2157FBD100,551 lacks the 8 kB USB-accessible RAM and UP_LED/CONNECT pins present in LPC2158FBD100. These pins are no-connect in LPC2157FBD100,551.
LPC2157FBD100,551 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 100-LQFP
- Series:
- LPC2100
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ARM7®
- Core Size:
- 16/32-Bit
- Speed:
- 60MHz
- Connectivity:
- I2C, Microwire, SPI, SSI, SSP, UART/USART
- Peripherals:
- Brown-out Detect/Reset, LCD, POR, PWM, WDT
- Number of I/O:
- 38
- Program Memory Size:
- 512KB (512K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 32K x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 3.6V
- Data Converters:
- A/D 16x10b; D/A 1x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LPC2157FBD100,551 FAQ
1.How can I place an order for LPC2157FBD100,551 through Aetrix?
Please submit a Request for Quotation (RFQ) for LPC2157FBD100,551 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 LPC2157FBD100,551 reliable?
The price and inventory of LPC2157FBD100,551 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPC2157FBD100,551 is usually 5 days.
3.What payment methods are accepted for LPC2157FBD100,551?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPC2157FBD100,551 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPC2157FBD100,551?
LPC2157FBD100,551 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPC2157FBD100,551 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 LPC2157FBD100,551?
For technical support, including LPC2157FBD100,551 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPC2157FBD100,551 requirements.
6.How does Aetrix verify that LPC2157FBD100,551 is sourced from the original manufacturer or authorized distributors?
All LPC2157FBD100,551 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 LPC2157FBD100,551 meets industry standards.
7.What is the process for return or replacement of LPC2157FBD100,551?
All LPC2157FBD100,551 units undergo pre-shipment inspection (PSI). If there is an issue with LPC2157FBD100,551, 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 LPC2157FBD100,551 part is unused and in its original packaging.
Return procedure for LPC2157FBD100,551:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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