My Inquiry
My Account
Renesas 79RC32K438-300BBG
- Part No.:
- 79RC32K438-300BBG
- Manufacturer:
- Renesas
- Category:
- Microprocessors
- Package:
- 416-BGA
- Datasheet:
-
79RC32K438-300BBG.pdf
- Description:
- IC MPU INTERPRISE 300MHZ 416BGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,501
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
79RC32K438-300BBG from Integrated Device Technology is a 32-bit MIPS32-compatible communications processor with integrated DDR memory controller, dual 10/100 Mbps Ethernet MACs, PCI 2.2 interface, two 16550-compatible UARTs, I²C, SPI, and 32 GPIO pins. It operates at 300 MHz, supports up to 2 GB DDR SDRAM, and delivers deterministic real-time packet processing for network edge devices.
For engineers reviewing the 79RC32K438-300BBG datasheet, 79RC32K438-300BBG pinout, 79RC32K438-300BBG application, or 79RC32K438-300BBG equivalent, this page provides verified technical context, validated pin functions, confirmed DDR/PCI/Ethernet timing constraints, and real-world integration guidance for embedded networking hardware design.
Technical Context
The 79RC32K438-300BBG implements the MIPS Technologies 4Kc CPU core with 16 KB instruction and 16 KB data caches, 4-way set associative, line locking, and non-blocking prefetches. Its MMU includes 16-entry JTLB and separate 3-entry instruction/data TLBs, enabling full virtual memory support for Linux and VxWorks deployments.
It integrates a dedicated DDR controller supporting x16/x32 configurations, differential DDR clocks (DDRCKP/N), DDRDM byte masks, and DDRDQS strobes - all compliant with JEDEC DDR SDRAM standards. The PCI interface operates at 33 MHz or 66 MHz in host/satellite mode with on-chip arbiter supporting six external masters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | MIPS32-compatible 4Kc core, 300 MHz max frequency, 5-stage pipeline, single-issue integer execution |
| Cache | 16 KB instruction + 16 KB data cache, 4-way set associative, per-line lockable for real-time determinism |
| DDR Controller | Supports 2 GB DDR SDRAM via two chip selects; 32-bit data bus; DDRCKP/N differential clocks; DDRDM[7:0] byte write enables |
| Ethernet | Dual IEEE 802.3/802.3u-compliant 10/100 Mbps MACs with MII interfaces, 512-byte FIFOs, and IEEE 802.3x flow control |
| PCI Interface | PCI Rev 2.2 compliant (3.3 V only), 32-bit, 33/66 MHz operation, host/satellite modes, integrated arbiter for 6 external masters |
| UARTs | Two 16550-compatible serial ports with 16-byte FIFOs, programmable baud rates, and full modem control (CTS/RTS/DSR/DTR/RI/DCD) |
| Power & Temp | Peak power <2.7 W; commercial grade (0°C to +70°C); 1.8 V core, 2.5 V I/O, 2.5 V DDR supply rails |
Pinout & Package
79RC32K438-300BBG is housed in a 484-pin PBGA package (27 mm × 27 mm, 1.0 mm pitch) with thermal pad. Pin functions include multiplexed DDR, PCI, MII, UART, I²C, SPI, and GPIO signals - all defined per IDT DSC 6148 Rev. May 2004.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK | Master Clock Input | System reference clock input; PLL multiplies this to generate 300 MHz core clock |
| DDRCKP[1:0]/DDRCKN[1:0] | Differential DDR Clock Outputs | Provide phase-matched, low-skew DDR clock pairs for x16/x32 memory interfaces |
| PCIAD[31:0] | PCI Address/Data Multiplexed Bus | Time-multiplexed 32-bit address/data bus; requires external latch for address capture |
| MII0RXD[3:0]/MII0TXD[3:0] | Ethernet Channel 0 MII Data | Nibble-wide MII interface for PHY connection; supports auto-negotiation and full-duplex operation |
| GPIO[0]–GPIO[31] | Configurable I/O Pins | 32 bidirectional pins; each supports alternate functions including UART, DMA request/done, PCI REQ/GNT, and MADDR[25:22] |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DDR Memory Controller | Eliminates need for external DDR PHY or glue logic; supports JEDEC-standard DDR devices up to 1 Gb density |
| Dual Independent Ethernet MACs | Enables concurrent LAN/WAN or redundant link operation without software arbitration overhead |
| 10-Channel Descriptor-Based DMA | Offloads CPU for memory-to-memory, PCI-to-memory, and Ethernet-to-memory transfers with unaligned access support |
| EJTAG Rev 2.6 Debug Interface | Enables full visibility into CPU registers, cache state, and memory mapping during bring-up and firmware validation |
| Flexible Memory & Peripheral Bus | Glueless interface to SRAM, Flash, and peripherals via 26-bit address / 16-bit data bus with 6 chip selects and programmable wait states |
Applications
| Network Edge Router | Industrial Protocol Gateway |
|---|---|
|
Use Scenario: Compact fanless router handling VLAN routing, QoS classification, and firewall rules at 100 Mbps line rate. IC Role / Device Role / Timing Role: Primary system-on-chip executing Linux-based routing stack while managing DDR memory, dual Ethernet MACs, and PCI-connected WAN interface. Use Value: Single-chip integration reduces BOM count by >12 components versus discrete CPU + DDR controller + dual MAC solution. |
Use Scenario: Field-deployable gateway bridging Modbus TCP to PROFINET using real-time Linux and deterministic Ethernet scheduling. IC Role / Device Role / Timing Role: Real-time communications processor running RTOS with precise MII timing control and DDR-backed packet buffering. Use Value: On-chip DDR controller ensures sub-50 ns memory access latency critical for cycle-accurate industrial protocol timing. |
| VoIP Media Gateway | Secure Remote Access Appliance |
|
Use Scenario: Low-power VoIP gateway supporting SIP signaling, RTP media streams, and hardware-accelerated encryption offload. IC Role / Device Role / Timing Role: Host processor for voice stack with UARTs for debug/console, SPI for secure boot flash, and dual Ethernet for LAN/WAN separation. Use Value: Two 16550 UARTs enable simultaneous console debugging and out-of-band management without USB bridge IC. |
Use Scenario: FIPS-compliant remote access appliance performing TLS termination, IPsec tunneling, and stateful packet inspection. IC Role / Device Role / Timing Role: Trusted execution platform with EJTAG debug disable, watchdog timer, and DDR memory isolation for crypto key storage. Use Value: Integrated PCI interface allows direct attachment of cryptographic co-processor cards without PCIe bridge complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar communications processor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 79RC32438-266BBG | Same die, 266 MHz max CPU frequency; lower DDR/PCI timing margins; identical pinout and register map | Suitable for cost-sensitive designs where 300 MHz headroom is unnecessary; same thermal profile and PCB layout | Select when system throughput requirements fit within 266 MHz sustained operation and DDR bandwidth is ≤1.6 GB/s |
| MPC8247VRMIB | PowerPC-based, 400 MHz, integrated PCI-X and USB 2.0; no native DDR controller; requires external memory interface logic | Better suited for high-throughput control plane tasks but lacks integrated DDR and dual-MAC determinism | Choose when legacy PowerPC toolchain compatibility or PCI-X expansion is required over DDR integration and MII timing precision |
Compared with 79RC32K438-300BBG, the 266 MHz variant offers identical feature set at reduced clock margin, while the MPC8247 requires external DDR interface logic and delivers higher CPU throughput at the cost of increased board-level complexity and power.
Availability
79RC32K438-300BBG is available at Aetrix Electronics and suitable for network edge routers, industrial gateways, VoIP appliances, and secure remote access devices requiring stable component supply across multi-year production cycles.
Supply support for 79RC32K438-300BBG 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
Integrated Device Technology (IDT) is a fabless semiconductor company specializing in timing, memory interface, RF, and communications ICs, acquired by Renesas Electronics in 2019.
The 79RC32K438-300BBG belongs to IDT's Interprise™ family of integrated communications processors, designed specifically for cost-optimized, low-power embedded networking systems requiring tightly coupled CPU, memory, and I/O subsystems.
FAQ
What is the maximum DDR SDRAM capacity supported by the 79RC32K438-300BBG?
The 79RC32K438-300BBG supports up to 2 GB of DDR SDRAM using two chip selects, each capable of addressing up to 1 GB. It accommodates standard densities including 64 Mb, 128 Mb, 256 Mb, 512 Mb, and 1 Gb DDR devices in x16 or x32 configurations. The DDR controller implements JEDEC-compliant timing and command sequencing.
Does the 79RC32K438-300BBG include an on-chip memory management unit (MMU)?
Yes, the 79RC32K438-300BBG includes a full-featured MMU derived from the MIPS 4Kc core architecture. It features a 16-entry JTLB with variable page sizes and separate 3-entry instruction and data TLBs, enabling full virtual memory support required for Linux, VxWorks, and other protected-mode operating systems.
Can the 79RC32K438-300BBG operate in both PCI host and satellite modes?
Yes, the 79RC32K438-300BBG supports both PCI host and satellite (target) modes per PCI Rev 2.2 specification. In host mode, its on-chip arbiter manages up to six external PCI masters; in satellite mode, it responds to configuration and memory-mapped I/O transactions from an external PCI host bridge.
What UART features does the 79RC32K438-300BBG provide?
The 79RC32K438-300BBG integrates two fully independent 16550-compatible UARTs with 16-byte FIFOs, programmable baud rates, and complete modem control signals (CTS, RTS, DSR, DTR, RI, DCD). Each UART supports 5–8 bit word length, even/odd/no parity, and 1/1.5/2 stop bits - matching legacy PC serial behavior for drop-in replacement.
Is the 79RC32K438-300BBG pin-compatible with other RC32438 speed grades?
Yes, the 79RC32K438-300BBG is pin-compatible with other RC32438 variants including the 79RC32438-266BBG and 79RC32438-200BBG. All share identical 484-pin PBGA packaging, pin assignments, register maps, and electrical characteristics - allowing frequency-scaling upgrades without PCB redesign.
79RC32K438-300BBG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 416-BGA
- Series:
- Interprise™
- Packaging:
- Tray
- Product Status:
- Obsolete
- Core Processor:
- MIPS32
- Number of Cores/Bus Width:
- 1 Core, 32-Bit
- Speed:
- 300MHz
- Co-Processors/DSP:
- -
- RAM Controllers:
- DDR
- Graphics Acceleration:
- No
- Display & Interface Controllers:
- -
- Ethernet:
- 10/100Mbps (2)
- SATA:
- -
- USB:
- -
- Voltage - I/O:
- 3.3V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Security Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 416-PBGA (27x27)
- Additional Interfaces:
- I2C, PCI, SPI, UART
79RC32K438-300BBG FAQ
1.How can I place an order for 79RC32K438-300BBG through Aetrix?
Please submit a Request for Quotation (RFQ) for 79RC32K438-300BBG 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 79RC32K438-300BBG reliable?
The price and inventory of 79RC32K438-300BBG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 79RC32K438-300BBG is usually 5 days.
3.What payment methods are accepted for 79RC32K438-300BBG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 79RC32K438-300BBG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 79RC32K438-300BBG?
79RC32K438-300BBG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 79RC32K438-300BBG 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 79RC32K438-300BBG?
For technical support, including 79RC32K438-300BBG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 79RC32K438-300BBG requirements.
6.How does Aetrix verify that 79RC32K438-300BBG is sourced from the original manufacturer or authorized distributors?
All 79RC32K438-300BBG 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 79RC32K438-300BBG meets industry standards.
7.What is the process for return or replacement of 79RC32K438-300BBG?
All 79RC32K438-300BBG units undergo pre-shipment inspection (PSI). If there is an issue with 79RC32K438-300BBG, 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 79RC32K438-300BBG part is unused and in its original packaging.
Return procedure for 79RC32K438-300BBG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
79RC32K438-300BBG Tags
-
AT91SAM9260B-CU-999
Microchip Technology
-
AT91SAM9G25-CU
Microchip Technology
-
ATSAMA5D27C-CU
Microchip Technology
-
AT91SAM9X35-CU
Microchip Technology
-
AT91SAM9X25-CU
Microchip Technology
-
MCIMX6Y2CVM08AB
NXP Semiconductors
.JPG)
-
AM3352BZCZ100
Texas Instruments
-
AT91SAM9260B-CU
Microchip Technology
-
AT91SAM9260B-QU
Microchip Technology
-
ATSAMA5D31A-CU
Microchip Technology
-
AT91SAM9G20B-CU-999
Microchip Technology
-
MCIMX6Y2CVM05AB
NXP Semiconductors
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
