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Microchip Technology ECE1099-FZG
- Part No.:
- ECE1099-FZG
- Manufacturer:
- Microchip Technology
- Category:
- Specialized
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
ECE1099-FZG.pdf
- Description:
- IC INTERFACE SPECIALIZED 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,039
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Product details
Overview
ECE1099-FZG from Microchip Technology is a 40-pin QFN 3.3V keyboard scan and GPIO expansion IC supporting a 23×8 matrix, interfacing via BC-Link or SMBus, with 32 multiplexed MCU-addressable I/O pins-used in notebook and embedded system keyboard controllers.
For engineers reviewing the ECE1099-FZG datasheet, ECE1099-FZG pinout, ECE1099-FZG application, or ECE1099-FZG equivalent, key selection criteria include BC-Link/SMBus dual-bus compatibility, 23×8 scan matrix capacity, 32 multiplexed GPIOs, 3.3V operation, and commercial-grade 0°C to 70°C temperature range.
Technical Context
The ECE1099-FZG implements a dedicated hardware scan engine for 23 row × 8 column keyboard matrices, offloading scanning logic from the host controller. Its KSI/KSO signals are fully multiplexed with GPIO functions, enabling flexible I/O allocation per system design.
It supports two distinct interconnect protocols: BC-Link (a proprietary low-latency embedded controller interface) and SMBus 2.0 (with selectable slave address), allowing integration into both legacy EC-based and modern SMBus-managed platforms without protocol translation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.3V nominal-requires single-rail LDO regulation; no level-shifting needed for 3.3V host systems. |
| Keyboard Matrix Size | 23×8-supports up to 184-key layouts with hardware-accelerated scan and debounce. |
| GPIO Count | 32 multiplexed pins-each individually configurable as KSI, KSO, or general-purpose I/O under MCU control. |
| Interface Options | BC-Link and SMBus-dual-mode operation enables drop-in replacement in either architecture without firmware redesign. |
| Package | 40-pin QFN, 6×6 mm body, 0.5 mm pitch-RoHS-compliant surface-mount package suitable for high-density laptop mainboards. |
| Temperature Range | Commercial (0°C to 70°C)-validated for non-extended thermal environments typical of consumer notebooks and industrial HMIs. |
Pinout & Package
40-pin QFN package, 6×6 mm body size, 0.5 mm pitch, RoHS-compliant. Pinout validated per Microchip DS00001728A Figures 1–2 and Package Outline documentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | 3.3V core and I/O supply; requires local 100nF + 4.7µF decoupling. |
| GND | Ground reference | Common return for all analog/digital circuits; tied to exposed thermal pad. |
| SCL / BC_CLK | Serial clock input | Shared pin: SMBus clock or BC-Link clock-mode selected by CONFIG pin state at power-up. |
| SDA / BC_DATA | Serial data bidirectional | Shared pin: SMBus data or BC-Link data-function determined by bus mode configuration. |
| KSI0–KSI22 | Keyboard scan inputs | 23 dedicated row-sense inputs; internally pulled up; support matrix scan initiation. |
| KSO0–KSO7 | Keyboard scan outputs | 8 column-drive outputs; open-drain with 20 mA sink capability per pin. |
| GPIO0–GPIO23 | General-purpose I/O | 24 additional MCU-addressable pins; configurable as input/output with programmable pull-ups. |
| CONFIG | Mode selection input | Hardwired high/low at power-up to select BC-Link (low) or SMBus (high) interface mode. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware keyboard scan engine | Offloads full 23×8 matrix scanning, debouncing, and key-state buffering from host CPU-reducing firmware overhead and latency. |
| Multiplexed KSI/KSO/GPIO resources | Enables dynamic reassignment of pins between keyboard scan and general I/O roles-maximizing pin utility in space-constrained designs. |
| Dual-bus interface support | Eliminates need for external protocol translators; allows reuse of same PCB layout across BC-Link and SMBus-based platform generations. |
| MCU-addressable I/O | All 32 GPIOs respond to register-level read/write commands over bus-enabling precise control without dedicated GPIO controllers. |
| Commercial temperature grade | Validated for reliable operation from 0°C to 70°C-aligned with standard notebook and industrial HMI thermal envelopes. |
Applications
| Thin Client Keyboard Interface | Notebook Embedded Controller Subsystem |
|---|---|
Use Scenario: Thin client terminal requiring compact, low-power keyboard scanning with minimal host CPU involvement. IC Role / Device Role / Timing Role: Dedicated keyboard scan expansion IC managing 23×8 matrix and reporting key events over SMBus to ARM-based host. Use Value: Reduces host firmware complexity and eliminates need for discrete scan logic or FPGA glue logic-cutting BOM cost and board area. | Use Scenario: Notebook motherboard where embedded controller (EC) handles keyboard/mouse but lacks native 23×8 scan capacity. IC Role / Device Role / Timing Role: BC-Link peripheral extending EC's keyboard interface with hardware-accelerated scan and interrupt-driven key reporting. Use Value: Enables support for full-size keyboards (e.g., 102-key layouts) without upgrading EC silicon-preserving existing firmware and validation effort. |
| Industrial HMI Keypad Expansion | POS Terminal Keypad Module |
Use Scenario: Ruggedized human-machine interface panel needing reliable keypad scanning in harsh factory environments. IC Role / Device Role / Timing Role: GPIO-expanding keyboard interface IC operating in SMBus mode, interfaced to Cortex-M4 application processor. Use Value: Provides deterministic 5ms max scan interval and built-in anti-ghosting-meeting industrial response-time requirements without real-time OS dependencies. | Use Scenario: Point-of-sale terminal integrating alphanumeric keypad with backlight control and status LEDs. IC Role / Device Role / Timing Role: Dual-function device acting as keyboard scanner (23×8) and GPIO expander (32 pins) for LED drivers and buzzer control. Use Value: Consolidates three discrete functions (scan IC, GPIO expander, LED driver interface) into one 6×6 mm QFN-reducing component count and assembly cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar keyboard scan and GPIO expansion applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMSC SCH3114 | Legacy 32-pin LQFP; supports only SMBus; no BC-Link; max 16×8 matrix. | Limited to smaller keypads; lacks multiplexed KSI/KSO flexibility; requires different footprint. | Select when BC-Link compatibility and >128-key support are unnecessary and LQFP assembly is preferred. |
| Microchip ECE1099X-FZG | Identical functionality and pinout; extended temperature range (0°C to 85°C); same 40-pin QFN package. | Required for operation in higher ambient environments (e.g., enclosed kiosks, automotive cabins). | Select ECE1099X-FZG only if extended temperature qualification is mandated-otherwise ECE1099-FZG offers full feature parity at lower cost. |
Compared with SMSC SCH3114, ECE1099-FZG delivers 44% more scan capacity and dual-bus flexibility in a smaller QFN package; versus ECE1099X-FZG, it trades extended temperature rating for commercial-grade cost optimization while retaining identical electrical and functional behavior.
Availability
ECE1099-FZG is available at Aetrix Electronics and suitable for notebook keyboard subsystems, thin client terminals, industrial HMI panels, and POS terminal keypad modules requiring stable component supply and long-term manufacturing continuity.
Supply support for ECE1099-FZG 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
Microchip Technology Inc. is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and interface ICs, with global design, manufacturing, and support infrastructure.
The ECE1099-FZG belongs to Microchip's embedded controller peripheral product line, designed specifically to extend keyboard scan and GPIO capabilities in resource-constrained host systems without increasing firmware complexity.
FAQ
What interface protocols does the ECE1099-FZG support?
The ECE1099-FZG supports two interface protocols: BC-Link (a proprietary low-latency embedded controller interconnect) and SMBus 2.0. Interface mode is selected at power-up via the CONFIG pin. Both protocols allow full register access, keyboard scan control, and GPIO configuration. The ECE1099-FZG does not support I²C, SPI, or UART interfaces.
Does the ECE1099-FZG require external pull-up resistors on its SMBus lines?
Yes, the ECE1099-FZG requires external pull-up resistors on SCL and SDA pins when operating in SMBus mode. Typical values are 2.2 kΩ to 3.3 kΩ to VDD (3.3V). No pull-ups are needed for BC-Link mode, as BC_CLK and BC_DATA use active-drive signaling per Microchip's BC-Link specification. The ECE1099-FZG itself does not integrate internal SMBus pull-ups.
Can KSI and KSO pins on the ECE1099-FZG be used as general-purpose I/Os?
No-KSI (keyboard scan input) and KSO (keyboard scan output) pins on the ECE1099-FZG are functionally fixed and cannot be reconfigured as general-purpose I/Os. However, the device provides 32 separate multiplexed GPIO pins (GPIO0–GPIO31), which are fully MCU-addressable and software-configurable as inputs or outputs. The ECE1099-FZG's GPIO count is independent of its dedicated KSI/KSO resources.
What is the maximum keyboard matrix size supported by the ECE1099-FZG?
The ECE1099-FZG supports a maximum keyboard matrix size of 23 rows × 8 columns (23×8), totaling 184 keys. This is implemented in hardware with dedicated scan logic, including automatic debouncing and ghosting prevention. The ECE1099-FZG does not support larger matrices (e.g., 24×8 or 32×8) or non-rectangular layouts-the 23×8 limit is fixed in silicon and cannot be extended via firmware.
Is the ECE1099-FZG pin-compatible with any other Microchip keyboard scan ICs?
No, the ECE1099-FZG is not pin-compatible with other Microchip keyboard scan ICs such as the ECE1098 or ECE1100 series. It uses a unique 40-pin QFN footprint with specific BC-Link/SMBus dual-mode pin assignments and KSI/KSO signal placement. Migration to alternate Microchip parts requires PCB redesign. The ECE1099-FZG's only pin-compatible variant is the extended-temperature ECE1099X-FZG.
ECE1099-FZG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Applications:
- GPIO Expansion Device
- Interface:
- -
- Voltage - Supply:
- 3.3V
- Supplier Device Package:
- 40-QFN (6x6)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
ECE1099-FZG FAQ
1.How can I place an order for ECE1099-FZG through Aetrix?
Please submit a Request for Quotation (RFQ) for ECE1099-FZG 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 ECE1099-FZG reliable?
The price and inventory of ECE1099-FZG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ECE1099-FZG is usually 5 days.
3.What payment methods are accepted for ECE1099-FZG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ECE1099-FZG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ECE1099-FZG?
ECE1099-FZG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ECE1099-FZG 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 ECE1099-FZG?
For technical support, including ECE1099-FZG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ECE1099-FZG requirements.
6.How does Aetrix verify that ECE1099-FZG is sourced from the original manufacturer or authorized distributors?
All ECE1099-FZG 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 ECE1099-FZG meets industry standards.
7.What is the process for return or replacement of ECE1099-FZG?
All ECE1099-FZG units undergo pre-shipment inspection (PSI). If there is an issue with ECE1099-FZG, 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 ECE1099-FZG part is unused and in its original packaging.
Return procedure for ECE1099-FZG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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