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NXP Semiconductors PCA9504ADGG,112
- Part No.:
- PCA9504ADGG,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Specialized
- Package:
- 56-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
PCA9504ADGG,112.pdf
- Description:
- IC INTERFACE SPECIALIZED 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,197
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Product details
Overview
PCA9504ADGG,112 from NXP Semiconductors (formerly Philips Semiconductors) is a highly integrated motherboard "glue chip" ASIC designed for Intel 8xx-series chipset platforms. It provides dual strapping-selectable logic modes, 5 V/3.3 V voltage translation for DDC and VGA sync signals, IDE/PCI reset buffering, power sequencing (BACKFEED_CUT, PWRGD_3V), and HD/LED drive - all in a single 56-pin TSSOP package.
For engineers reviewing the PCA9504ADGG,112 datasheet, PCA9504ADGG,112 pinout, PCA9504ADGG,112 application, or PCA9504ADGG,112 equivalent, this device is critical for legacy PC motherboard design involving Intel ICH2-based platforms, power-good signal generation, VGA DDC level-shifting, and SLP_S3/S5 state coordination.
Technical Context
The PCA9504ADGG,112 implements configurable logic paths via its STRAP pin (pin 54), enabling either FLUSH mode (for CPU flush/init timing control) or GP mode (for generic gate input/output routing). Its analog reference circuitry (VCCP_VREF) dynamically adjusts input thresholds based on selected mode - 0.95–1.1 V in FLUSH mode, 1.95–2.1 V in GP mode - ensuring robust signal interpretation across varying noise margins.
It integrates bidirectional 3.3 V ↔ 5 V I²C/SMBus DDC translation (3V_DDCSCL/SDA ↔ 5V_DDCSCL/SDA) with open-drain compatibility up to 400 kHz, and supports precise power sequencing: PWRGD_PS → PWRGD_3V propagation delay (4.5–11.0 ns), LATCHED_BACKFEED_CUT activation synchronized to SLP_S5 transitions, and RSMRST generation with 32 ms nominal delay from V_5P0_STBY rise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp | 0 °C to +70 °C - validated for commercial desktop/server motherboard environments |
| Supply Voltages | Separate 3.3 V standby (V_3P3_STBY) and 5 V standby (V_5P0_STBY) rails required - enables independent power well management |
| I/O Voltage Translation | 3.3 V ↔ 5 V bidirectional DDC translation (SCL/SDA) - meets VESA DDC2B timing and voltage requirements for VGA monitor handshaking |
| Output Drive Strength | HD_LED drives 24 mA sink; IDE_RSTDRV sources/sinks ±6 mA - sufficient for direct connection to HDD activity LEDs and IDE reset lines |
| Propagation Delay | PWRGD_PS → PWRGD_3V: 4.5–11.0 ns - ensures tight synchronization between main PSU and 3.3 V rail power-good assertion |
| ESD Protection | ≥1000 V HBM (JESD22-A114), ≥750 V CDM (JESD22-C101) - meets motherboard-level ESD immunity requirements |
| Latch-up Immunity | Exceeds JEDEC JESD78 (≥100 mA) - guarantees robustness against transient current faults in multi-rail systems |
Pinout & Package
Package: 56-pin TSSOP (SOT364-1), 0.5 mm pitch, body size 14.0 × 6.1 mm - optimized for high-density ATX/mATX motherboard layouts near I/O controller hub (ICH2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VREF3IN) | 3.3 V reference input | Provides stable 3.3 V reference for internal analog comparators and threshold generation |
| 2 (V_5P0_STBY) | 5 V standby supply | Primary power source for 5 V output drivers (HD_LED, IDE_RSTDRV, HSYNC_5V) and standby logic |
| 4 (GPO_FLUSH_CACHE/GP2_IN) | Strappable input | In FLUSH mode: GPO from ICH2; in GP mode: generic logic gate input B |
| 7 (FLUSH_OUT_CPU/GP1_OUT) | Strappable open-drain output | In FLUSH mode: routed to CPU FLUSH#; in GP mode: NAND1 output |
| 17–20 (3V/5V_DDCSCL/SDA) | Bidirectional DDC I/O | Level-translates SMBus signals between 3.3 V ICH2 and 5 V VGA monitor without external components |
| 34 (PWRGD_3V) | 3.3 V power-good output | Asserted after PWRGD_PS with ≤11 ns delay - used to enable 3.3 V domain logic and memory |
| 41 (TEST_EN) | Test enable input | Internal 100 kΩ pull-down - enables boundary-scan and functional test modes during manufacturing |
| 54 (STRAP) | Mode selection | Internally pulled up to default FLUSH mode; grounding selects GP mode for general-purpose logic reconfiguration |
Key Features
| Feature | Design Value |
|---|---|
| Dual strapping-selectable logic modes | Single hardware configuration (STRAP pin) switches between FLUSH timing control and GP gate routing - eliminates need for multiple BOM variants |
| VGA DDC & sync level translation | Integrated 3.3 V ↔ 5 V translation for DDCSCL/SDA, HSYNC_3V/5V, VSYNC_3V/5V - removes four discrete level-shifters from motherboard BOM |
| Power sequencing with latching | LATCHED_BACKFEED_CUT output remains asserted until SLP_S5 deassertion - prevents backfeed during suspend/resume transitions |
| 5 V reference generation | REF5V and REF5V_STBY outputs auto-select dominant supply (VREF5IN or VREF3IN; V_5P0_STBY or V_3P3_STBY) - ensures stable reference under asymmetric power-up sequences |
| IDE/PCI reset buffering | PCIRST_IN → PCIRST_OUT (3.3 V, +3 mA) and IDE_RSTDRV (5 V, ±6 mA) - isolates chipset reset signals from load variations and noise |
| Hard drive LED driver | HD_LED sinks 24 mA with 0.4 V VOL - directly drives standard front-panel LEDs without external transistor or current-limiting resistor |
Applications
| Intel 8xx Chipset Motherboard Power Sequencing | VGA Monitor DDC Handshaking Interface |
|---|---|
Use Scenario: Coordinating power-up sequence across 5 V, 3.3 V, and standby rails on Intel 820/845/850-based motherboards. IC Role / Device Role / Timing Role: Generates PWRGD_3V from PWRGD_PS, asserts BACKFEED_CUT after SLP_S3, and latches BACKFEED_CUT state via SLP_S5 edge detection. Use Value: Eliminates discrete RC timing networks and comparator circuits - reduces component count by ≥7 parts while improving timing repeatability across temperature. | Use Scenario: Enabling EDID readout and display resolution negotiation between ICH2 (3.3 V) and VGA monitor (5 V DDC bus). IC Role / Device Role / Timing Role: Translates bidirectional 3.3 V ↔ 5 V DDCSCL/SDA signals with <5 ns propagation delay and open-drain compatibility. Use Value: Guarantees VESA DDC2B compliance without external FETs or resistors - cuts BOM cost and PCB area by ~12 mm² per interface. |
| Legacy PC Audio Subsystem Control | Front-Panel LED & Reset Signal Management |
Use Scenario: Managing audio codec shutdown and mute behavior during S3/S5 sleep transitions on entry servers and workstations. IC Role / Device Role / Timing Role: Converts AUD_EN and MUTE_AUD inputs into timed AUD_RST and AUD_SHDN outputs with sub-6 ns propagation. Use Value: Prevents audio pop/click during resume by synchronizing reset release to power rail stabilization - replaces discrete logic + RC delays. | Use Scenario: Driving front-panel HD, power, and activity LEDs while buffering FPRST and IDE/SCSI drive active signals. IC Role / Device Role / Timing Role: HD_LED sinks 24 mA; GRN_LED/YLW_LED sink 24 mA; PRIMARY_HD/SECONDARY_HD/SCSI inputs buffer drive strength and add hysteresis. Use Value: Supports direct LED connection with no external components - reduces assembly steps and improves reliability vs. discrete transistor solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar motherboard glue logic applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCA9505ADGG,112 | Enhanced version with additional GPIOs and updated I²C timing; same pinout and core functionality | Supports newer Intel 9xx-series platforms requiring extended strap options and higher DDC clock tolerance | Select when upgrading from 8xx to 9xx chipset designs or requiring >4 GP I/Os |
| PI7C9X110BQFEX | Dedicated PCI Express-to-PCI bridge with integrated power management logic; not pin-compatible, different architecture | Targets PCIe-based embedded systems replacing legacy PCI; lacks VGA DDC translation and IDE reset functions | Choose only for PCIe migration paths - requires full schematic redesign and firmware adaptation |
Compared with PCA9505ADGG,112, the PCA9504ADGG,112 offers identical pinout and core glue functions but fewer GPIOs and no support for 100 kHz+ DDC clocks; versus PI7C9X110BQFEX, it delivers targeted legacy platform integration at lower cost and zero FPGA/PCIe stack dependency.
Availability
PCA9504ADGG,112 is available at Aetrix Electronics and suitable for Intel 8xx chipset motherboard production, legacy server refurbishment, and industrial PC repair requiring stable component supply and long-term lifecycle support.
Supply support for PCA9504ADGG,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 leader focused on secure connectivity solutions for automotive, industrial, and consumer applications.
The PCA9504ADGG,112 belongs to NXP's legacy PC platform support product line, engineered specifically to consolidate discrete logic on Intel 8xx-series motherboard designs - reducing bill-of-materials cost and improving signal integrity in space-constrained layouts.
FAQ
What is the primary function of the PCA9504ADGG,112 in a motherboard design?
The PCA9504ADGG,112 serves as a dedicated "glue chip" for Intel 8xx-series chipset platforms, integrating power sequencing (PWRGD_3V, BACKFEED_CUT), VGA DDC level translation, IDE/PCI reset buffering, and front-panel LED driving. Its core purpose is to replace multiple discrete logic ICs and passive components - reducing BOM count, PCB area, and design complexity while ensuring timing-critical signal coordination across 3.3 V and 5 V domains. The PCA9504ADGG,112 is essential for achieving functional compliance with Intel ICH2-based reference designs.
How does the STRAP pin (pin 54) affect the operation of the PCA9504ADGG,112?
The STRAP pin determines whether the PCA9504ADGG,112 operates in FLUSH mode (default, internally pulled up) or GP (General Purpose) mode (grounded). In FLUSH mode, pins 4–8 implement CPU flush/init timing logic with dynamic VCCP_VREF thresholds (0.95–1.1 V); in GP mode, those same pins become configurable logic gates (GP1/GP2 inputs/outputs) with higher thresholds (1.95–2.1 V). This dual-mode capability allows one silicon design to serve two distinct motherboard architectures without mask changes. The PCA9504ADGG,112's behavior is fully determined by this single hardware strap - no firmware or register writes are involved.
Can the PCA9504ADGG,112 be used in new designs today, given its legacy status?
Yes - the PCA9504ADGG,112 remains actively supported for repair, refurbishment, and continuity manufacturing of Intel 8xx-based systems including industrial PCs, medical imaging workstations, and legacy server platforms. NXP maintains qualified sources and extended lifecycle documentation, and Aetrix Electronics provides traceable, tested inventory with full lot traceability. While not intended for green-field PCIe-based designs, the PCA9504ADGG,112 delivers guaranteed form-fit-function replacement for existing assemblies where obsolescence risk must be mitigated. Its proven reliability over 20+ years of field use further validates its suitability for long-lifecycle deployments.
What are the key electrical differences between the 3.3 V and 5 V I/O sections of the PCA9504ADGG,112?
The PCA9504ADGG,112 maintains strict voltage-domain separation: 3.3 V I/Os (e.g., CPU_PRESENT, SLP_S3, 3V_DDCSCL) tolerate inputs up to V_3P3_STBY + 0.5 V and drive outputs to 3.3 V levels with ±3 mA drive strength; 5 V I/Os (e.g., HD_LED, IDE_RSTDRV, 5V_DDCSCL) tolerate inputs up to V_5P0_STBY + 0.5 V and drive outputs to 5 V levels with ±6 mA drive strength. Input hysteresis ranges from 250 mV (CLK_IN) to 400 mV (SLP_S3, FPRST), and all open-drain outputs (e.g., FLUSH_OUT_CPU, PS_ON) specify VOL ≤ 0.4 V at IOL = 6–12 mA. These parameters ensure interoperability with both ICH2 (3.3 V) and legacy peripherals (5 V) without level-shifting components. The PCA9504ADGG,112's dual-supply architecture enforces this isolation at the silicon level.
Does the PCA9504ADGG,112 support modern display interfaces like HDMI or DisplayPort?
No - the PCA9504ADGG,112 was designed exclusively for VGA monitor interfaces and supports only DDC2B (I²C-based) communication and HSYNC/VSYNC level translation between 3.3 V chipset logic and 5 V VGA monitors. It does not include HDMI, DisplayPort, LVDS, or eDP transceivers, nor does it support HDCP, EDID extensions beyond 128 bytes, or high-speed serial link protocols. Its video-related functionality is strictly limited to analog VGA timing and DDC handshaking. For modern display interfaces, system designers must use dedicated SerDes ICs or GPU-integrated controllers. The PCA9504ADGG,112 remains relevant only in VGA-dependent legacy systems.
PCA9504ADGG,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 56-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- PC's, PDA's
- Interface:
- I2C
- Voltage - Supply:
- 3V ~ 5.25V
- Supplier Device Package:
- 56-TSSOP
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
PCA9504ADGG,112 FAQ
1.How can I place an order for PCA9504ADGG,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCA9504ADGG,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 PCA9504ADGG,112 reliable?
The price and inventory of PCA9504ADGG,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCA9504ADGG,112 is usually 5 days.
3.What payment methods are accepted for PCA9504ADGG,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCA9504ADGG,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCA9504ADGG,112?
PCA9504ADGG,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCA9504ADGG,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 PCA9504ADGG,112?
For technical support, including PCA9504ADGG,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCA9504ADGG,112 requirements.
6.How does Aetrix verify that PCA9504ADGG,112 is sourced from the original manufacturer or authorized distributors?
All PCA9504ADGG,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 PCA9504ADGG,112 meets industry standards.
7.What is the process for return or replacement of PCA9504ADGG,112?
All PCA9504ADGG,112 units undergo pre-shipment inspection (PSI). If there is an issue with PCA9504ADGG,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 PCA9504ADGG,112 part is unused and in its original packaging.
Return procedure for PCA9504ADGG,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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