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Microchip Technology LPC47N217N-ABZJ
- Part No.:
- LPC47N217N-ABZJ
- Manufacturer:
- Microchip Technology
- Category:
- Specialized
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
LPC47N217N-ABZJ.pdf
- Description:
- IC INTERFACE SPECIALIZED 56QFN
- Quantity:
- Payment:
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Product details
Overview
LPC47N217N-ABZJ from SMSC is a 3.3 V, ACPI 2.0–compliant Super I/O controller with LPC interface, integrated 16C550A-compatible UART (16-byte FIFO, up to 460 kbps), IEEE 1284 EPP/ECP parallel port with ChiProtect™, and 13 GPIOs - deployed in PC motherboard I/O hub functions for legacy peripheral bridging.
For engineers reviewing the LPC47N217N-ABZJ datasheet, LPC47N217N-ABZJ pinout, LPC47N217N-ABZJ application, or LPC47N217N-ABZJ equivalent, key selection criteria include LPC bus timing compliance, serial/parallel port configurability via SCL registers, IO_PME#/IO_SMI# signal support, and RoHS-compliant 56-pin QFN (8×8 mm, 0.5 mm pitch) mechanical fit.
Technical Context
The LPC47N217N-ABZJ implements a multiplexed 8-bit LPC bus with 16-bit address qualification, Serial IRQ interface compatible with PCI CLKRUN#, and relocatable configuration registers supporting ISA Plug-and-Play v1.0a. It integrates an internally decoded 16-bit address bus and three DMA channel options.
Its parallel port supports IBM PC/AT, EPP 1.7/1.9, and ECP modes with hardware ChiProtect™ to prevent damage from powered printers during unpowered states; UART features programmable baud rate generator, modem control signals (nRTS1/nDTR1/nCTS1/RXD1), and 230/460 kbps operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Supply | 3.3 V nominal, 5 V tolerant - enables direct interfacing with legacy 5 V peripherals without level shifters. |
| LPC Interface | Multiplexed 8-bit command/address/data bus with 16-bit address qualification - reduces pin count vs ISA while maintaining full compatibility. |
| UART | 16C550A-compatible with 16-byte TX/RX FIFO and programmable baud generator - supports reliable high-speed serial communication up to 460 kbps. |
| Parallel Port | Multi-mode (Standard, EPP 1.7/1.9, ECP) with ChiProtect™ circuitry - prevents latch-up or damage when printer is powered before host. |
| GPIO Count | 13 general-purpose I/O pins - provides flexible system-level control, status monitoring, or hardware handshake extension. |
| Power Management | ACPI 2.0 and PC2001 compliant with IO_PME# and IO_SMI# pins - enables OS-directed power state transitions and system management interrupts. |
| Package | 56-pin QFN, 8×8 mm body, 0.5 mm pitch, RoHS-compliant - surface-mount footprint optimized for space-constrained motherboard layouts. |
Pinout & Package
Package: 56-pin QFN (JEDEC MO-220, MO-56-QFN-8x8), 8×8 mm body, 0.5 mm pitch, exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LAD0–LAD3 | LPC Bus Data/Address | Multiplexed 4-bit bidirectional data/address lines for LPC transactions. |
| LFRAME# | LPC Frame Strobe | Indicates start of LPC cycle; active-low synchronous control signal. |
| LDRQ# | LPC DMA Request | Open-drain DMA request output compatible with LPC DMA protocol. |
| LPCPD# | LPC Power Down | Active-low signal indicating LPC bus is in low-power state. |
| IO_PME# | Power Management Event | Open-drain output signaling wake event to chipset; requires external pull-up. |
| IO_SMI# | System Management Interrupt | Open-drain SMI assertion pin for firmware-controlled system management. |
| TXD1/RXD1 | UART Transmit/Receive | Full-duplex asynchronous serial data I/O for primary UART channel. |
| nRTS1/nCTS1 | UART Flow Control | Hardware handshaking signals for reliable high-speed serial transfers. |
| PD[0:7] | Parallel Port Data | 8-bit bidirectional data bus for parallel port operation in all supported modes. |
| GP10–GP14, GP23, GP4[1:7] | General Purpose I/O | 13 configurable digital I/Os usable as inputs, outputs, or interrupt sources. |
| IRQIN1#, IRQIN2# | External IRQ Inputs | Two dedicated interrupt request inputs for external device signaling. |
| SER_IRQ | Serialized IRQ Output | PCI-compatible serialized interrupt output supporting shared IRQ routing. |
Key Features
| Feature | Design Value |
|---|---|
| Software Configurable Logic (SCL) | Enables runtime reconfiguration of UART base address, parallel port mode, and IRQ/DMA assignments via internal registers. |
| ChiProtect™ Circuitry | Hardware protection against voltage backfeed from powered parallel printers, eliminating need for external isolation diodes. |
| Serial IRQ Interface | Supports PCI CLKRUN# handshake and serialized interrupt delivery - reduces IRQ pin count and simplifies routing on dense motherboards. |
| ACPI 2.0 Compliance | Provides standardized power-state entry/exit sequences (S0–S5) and hardware event reporting for OS-managed power control. |
| ISA Plug-and-Play v1.0a Support | Allows automatic enumeration and resource allocation under Windows, eliminating manual jumper/DIP-switch configuration. |
Applications
| Desktop Motherboard I/O Hub | Industrial Embedded Controller |
|---|---|
Use Scenario: Integrating legacy serial and parallel peripherals into modern x86-based desktop platforms with LPC-based chipsets. IC Role / Device Role / Timing Role: Central Super I/O hub managing UART, parallel port, GPIO, and power management signaling between CPU/chipset and legacy I/O devices. Use Value: Eliminates discrete UART/parallel port ICs and reduces BOM cost while maintaining full PC99/PC2001 compliance and Windows driver support. | Use Scenario: Enabling RS-232 diagnostics, parallel printer control, and field I/O expansion in fanless industrial PCs operating in extended temperature ranges. IC Role / Device Role / Timing Role: System-level I/O aggregator providing configurable, robust, and electrically protected interfaces for deterministic peripheral interaction. Use Value: ChiProtect™ ensures safe hot-plug of parallel printers; SCL allows field-updatable port configurations without hardware changes. |
| POS Terminal Baseboard | Thin Client Platform |
Use Scenario: Supporting receipt printers, barcode scanners, and magnetic stripe readers in retail point-of-sale systems with compact form factors. IC Role / Device Role / Timing Role: Legacy interface bridge delivering simultaneous UART (scanner), parallel (receipt printer), and GPIO (cash drawer trigger) functionality. Use Value: Single-chip integration reduces PCB area and improves reliability over multi-chip solutions; RoHS-compliant QFN aids automated assembly. | Use Scenario: Providing local serial console, parallel maintenance port, and hardware watchdog reset capability in ARM/x86 thin clients with minimal I/O expansion. IC Role / Device Role / Timing Role: Low-power, ACPI-aware I/O controller enabling remote management, secure boot coordination, and graceful shutdown via PME/SMI events. Use Value: IO_PME# and IO_SMI# enable firmware-triggered wake-from-sleep and secure system management without additional logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Super I/O controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Nuvoton NCT6776D | Integrated hardware monitor (temperature/voltage/fan), no ChiProtect™, 40-pin QFN package | Targeted at modern ATX motherboards requiring sensor telemetry; lacks parallel port protection for legacy printer use | Select when thermal monitoring is required and parallel port usage is limited or isolated |
| ITE IT8728F | Supports LPT/COM only in legacy ISA mode; no native LPC bus; 128-pin LQFP package | Designed for older platform designs with ISA bridges; incompatible with pure-LPC architectures | Choose only for backward-compatible upgrades where LPC-native interface is not mandatory |
Compared with NCT6776D and IT8728F, the LPC47N217N-ABZJ uniquely delivers ChiProtect™-enabled parallel port safety, native LPC integration without ISA bridge dependency, and compact 56-pin QFN packaging - making it optimal for space-constrained, printer-integrated, ACPI-compliant embedded systems.
Availability
LPC47N217N-ABZJ is available at Aetrix Electronics and suitable for desktop motherboard design, industrial embedded controller development, and POS terminal baseboard manufacturing requiring stable component supply and long-term RoHS-compliant sourcing.
Supply support for LPC47N217N-ABZJ 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
SMSC (Standard Microsystems Corporation) was a fabless semiconductor company specializing in connectivity, embedded control, and I/O solutions before its acquisition by Microchip Technology in 2012.
The LPC47N217N-ABZJ belongs to SMSC's Super I/O product line, engineered specifically to consolidate legacy PC peripheral interfaces (serial, parallel, GPIO, power management) onto a single LPC-connected device for PC99, PC2001, and ACPI 2.0–compliant platforms.
FAQ
What is the operating voltage range and I/O tolerance of the LPC47N217N-ABZJ?
The LPC47N217N-ABZJ operates at 3.3 V nominal supply and features 5 V-tolerant I/O pins. This allows direct connection to legacy 5 V peripherals such as parallel printers and RS-232 transceivers without external level-shifting circuitry. The 5 V tolerance applies to all GPIO, UART, and parallel port pins as specified in the SMSC LPC47N217N datasheet Revision 0.3. This characteristic is critical for backward compatibility in mixed-voltage system designs.
Does the LPC47N217N-ABZJ support ACPI-compliant power management?
Yes, the LPC47N217N-ABZJ is fully ACPI 2.0 compliant and implements hardware support for power state transitions (S0–S5), including dedicated IO_PME# and IO_SMI# pins. These signals interface directly with the platform chipset to enable OS-directed sleep/wake and firmware-managed system management. The LPC47N217N-ABZJ also meets PC2001 requirements, ensuring interoperability with Windows power management stacks and BIOS implementations.
What parallel port modes does the LPC47N217N-ABZJ support, and what is ChiProtect™?
The LPC47N217N-ABZJ supports Standard (IBM PC/AT), EPP 1.7/1.9, and ECP modes per IEEE 1284. Its ChiProtect™ circuitry is a hardware feature that prevents electrical damage when a powered parallel printer is connected while the LPC47N217N-ABZJ is unpowered or in reset. This eliminates the need for external protection diodes and improves system robustness in real-world deployment scenarios involving hot-plug printer connections.
How many UARTs and GPIOs does the LPC47N217N-ABZJ integrate?
The LPC47N217N-ABZJ integrates one full-function 16C550A-compatible UART with 16-byte transmit/receive FIFOs and programmable baud rate generation, plus 13 general-purpose I/O pins (GP10–GP14, GP23, GP4[1:7]). All GPIOs are software-configurable for input/output direction, interrupt capability, and pull-up/pull-down settings via internal SCL registers - enabling flexible board-level customization without hardware modifications.
Is the LPC47N217N-ABZJ pin-compatible with other SMSC Super I/O devices?
No, the LPC47N217N-ABZJ is not pin-compatible with other SMSC Super I/O devices such as the LPC47B272 or LPC47M102 due to differences in pin count (56 vs 100/128), package type (QFN vs LQFP), and signal mapping. Its 56-pin QFN footprint and specific LPC bus signal assignment (e.g., LAD0–LAD3, LFRAME#) are unique to the LPC47N217N family. Migration requires PCB layout revision and firmware register reconfiguration.
LPC47N217N-ABZJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 56-VFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Applications:
- Controller
- Interface:
- LPC
- Voltage - Supply:
- 3.3V
- Supplier Device Package:
- 56-QFN
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
LPC47N217N-ABZJ FAQ
1.How can I place an order for LPC47N217N-ABZJ through Aetrix?
Please submit a Request for Quotation (RFQ) for LPC47N217N-ABZJ 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 LPC47N217N-ABZJ reliable?
The price and inventory of LPC47N217N-ABZJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPC47N217N-ABZJ is usually 5 days.
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LPC47N217N-ABZJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPC47N217N-ABZJ 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 LPC47N217N-ABZJ?
For technical support, including LPC47N217N-ABZJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPC47N217N-ABZJ requirements.
6.How does Aetrix verify that LPC47N217N-ABZJ is sourced from the original manufacturer or authorized distributors?
All LPC47N217N-ABZJ 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 LPC47N217N-ABZJ meets industry standards.
7.What is the process for return or replacement of LPC47N217N-ABZJ?
All LPC47N217N-ABZJ units undergo pre-shipment inspection (PSI). If there is an issue with LPC47N217N-ABZJ, 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 LPC47N217N-ABZJ part is unused and in its original packaging.
Return procedure for LPC47N217N-ABZJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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