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Diodes Incorporated PI7C8152BMAE
- Part No.:
- PI7C8152BMAE
- Manufacturer:
- Diodes Incorporated
- Category:
- Specialized
- Package:
- 160-BQFP
- Datasheet:
-
PI7C8152BMAE.pdf
- Description:
- IC INTFACE SPECIALIZED 160MQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,549
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Product details
Overview
PI7C8152BMAE from Pericom Semiconductor is a 2-port PCI-to-PCI bridge IC supporting asynchronous 32-bit/66MHz or 33MHz operation on both primary and secondary buses, compliant with PCI Local Bus Spec 2.2 and PCI-to-PCI Bridge Architecture Spec 1.1, with dual 128-byte FIFOs for posted memory and delay transactions, and 3.3V core / mixed 3.3V–5V I/O interface - used in motherboard bus expansion and multi-device add-in cards.
For engineers reviewing the PI7C8152BMAE datasheet, PI7C8152BMAE pinout, PI7C8152BMAE application, or PI7C8152BMAE equivalent, key selection factors include asynchronous frequency support (25–66MHz per port), Intel 21152 compatibility, VGA palette snooping, ISA-aware legacy I/O decoding, and 160-pin MQFP thermal/mechanical fit.
Technical Context
The PI7C8152B implements full PCI-to-PCI bridge functionality with hardware-enforced transaction isolation between primary and secondary buses. It supports concurrent master-target operations on each bus and includes an internal 2-level programmable arbiter for up to four secondary bus masters.
Asynchronous mode-exclusive to the PI7C8152B variant-enables independent clock domains: primary and secondary ports operate at 25–66MHz each, decoupled via dual 128-byte FIFOs for posted writes and delayed transactions, eliminating synchronous skew constraints while maintaining PCI 2.2 coherency rules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bus Interface | PCI Local Bus Rev 2.2 compliant, 32-bit data path |
| Operating Frequency | 25–66MHz per port, asynchronous operation supported |
| FIFO Depth | Two 128-byte FIFOs: one for posted memory writes, one for delayed transactions |
| Voltage Support | 3.3V core logic; 3.3V/5V tolerant PCI I/O pins |
| Temperature Range | 0°C to +85°C extended commercial grade |
| Address Decoding | 32-bit I/O, 32-bit memory-mapped I/O, 64-bit prefetchable memory, VGA & ISA-aware modes |
Pinout & Package
Package: 160-pin MQFP (28mm × 28mm, 0.65mm pitch), lead-free compatible, thermally optimized for PCIe-adjacent board layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLKIN | Primary bus clock input | Accepts 25–66MHz reference clock; drives primary-side timing domain |
| CLKOUT | Secondary bus clock output | Provides buffered 25–66MHz clock to secondary bus devices; frequency may differ from CLKIN in async mode |
| AD[31:0] | Address/Data multiplexed bus | Time-multiplexed 32-bit address and data lines shared across both PCI interfaces |
| REQ# / GNT# | Arbitration request/grant | Supports internal 2-level priority arbiter for up to 4 secondary bus masters; disableable for external arbitration |
| INTA#–INTD# | Interrupt signaling | Four dedicated interrupt lines mapped to secondary bus devices; routed to primary bus per PCI INTx conventions |
Key Features
| Feature | Design Value |
|---|---|
| Asynchronous bus operation | Enables independent 25–66MHz clocking on primary and secondary buses without phase alignment, increasing system-level timing margin |
| VGA palette snooping | Hardware monitors VGA palette register writes on secondary bus and forwards updates to primary bus, enabling seamless video controller sharing |
| ISA-aware I/O decoding | Automatically maps first 64KB of I/O space to legacy ISA timing and protocol, simplifying integration with legacy peripherals |
| Intel 21152 compatibility | Pin- and register-level compatible with Intel's industry-standard bridge, enabling drop-in replacement in existing designs |
Applications
| Desktop Motherboard Expansion | Industrial Control Backplane |
|---|---|
Use Scenario: Adding extra PCI slots to a chipset-limited motherboard while preserving signal integrity and timing compliance. IC Role / Device Role / Timing Role: PCI bridge isolating secondary bus traffic, providing asynchronous clock domain translation and load buffering. Use Value: Enables two independent 66MHz PCI segments without requiring chipset redesign or violating PCI loading rules. | Use Scenario: Integrating multiple legacy I/O modules (e.g., serial, parallel, analog input) onto a single PCI add-in card for PLC or motion control systems. IC Role / Device Role / Timing Role: Bus translator and arbiter managing concurrent access from four secondary masters under ISA-aware I/O decoding. Use Value: Eliminates need for separate bridge chips per module, reducing BOM count and PCB area by consolidating into one 160-MQFP device. |
| Medical Imaging Add-In Card | Test & Measurement Instrumentation |
Use Scenario: Hosting high-bandwidth video decoder, frame grabber, and DMA controller on a single PCI add-in card for ultrasound or endoscopy systems. IC Role / Device Role / Timing Role: Posted write buffer coordinator and VGA palette snoop engine synchronizing display updates across primary and secondary buses. Use Value: Prevents display flicker during real-time image capture by ensuring palette consistency without CPU intervention. | Use Scenario: Connecting multiple synchronized data acquisition channels (ADCs, counters, DIO) to host PC via PCI, with deterministic latency and interrupt routing. IC Role / Device Role / Timing Role: Low-latency transaction router with dual 128-byte FIFOs absorbing burst transfers and decoupling bus timing jitter. Use Value: Maintains sub-1µs interrupt response time across varying bus loads, critical for time-critical trigger and capture sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PCI-to-PCI bridge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Intel 21152 | Synchronous-only operation; no asynchronous mode; identical pinout and register map | Lacks independent clock domain support; unsuitable where primary/secondary bus frequencies must differ | Select when design uses matched 33/66MHz clocks and requires maximum vendor validation history |
| PLX Technology PCI9050 | PCI-to-Local Bus bridge (not PCI-to-PCI); lacks secondary PCI interface and VGA snooping | Used for custom peripheral interfacing, not bus expansion; requires external logic for multi-device secondary bus | Select only for non-PCI secondary side (e.g., FPGA or ASIC interface), not for standard PCI slot replication |
Compared with Intel 21152, PI7C8152BMAE adds asynchronous clocking flexibility and retains full compatibility; versus PCI9050, it delivers native dual-PCI interoperability without glue logic, making it optimal for pure PCI bus replication and legacy I/O consolidation.
Availability
PI7C8152BMAE is available at Aetrix Electronics and suitable for desktop motherboard expansion, industrial backplane integration, medical imaging add-in cards, and test & measurement instrumentation requiring stable component supply and long-term lifecycle support.
Supply support for PI7C8152BMAE 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
Pericom Semiconductor was a fabless provider of high-speed interface and signal integrity solutions, acquired by Diodes Incorporated in 2016; known for PCI, USB, HDMI, and clock management ICs targeting computing and communications infrastructure.
The PI7C8152B belongs to Pericom's PCI bridge product line, designed specifically to extend PCI bus capacity in resource-constrained platforms while maintaining full specification compliance and backward compatibility with legacy systems.
FAQ
What is the maximum allowable frequency difference between primary and secondary buses?
The PI7C8152B supports fully independent clock domains: primary and secondary buses may operate anywhere from 25MHz to 66MHz each, with no minimum or maximum frequency delta required. The device uses asynchronous FIFOs to handle timing skew, so 25MHz/66MHz or 66MHz/33MHz pairings are valid and tested per datasheet timing tables.
Does PI7C8152BMAE support hot-plug or power management features?
Yes - it complies with PCI Power Management Specification 1.1 and ACPI Specification, supporting D0–D3 power states, PME# signaling, and configuration space power management registers. However, full hot-plug capability requires platform-level BIOS and OS driver support beyond the bridge's hardware implementation.
Can the internal arbiter be disabled to use an external PCI arbiter?
Yes - the internal 2-level priority arbiter for secondary bus masters is software-disablable via configuration register bit ARB_DIS (offset 0x44, bit 0). When disabled, REQ#/GNT# pins become passive, allowing connection to an external arbiter such as the PI7C7300 or discrete logic.
Is PI7C8152BMAE pin-compatible with PI7C8152AMA?
Yes - both share identical 160-pin MQFP packaging, pin assignment, and register layout. The only functional difference is asynchronous mode support (enabled only in PI7C8152B), which is controlled by configuration space bits and does not affect physical connectivity or power-up default behavior.
PI7C8152BMAE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 160-BQFP
- Packaging:
- Tray
- Product Status:
- Active
- Applications:
- PCI-to-PCI Bridge
- Interface:
- -
- Voltage - Supply:
- 3.3V
- Supplier Device Package:
- 160-MQFP (28x28)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
PI7C8152BMAE FAQ
1.How can I place an order for PI7C8152BMAE through Aetrix?
Please submit a Request for Quotation (RFQ) for PI7C8152BMAE 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 PI7C8152BMAE reliable?
The price and inventory of PI7C8152BMAE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI7C8152BMAE is usually 5 days.
3.What payment methods are accepted for PI7C8152BMAE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI7C8152BMAE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI7C8152BMAE?
PI7C8152BMAE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI7C8152BMAE 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 PI7C8152BMAE?
For technical support, including PI7C8152BMAE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI7C8152BMAE requirements.
6.How does Aetrix verify that PI7C8152BMAE is sourced from the original manufacturer or authorized distributors?
All PI7C8152BMAE 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 PI7C8152BMAE meets industry standards.
7.What is the process for return or replacement of PI7C8152BMAE?
All PI7C8152BMAE units undergo pre-shipment inspection (PSI). If there is an issue with PI7C8152BMAE, 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 PI7C8152BMAE part is unused and in its original packaging.
Return procedure for PI7C8152BMAE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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