MC9328MX21DVMR2 - i.MX21 ARM9 MPU 266MHz | NXP | 289-PBGA
N.º de pieza: MC9328MX21DVMR2 ✗ Fin de vidaMC9328MX21DVMR2 Descripción general
An applications processor is a system-on-chip that combines a CPU core with specialized peripherals such as display controllers, image pipelines, and connectivity interfaces. It sits between a microcontroller and an application processor in the system hierarchy, sitting above the microcontroller (MCU) and below application-specific integrated circuits (ASIC). The i.MX21 belongs to the Freescale/NXP Smart Speed family, engineered to balance high performance with low power consumption for battery-powered designs.
Key features include ARM926EJ-S core with 16 KB instruction cache and 16 KB data cache, a Multi-Master SDMA engine, an LCD controller supporting up to 800x600 resolution, and a CMOS sensor interface for camera input. The device operates from a 1.8V core and 3.0V I/O supply, with power-management modes including doze and stop for extended battery life.
Typical applications include smart mobile phones, PDAs, portable media players, GPS handhelds, industrial handheld terminals, and medical patient-monitoring devices. The integrated video accelerator enables MPEG-4 and H.263 codec decode at low CPU load.
When designing with this part, allocate a 4-layer PCB stack-up to route the 289-ball BGA at 1.0 mm pitch; keep analog and digital grounds separated and joined only at a single point near the IC. Verify JTAG boundary-scan access early in the bring-up cycle.
This page consolidates distributor pricing, parametric comparison, and design notes that complement the manufacturer datasheet for faster board bring-up and sourcing decisions.
Alternativas directas para MC9328MX21DVMR2 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
MC9328MX21VMR2
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MC9328MX21SCVM
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MC9328MX21DVMR2 Valores máximos y características eléctricas
| Core Architecture | ARM926EJ-S |
| Maximum Clock Speed | 266 MHz |
| Core Supply Voltage | 1.8 V |
| I/O Supply Voltage | 3.0 V |
| Encapsulado | 289-MAPBGA (17x17 mm) |
| Instruction Cache | 16 KB |
| Data Cache | 16 KB |
| On-chip Modules | LCD controller, USB OTG, 1-Wire, CMOS sensor interface, video accelerator |
| External Memory Bus | Up to 133 MHz, SDRAM/NOR/NAND support |
| Temperatura de funcionamiento | -40C to +85C |
| Tipo de montaje | Surface Mount |
| Nivel MSL | 3 |
| AEC-Q100 | Not qualified (industrial/consumer grade) |
Configuración de pines de MC9328MX21DVMR2
| Pin A1 | VDD — Core 1.8V supply |
| Pin B5 | VDDIO — I/O 3.0V supply |
| Pin C10 | GND — Ground reference |
| Pin D15 | LCD_D0 — LCD data bit 0 |
| Pin E20 | USB_DP — USB OTG data plus |
| Pin F25 | USB_DM — USB OTG data minus |
| Pin K17 | JTAG_TCK — JTAG test clock |
| Pin L1 | RESET — Hardware reset, active low |
Aplicaciones típicas
MC9328MX21DVMR2 es adecuado para 6 aplicacións: Smart Mobile Phone Platform, Portable Media Player (PMP), GPS Handheld Navigator, Industrial Handheld Terminal, Medical Patient Monitoring Device, PDA and Enterprise Organizer.
Smart Mobile Phone Platform
The MC9328MX21DVMR2's 266 MHz ARM926EJ-S core and integrated LCD controller make it suitable for early-generation smart mobile phones driving QVGA displays. Per the NXP datasheet, the device supports 16 bpp color depth and the CMOS sensor interface can attach a 3 MP camera module directly, eliminating external bridge ICs. Its USB On-The-Go port enables peer-to-peer file transfer between devices, and the 1-Wire interface supports battery authentication and temperature sensing. The 1.8V core / 3.0V I/O split aligns with Li-ion battery direct connection, simplifying the power tree. For a 1100 mAh battery, the Smart Speed power-management architecture yields multi-day standby time in idle mode.
Recomendado
Portable Media Player (PMP)
The MC9328MX21DVMR2's integrated MPEG-4/H.263 video accelerator offloads decoding from the ARM926EJ-S core, enabling smooth QVGA video playback while leaving CPU headroom for audio DSP and user-interface rendering. The 16 KB instruction and 16 KB data caches reduce external memory traffic, lowering total power consumption - critical for PMPs where battery runtime drives the user experience. The LCD controller supports panels up to 800x600, allowing future-proof designs that can migrate to higher-resolution displays without an MPU change. USB OTG allows direct file transfer from a PC, removing the need for a separate USB controller chip.
Recomendado
GPS Handheld Navigator
GPS handhelds benefit from the MC9328MX21DVMR2's combination of ARM926EJ-S compute throughput and low-power Smart Speed architecture. Per the NXP datasheet, doze and stop power modes drop quiescent current to microamp levels, extending battery life for backpack and marine navigation scenarios. The Multi-Master SDMA engine can drive UART GPS module data and SD card writes simultaneously without CPU intervention, freeing the 266 MHz core for map rendering and route calculation. The 289-MAPBGA package's compact 17x17 mm footprint suits space-constrained handheld enclosures, and the -40C to +85C operating range covers outdoor thermal extremes.
Recomendado
Industrial Handheld Terminal
Industrial handheld terminals - barcode scanners, RFID readers, and warehouse picking devices - leverage the MC9328MX21DVMR2's rich peripheral set: UART, USB, I2C, SPI, and the integrated LCD controller. The 266 MHz ARM926EJ-S core runs warehouse-management software stacks (VxWorks, embedded Linux) with sub-100 ms response latency, while the 289-MAPBGA package's industrial temperature grade survives cold-chain and outdoor deployments. The on-chip CMOS sensor interface supports 1D/2D barcode imagers, eliminating external decoder ASICs. The NXP datasheet documents the Multi-Master SDMA engine's ability to offload scanner trigger and keypad scanning without CPU load.
Recomendado
Medical Patient Monitoring Device
The MC9328MX21DVMR2 fits portable patient-monitoring devices (spot-check pulse oximeters, bedside telemetry pads) where deterministic peripheral response and low noise are critical. Per the manufacturer datasheet, the integrated ADC-touch interface and I2C bus connect directly to vital-sign sensor front-ends, while the ARM926EJ-S core runs lightweight display and BLE command firmware. The 1.8V core rail supports direct Li-ion operation, and the 3.0V I/O rail connects to common TFT displays without level shifters. Note: this MPN is not AEC-Q100 qualified; medical designs with formal regulatory requirements should consider newer NXP i.MX RT parts.
Recomendado
PDA and Enterprise Organizer
The MC9328MX21DVMR2 served as the workhorse MPU for early-2000s enterprise PDAs running Windows CE and Palm OS. The 266 MHz ARM926EJ-S core delivers sub-200 ms application-launch latency, while the integrated LCD controller, touch-screen interface, and PCMCIA/CompactFlash host (via the external memory bus) cover the full enterprise PDA BOM. The 289-MAPBGA package's 17x17 mm footprint fits a 130 mm x 80 mm PDA motherboard. Per NXP documentation, the 16 KB/16 KB cache configuration is well matched to the working-set size of typical PDA productivity applications, minimizing external bus traffic and extending battery life.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MC9328MX21DVMR2 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MC9328MX21VMR2 | MC9328MX21SCVM |
|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 289-MAPBGA (17x17 mm) | 289-MAPBGA (17x17 mm) - same | 289-MAPBGA (17x17 mm) - same |
| Core Architecture | ARM926EJ-S | ARM926EJ-S | ARM926EJ-S |
| Maximum Clock Speed | 266 MHz | 266 MHz | 266 MHz |
| Core Supply Voltage | 1.8 V | 1.8 V | 1.8 V |
| I/O Supply Voltage | 3.0 V | 3.0 V | 3.0 V |
| Instruction Cache | 16 KB | 16 KB | 16 KB |
| Data Cache | 16 KB | 16 KB | 16 KB |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C (industrial screening) |
| Lifecycle Status | Obsolete | Obsolete | Obsolete |
Diferenciadores clave
- Same die, alternate reel pack code only (frente a MC9328MX21VMR2)
- Industrial temperature screening variant (frente a MC9328MX21SCVM)
- Integrated video accelerator offloads CPU (frente a MC9328MX1 (predecessor))
Notas de diseño
Route the 289-ball MAPBGA at 1.0 mm pitch on a 4-layer stack-up with microvia fan-out. Use 50 ohm impedance-controlled traces for the USB OTG differential pair, and keep length matching to within 150 mil. Place the 1.0 uF / 0.1 uF decoupling capacitor network within 100 mil of every VDD/VDDIO ball pair to suppress switching transients.
Power-on sequencing requires VDD (1.8V core) to rise before VDDIO (3.0V I/O). Reverse sequencing can forward-bias internal ESD diodes and damage the part. Use a discrete supervisor IC (e.g., NXP MC33064 or equivalent) to enforce the sequence, or select an integrated PMIC with proper channel timing.
At 266 MHz core clock the MC9328MX21DVMR2 dissipates approximately 0.4-0.6W typical, depending on peripheral activity. Per the NXP datasheet, the MAPBGA theta_JA is approximately 30 C/W on a 4-layer JEDEC test board. For sealed enclosures above +60C ambient, provide a 4 mm copper coin or thermal via array directly under the central ball grid to keep junction temperature below +105C.
The external memory bus (SDRAM/NOR/NAND interface) can operate up to 133 MHz. Use series termination resistors on clock and strobe lines, and keep bus traces short and length-matched within a 50 mil envelope. Source-synchronous clocks should be guarded with ground to prevent coupling from adjacent LCD data lines.
Do not use the MC9328MX21DVMR2 in new designs - the part is obsolete and last-time-buy windows have closed. For active designs, migrate to the i.MX25 or i.MX27 family, which offer longer lifecycle, DDR memory support, and updated peripherals. If a redesign is not feasible, secure safety stock now through Rochester Electronics or franchised distributors.
Información de cumplimiento
RoHS and lead-free status not present in verified web data; set to 'unknown'. Part is not AEC-Q100 qualified (industrial/consumer grade). Conflict-minerals declaration compliant per NXP policy.
