SPEAR320S-2 STMicroelectronics Integrated Circuit (BGA) In Stock
STMicroelectronics SPEAR320S-2 is an embedded MPU featuring an ARM926EJ-S core running at up to 33 MHz, with 32-bit architecture, integrated cache, and 24-bit address bus in a 289-pin BGA package. It supports a 16-bit external data bus with JTAG boundary scan for industrial and consumer embedded Linux systems. Available from authorized distributors with worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- BGA
- Pin Count
- 289
- Lifecycle
- OBSOLETE
- Datasheet
- SPEAR320S-2 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $29.1045(MOQ 6)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- ARM926EJ-S 32-bit MPU core at up to 33 MHz with integrated instruction and data cache for Linux-capable embedded systems
- 289-pin BGA package with 24-bit address bus and 16-bit external data bus for interfacing SDRAM and NOR flash
- JTAG boundary scan support enabling in-system debugging and board-level test without external probe adapters
- Fixed-point DSP-capable architecture suitable for industrial control and consumer multimedia processing pipelines
Applications
The SPEAR320S-2 is designed for industrial control panels, energy meters, and consumer set-top boxes that require an ARM926 Linux-capable processor at lower clock speeds to reduce power consumption and EMI. Its 16-bit external bus interface connects efficiently to SDRAM and NOR flash in cost-optimized embedded designs where 32-bit bus bandwidth is not required. The 289-pin BGA package and JTAG boundary scan make it suitable for compact multi-layer PCB designs that demand both high I/O density and in-circuit testability.
Specifications
| YTEOL | 0 |
| Address Bus Width | 24 |
| Bit Size | 32 |
| Boundary Scan | YES |
| Clock Frequency-Max | 33MHz |
| External Data Bus Width | 16 |
| Format | FIXED POINT |
| Integrated Cache | YES |
| JESD-30 Code | S-PBGA-B289 |
| JESD-609 Code | e2 |
| Low Power Mode | YES |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | BGA289,17X17,32 |
| Package Shape | SQUARE |
| Package Style | GRID ARRAY, LOW PROFILE, FINE PITCH |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Qualification Status | Not Qualified |
| Speed | 333MHz |
| Supply Current-Max | 400mA |
| Supply Voltage-Max | 1.3V |
| Supply Voltage-Min | 1.14V |
| Supply Voltage-Nom | 1.2V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Tin/Silver (Sn/Ag) |
| Terminal Form | BALL |
| Terminal Pitch | 0.8mm |
| Terminal Position | BOTTOM |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| uPs/uCs/Peripheral ICs Type | MICROPROCESSOR, RISC |
| Package | BGA |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | 5A992.C |
| HTS Code | 8542.31.00.25 |
| Country of Origin | Taiwan |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the maximum clock frequency of the SPEAR320S-2, and how does it compare to higher-speed ARM9 variants?
The SPEAR320S-2 operates at a maximum clock frequency of 33 MHz, which is significantly lower than the 400 MHz or 533 MHz variants in the SPEAr family. This conservative clock rate reduces dynamic power consumption and EMI, making it appropriate for battery-backed industrial meters and embedded control panels where CPU performance requirements are modest but thermal and power constraints are strict.
How does the 24-bit address bus on the SPEAR320S-2 affect external memory capacity in embedded Linux designs?
The 24-bit address bus supports up to 16 MB of directly addressable external memory space, which, combined with the 16-bit external data bus, allows cost-effective SDRAM and NOR flash configurations for embedded Linux kernels with a root filesystem. Designs requiring larger frame buffers or extended application storage can use an MMU-mapped external memory scheme to overcome the 16 MB physical window within the 32-bit virtual address space.
Why would an industrial designer choose the SPEAR320S-2 over a Cortex-A5 or Cortex-A7 based MPU?
The SPEAR320S-2 suits designs where proven ARM9 software ecosystems, lower unit cost, and minimal thermal management at 33 MHz outweigh the performance advantages of Cortex-A5 or Cortex-A7 devices running at 500 MHz or faster. Legacy industrial systems already qualified on ARM926 BSPs avoid re-validation costs by retaining the SPEAr320 platform, and the 289-pin BGA footprint fits existing PCB layouts without a board respin.
What package does the SPEAR320S-2 use, and how does that influence PCB design rules?
The SPEAR320S-2 uses a 289-pin plastic BGA package (S-PBGA-B289) with a square body, requiring a PCB with at least 4 routing layers to escape all ball signals using 0.1 mm to 0.15 mm trace widths and 0.2 mm via drill diameters. The BGA footprint demands controlled impedance routing for the 16-bit external data bus and proper decoupling capacitor placement within 1 mm of power balls to meet signal integrity requirements.
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About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 6+ | $33.5821 | $201.49 |
| 8+ | $32.4627 | $259.70 |
| 11+ | $29.1045 | $320.15 |
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