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Microchip Technology KBC1122P-AJZS
- Part No.:
- KBC1122P-AJZS
- Manufacturer:
- Microchip Technology
- Category:
- Specialized
- Package:
- 156-VFQFN Dual Rows, Exposed Pad
- Datasheet:
-
KBC1122P-AJZS.pdf
- Description:
- IC INTFACE SPECIALIZED 156DQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,978
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Product details
Overview
KBC1122P-AJZS from SMSC is a mobile Keyboard Controller (KBC) with integrated Super I/O, Shared Flash Interface (SFI), 8-channel ADC, 3-channel DAC, and SMSC SentinelAlert! functionality. It operates at 3.3V with 5V-tolerant buffers, supports ACPI 1.0b/2.0 and PC99a/PC2001, and delivers system power management via dual power planes and an embedded 8051 core running up to 32MHz - deployed in notebook and ultra-mobile PC platforms for BIOS/firmware coordination and thermal monitoring.
For engineers reviewing the KBC1122P-AJZS datasheet, KBC1122P-AJZS pinout, KBC1122P-AJZS application, or KBC1122P-AJZS equivalent, key selection considerations include LPC/FWH host flash interface compatibility, 156-pin DQFN RoHS package constraints, 8051-based firmware extensibility, SMSC SentinelAlert!-enabled analog monitoring, and PS/2/IR/SMBus peripheral integration without external glue logic.
Technical Context
The KBC1122P-AJZS implements a dual-power-plane architecture (VCC1/VCC0) enabling instant-on operation and low-standby-current sleep modes. Its embedded 8051 core executes firmware for keyboard scanning (up to 18×8 matrix), system watchdog, hibernation timer (0.5ms–128min), and IRCC/CIRCC protocol handling (NEC, RC5, RC6 under license).
LPC interface compliance includes Clock Run support, Serial IRQ, 15 direct IRQs, three 8-bit DMA channels, ACPI SCI, nSMI, and shadowed write-only registers. The SFI provides hardware-arbitrated 8MB shared FlashROM access with 8051-programmable protection and bank sizing, while FWH/LPC memory read/write supports up to 16MB addressing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | Embedded 8051 microcontroller with 2KB scratch ROM/RAM and 512B data RAM |
| LPC Interface | ACPI 1.0b/2.0 and PC99a/PC2001 compliant; supports Clock Run, Serial IRQ, and shadowed registers |
| ADC/DAC | 8-channel 8b/10b ADC (20ms full conversion); 3-channel 8b DAC with SMSC SentinelAlert! |
| Flash Interface | 8MB Shared FlashROM (SFI) + 16MB FWH/LPC memory addressing; 8051-programmable access protection |
| Package | 156-pin DQFN, lead-free, RoHS-compliant |
| Power Planes | Dual supply (VCC1/VCC0); standby current minimized; RESGEN monitors VCC1 for internal reset |
| IR Support | IRCC 2.0 (IrDA v1.2, HPSIR, ASKIR) + CIRCC 2.0 (NEC, RC5, RC6 licensed) |
Pinout & Package
Package: 156-pin DQFN (Dual Quad Flat No-lead), lead-free, RoHS-compliant, 12mm × 12mm body size, 0.4mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC1, VCC0 | Main & Standby Power Supplies | VCC1 powers core logic and resets via RESGEN; VCC0 supplies standby blocks including SMBus controllers and wake logic |
| LPC_CLK, LPC_RST#, LPC_FRAME# | LPC Bus Control Signals | Interface directly with chipset; supports Clock Run mode and ACPI-compliant reset sequencing |
| SFI_A[22:0], SFI_D[7:0] | Shared FlashROM Address/Data Bus | Hardware-arbitrated 8MB Flash access between host CPU and 8051; enables BIOS recovery and dual-firmware partitioning |
| ADC_IN[7:0] | Analog Input Channels | Direct connection to remote temperature sensors or voltage rails; sampled by 8-channel ADC with SMSC SentinelAlert! threshold detection |
| DAC_OUT[2:0] | Analog Output Channels | Drive thermal control actuators (e.g., fan speed reference, voltage margining) with 8-bit resolution and 1.5ms full conversion |
| HW_PROTECT# | Hardware Thermal Alert Output | Open-drain fail-safe output asserted automatically on overtemperature; requires no 8051 firmware intervention |
Key Features
| Feature | Design Value |
|---|---|
| SMSC SentinelAlert! Analog Monitoring | Enables autonomous thermal/voltage fault response via HW_PROTECT# and GPIOs - no host CPU or 8051 polling required |
| 8051-Programmable Flash Access Protection | Per-bank read/write/no-access control with variable bank sizes secures BIOS, EC firmware, and customer code partitions independently |
| RC6 Infrared Support (KBC1122P only) | Licensed Philips RC6 framing support enables universal remote compatibility in consumer notebooks and docking stations |
| Hibernation Timer with Sub-Millisecond Precision | Programmable wake-up interval from 0.5ms to 128 minutes allows fine-grained power state transitions for rapid resume |
| Three Independent PS/2 Ports with Edge Wake | Full PS/2 functionality during suspend; wake triggered by specific keyboard/mouse protocol sequences - reduces false triggers |
Applications
| Notebook System BIOS Coordination | Thermal Management in Ultra-Mobile PCs |
|---|---|
Use Scenario: Host CPU and 8051 coordinate BIOS updates, recovery boot paths, and secure firmware execution using shared FlashROM. IC Role / Device Role / Timing Role: KBC1122P-AJZS acts as firmware hub arbiter and BIOS co-processor, managing SFI arbitration and FWH ID handshaking. Use Value: Enables dual-firmware partitioning and host-initiated flash recovery without dedicated SPI controller or external memory mapping logic. | Use Scenario: Real-time temperature sensing across CPU, GPU, and battery using external thermistors connected to ADC_IN[7:0]. IC Role / Device Role / Timing Role: KBC1122P-AJZS serves as analog monitoring engine with autonomous HW_PROTECT# assertion on thermal violation. Use Value: Eliminates need for separate thermal monitor IC and reduces BOM count while ensuring fail-safe shutdown within <100μs. |
| Consumer IR Remote Integration | Legacy Peripheral Emulation in Modern Platforms |
Use Scenario: NEC/RC5/RC6 infrared signals from universal remotes decoded and routed to OS via CIRCC2.0 for media control. IC Role / Device Role / Timing Role: KBC1122P-AJZS functions as licensed CIR controller with 8051-driven frame parsing and wake-on-RC5/NEC capability. Use Value: Supports OEM-branded remote functionality in thin-and-light notebooks without adding discrete IR receiver ICs or licensing overhead. | Use Scenario: PS/2 keyboard/mouse emulation and 16550A UART bridging for legacy peripherals in systems lacking native support. IC Role / Device Role / Timing Role: KBC1122P-AJZS provides three hardware PS/2 ports and 8051-driven 16550A UART with 16-byte FIFOs. Use Value: Maintains backward compatibility with industrial keyboards, barcode scanners, and serial diagnostic tools without PCIe-to-PS/2 bridge ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar keyboard/system controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ITE IT8786E | Single 3.3V supply; no dual power planes; lacks SFI and licensed RC6 support; 128-pin QFP package | Targeted at desktop motherboards with simpler power management; no hibernation timer or fail-safe HW_PROTECT# | Choose IT8786E when SFI, RC6, or autonomous thermal protection are not required and QFP layout is preferred. |
| Nuvoton NCT6776D | No integrated 8051; relies on host CPU for firmware execution; supports SMBus-only sensor interface; 128-pin LQFP | Designed for cost-sensitive desktops and entry-level laptops; no IRCC/CIRCC or PS/2 edge-wake capability | Choose NCT6776D when external firmware hosting is acceptable and advanced IR/PS/2 wake features are unnecessary. |
Compared with IT8786E and NCT6776D, the KBC1122P-AJZS uniquely integrates licensed RC6 decoding, hardware-protected thermal response, and 8MB SFI arbitration - making it essential for ultra-mobile platforms requiring BIOS recovery resilience, rapid resume, and universal remote support without added ICs.
Availability
KBC1122P-AJZS is available at Aetrix Electronics and suitable for notebook platform design, ultra-mobile PC thermal management, and consumer IR-enabled device development requiring stable component supply and long-term lifecycle support.
Supply support for KBC1122P-AJZS 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
Standard Microsystems Corporation (SMSC) was a fabless semiconductor company specializing in connectivity, embedded control, and system management ICs before its acquisition by Microchip Technology in 2012.
The KBC1122P-AJZS belongs to SMSC's Mobile Keyboard Controller product line, engineered specifically for power-constrained portable platforms requiring integrated firmware hub, analog monitoring, and multi-protocol IR/PS/2 peripheral control.
FAQ
What is the primary function of the KBC1122P-AJZS in a notebook platform?
The KBC1122P-AJZS serves as a mobile Keyboard/System Management Controller integrating an 8051 core, LPC interface, Super I/O resources, and SMSC SentinelAlert! analog monitoring. It coordinates BIOS/firmware execution via Shared FlashROM, manages thermal events autonomously through HW_PROTECT#, and handles PS/2, IR, and SMBus peripherals - all within a single 156-pin DQFN package. Its dual power planes enable instant-on behavior critical for ultra-mobile designs.
Does the KBC1122P-AJZS support RC6 infrared protocol, and how is it implemented?
Yes, the KBC1122P-AJZS supports RC6 infrared protocol under Philips license - a feature exclusive to the "P" variant (KBC1122P-AJZS). It is implemented in the CIRCC2.0 block, allowing 8051 firmware to decode RC6 frames, trigger wake events on specific commands, and route data to the host via mailbox registers. This enables universal remote control in consumer notebooks without external IR decoders.
How does the KBC1122P-AJZS handle power management during system suspend?
The KBC1122P-AJZS uses dual power planes (VCC1/VCC0) to maintain critical functions during suspend. Standby-powered blocks - including SMBus controllers, wake logic, and RTC resources - remain active on VCC0, while main logic shuts down. Its hibernation timer supports programmable wake intervals from 0.5ms to 128 minutes, and PS/2/IR wake events are processed autonomously without host CPU involvement - reducing resume latency and power leakage.
What distinguishes the KBC1122P-AJZS from the non-P variant KBC1122-AJZS?
The KBC1122P-AJZS adds licensed RC6 infrared protocol support in its CIRCC2.0 block, which is absent in the base KBC1122-AJZS. Both share identical pinout, package (156-pin DQFN), LPC/SFI/ADC/DAC functionality, and 8051 firmware architecture. The "P" suffix denotes this specific feature enhancement - confirmed in SMSC documentation as exclusive to KBC1122P-AJZS - with no differences in timing, voltage, or thermal specs.
Can the KBC1122P-AJZS be used as a standalone embedded controller without host CPU interaction?
Yes, the KBC1122P-AJZS can operate autonomously using its embedded 8051 core, which executes firmware stored in internal scratch RAM or external Flash via SFI. It supports IDLE/SLEEP modes, watchdog timer, hibernation timer, and hardware-triggered responses (e.g., HW_PROTECT# assertion) independent of host CPU. However, full system integration - such as BIOS update coordination or IRQ routing - requires LPC bus interaction with the host chipset.
KBC1122P-AJZS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 156-VFQFN Dual Rows, Exposed Pad
- Packaging:
- Tray
- Product Status:
- Obsolete
- Applications:
- -
- Interface:
- LPC
- Voltage - Supply:
- -
- Supplier Device Package:
- 156-DQFN (12x12)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
KBC1122P-AJZS FAQ
1.How can I place an order for KBC1122P-AJZS through Aetrix?
Please submit a Request for Quotation (RFQ) for KBC1122P-AJZS 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 KBC1122P-AJZS reliable?
The price and inventory of KBC1122P-AJZS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KBC1122P-AJZS is usually 5 days.
3.What payment methods are accepted for KBC1122P-AJZS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KBC1122P-AJZS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KBC1122P-AJZS?
KBC1122P-AJZS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KBC1122P-AJZS 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 KBC1122P-AJZS?
For technical support, including KBC1122P-AJZS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KBC1122P-AJZS requirements.
6.How does Aetrix verify that KBC1122P-AJZS is sourced from the original manufacturer or authorized distributors?
All KBC1122P-AJZS 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 KBC1122P-AJZS meets industry standards.
7.What is the process for return or replacement of KBC1122P-AJZS?
All KBC1122P-AJZS units undergo pre-shipment inspection (PSI). If there is an issue with KBC1122P-AJZS, 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 KBC1122P-AJZS part is unused and in its original packaging.
Return procedure for KBC1122P-AJZS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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