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Renesas IDT79RC64V474-180DZ
- Part No.:
- IDT79RC64V474-180DZ
- Manufacturer:
- Renesas
- Category:
- Microprocessors
- Package:
- 128-BQFP Exposed Pad
- Datasheet:
-
IDT79RC64V474-180DZ.pdf
- Description:
- IC MPU 180MHZ 128QFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,509
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Product details
Overview
IDT79RC64V474-180DZ from Integrated Device Technology (IDT) is a 64-bit RISCore4000-based embedded microprocessor operating at 180 MHz, featuring 16KB instruction and 16KB data caches, 32-bit external bus interface, and MIPS-III ISA compliance. It delivers 237 Dhrystone MIPS and 94 MFLOPS, supports industrial temperature range (−40°C to +85°C), and targets internetworking equipment and Windows® CE–based systems.
For engineers reviewing the IDT79RC64V474-180DZ datasheet, IDT79RC64V474-180DZ pinout, IDT79RC64V474-180DZ application, or IDT79RC64V474-180DZ equivalent, key selection considerations include its 128-pin QFP package, 3.3V core/I/O, JTAG boundary-scan support, RC4640-compatible pinout, and SyncDRAM timing protocol implementation.
Technical Context
The IDT79RC64V474-180DZ implements a streamlined 5-stage scalar pipeline with minimized branch and load delays, and integrates a fully autonomous floating-point unit supporting IEEE 754 single/double precision arithmetic. Its on-chip system control coprocessor (CP0) manages virtual-to-physical address translation via a 96-entry fully associative TLB.
It features two-way set-associative caches with per-set locking capability, a programmable write-address-to-write-data delay (0–7 MasterClock cycles), and boot-time configurable bus width (32-bit only), clock multiplier (×2 to ×8), and endianness. The device uses a 3.3V supply with quiet PLL power rails (VCCP/VSSP) and supports WAIT instruction–driven standby mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Clock Frequency | 180 MHz pipeline clock; derived from 22.5–90 MHz MasterClock via on-chip PLL (×2 to ×8) |
| Performance | 237 Dhrystone MIPS and 94 MFLOPS - measured at 180 MHz, enabling real-time packet processing in routers/switches |
| Cache | 16KB I-cache and 16KB D-cache, both two-way set-associative with per-set locking for deterministic real-time code/data retention |
| Bus Interface | 32-bit multiplexed SysAD(31:0) with 4-bit parity (SysADC[3:0]), compatible with RC4640 and supporting pipelined/write-reissue protocols |
| Package & Temp | 128-pin QFP; industrial temperature range (−40°C to +85°C case temperature), drop-in heat spreader included |
| Power & I/O | 3.3V core and I/O; separate quiet VCCP/VSSP rails for PLL stability; JTAG boundary scan (TDI/TDO/TCK/TMS/TRST*/JTAG32*) enabled |
| ISA & MMU | MIPS-III Instruction Set Architecture; flexible RC4700-compatible MMU with 96-entry TLB supporting 4KB–16MB page sizes |
Pinout & Package
Package: 128-pin Plastic Quad Flat Package (QFP), surface-mount, with integrated drop-in heat spreader. Pin pitch: 0.65 mm. Body size: 20.0 mm × 20.0 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SysAD(31:0) | 32-bit multiplexed address/data bus | Carries addresses during phase 1, data during phase 2; protected by SysADC[3:0] parity bits |
| SysCmd(8:0) | System command/data identifier bus | Encodes read/write, cache/non-cache, block/non-block, and data width operations |
| RdRdy*, WrRdy* | Asynchronous handshake inputs | Allow memory subsystem to throttle processor transfers without stalling pipeline |
| ExtRqst*, Release* | External bus arbitration signals | Enable DMA masters to gain exclusive access to SysAD/SysCmd buses |
| Int*(5:0), NMI* | Interrupt request inputs | Support six maskable interrupts plus one non-maskable interrupt for critical fault handling |
| ModeClock, ModeIn | Serial boot configuration interface | Low-frequency (MasterClock/256) serial stream sets bus width, clock multiplier, endianness, and write protocol at power-on |
| TDI, TDO, TCK, TMS, TRST*, JTAG32* | JTAG boundary-scan interface | Enables IEEE 1149.1-compliant board-level test; JTAG32* selects 32-bit scan chain for SysAD(31:0) only |
Key Features
| Feature | Design Value |
|---|---|
| RC4640 pin compatibility | 100% socket- and signal-compatible with RC4640 - enables drop-in upgrade path for existing 32-bit designs |
| SyncDRAM timing support | Programmable write-address-to-write-data delay (0–7 MasterClock cycles) simplifies SDRAM interface without external logic |
| Cache locking | Per-set locking of 8KB I-cache or D-cache blocks ensures deterministic latency for real-time ISR and control code |
| Power-managed standby | WAIT instruction halts pipeline clocks while preserving register state and enabling wake-on-interrupt - reduces active power by >70% |
| Industrial-grade thermal design | Drop-in heat spreader and validated ∅CA = 12°C/W at 200 ft/min airflow enable reliable operation up to +85°C case temperature |
Applications
| Network Router Control Plane | Industrial HMI Controller |
|---|---|
Use Scenario: Real-time management of routing tables, ACL updates, and SNMP agent response in Layer 3 enterprise routers. IC Role / Device Role / Timing Role: Primary control-plane CPU executing Linux-based routing stack with deterministic interrupt latency under 5 µs. Use Value: 16KB lockable caches retain critical kernel ISRs and routing table lookups; 32-bit bus matches cost-optimized DDR1 memory subsystems. | Use Scenario: Deterministic execution of PLC ladder logic and touchscreen GUI rendering in factory-floor HMIs. IC Role / Device Role / Timing Role: Single-chip controller running Windows® CE with hard real-time task scheduling via TLB-locked memory regions. Use Value: 96-entry TLB with per-entry page-size control (4KB–16MB) isolates I/O buffers and GUI frame buffers; industrial temp rating ensures uptime in unconditioned enclosures. |
| Set-Top Box Middleware Engine | Medical Imaging Front-End Processor |
Use Scenario: Decoding MPEG-2 transport streams and managing conditional access modules in cable STBs. IC Role / Device Role / Timing Role: Application processor handling middleware, EPG, and UI - not video decode acceleration. Use Value: MIPS-III ISA compatibility ensures reuse of legacy STB software stacks; JTAG boundary scan enables post-assembly functional test of dense PCBs. | Use Scenario: Preprocessing raw sensor data (ECG, EEG) and managing USB-connected peripherals in portable diagnostics devices. IC Role / Device Role / Timing Role: Low-power embedded host processor coordinating ADC acquisition, flash logging, and wireless telemetry. Use Value: WAIT-mode power management extends battery life; 3.3V-only I/O eliminates level-shifting components for 3.3V sensors and transceivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar embedded microprocessor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT79RC4640-180DZ | Same 128-pin QFP, 3.3V, 180 MHz; 8KB/8KB caches; no FPU; RC4000-class core (not RISCore4000) | Lacks floating-point unit and 64-bit integer execution - unsuitable for math-intensive firmware | Select when cost-sensitive designs require proven maturity and do not need FPU or cache locking |
| IDT79RC64V475-180DZ | 208-pin QFP; full 64-bit SysAD(63:0); same RISCore4000 core, caches, and FPU; identical 180 MHz speed grade | Requires redesigned PCB layout and wider memory subsystem - not drop-in compatible | Select only when application demands >500 MB/s external bandwidth and 64-bit data-path throughput |
Compared with IDT79RC4640-180DZ, the IDT79RC64V474-180DZ adds FPU, larger caches, and cache locking - justifying upgrade for real-time control. Versus IDT79RC64V475-180DZ, it trades bandwidth for pin-count and BOM simplicity in cost-constrained 32-bit memory systems.
Availability
IDT79RC64V474-180DZ is available at Aetrix Electronics and suitable for internetworking equipment, industrial HMIs, medical diagnostics, and Windows® CE–based embedded systems requiring stable component supply across multi-year production cycles.
Supply support for IDT79RC64V474-180DZ 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, Inc. (IDT) was a fabless semiconductor company specializing in high-performance timing, memory interface, RF, and embedded processor solutions before its acquisition by Renesas Electronics in 2019.
IDT79RC64V474-180DZ belongs to the RISController™ family of embedded microprocessors, designed specifically for cost-sensitive, high-throughput control-plane applications in networking and multimedia where 64-bit processing power must coexist with 32-bit memory economics.
FAQ
What is the maximum operating frequency of the IDT79RC64V474-180DZ?
The IDT79RC64V474-180DZ is rated for a maximum pipeline clock frequency of 180 MHz. This speed grade is achieved using an internal PLL that multiplies a 22.5 MHz MasterClock by ×8. The device's electrical specifications, thermal design, and timing parameters are fully characterized and guaranteed at this frequency across the industrial temperature range (−40°C to +85°C).
Does the IDT79RC64V474-180DZ support 64-bit external data transfers?
No, the IDT79RC64V474-180DZ supports only a 32-bit external system interface (SysAD31:0). It is packaged in a 128-pin QFP and explicitly designed as the 32-bit bus variant of the RC64474 family. For 64-bit external data transfers, IDT offers the pin-incompatible IDT79RC64V475-180DZ in a 208-pin QFP package.
Is the IDT79RC64V474-180DZ pin-compatible with the RC4640?
Yes, the IDT79RC64V474-180DZ is 100% pin-compatible and socket-compatible with the IDT79RC4640-180DZ. Both use the same 128-pin QFP footprint, identical pin functions, and share the same 32-bit bus protocol - enabling direct hardware replacement without PCB modification.
What debug and test interfaces does the IDT79RC64V474-180DZ provide?
The IDT79RC64V474-180DZ provides full IEEE 1149.1 JTAG boundary-scan support via dedicated pins (TDI, TDO, TCK, TMS, TRST*, JTAG32*), enabling structural testing of solder joints and interconnects. It also supports serial boot-mode configuration (ModeClock/ModeIn) and asynchronous interrupt-driven debugging through its six maskable Int*(5:0) lines and NMI* input.
Can the IDT79RC64V474-180DZ operate in big-endian mode?
Yes, the IDT79RC64V474-180DZ supports both little-endian and big-endian data ordering. Endianness is configured at boot time via bit 8 (EndBit) in the serial mode configuration stream. When EndBit = 1, the processor operates in big-endian mode; when EndBit = 0, it operates in little-endian mode - matching standard MIPS-III behavior.
IDT79RC64V474-180DZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 128-BQFP Exposed Pad
- Series:
- -
- Packaging:
- Tray
- Product Status:
- Obsolete
- Core Processor:
- MIPS-I
- Number of Cores/Bus Width:
- 1 Core, 64-Bit
- Speed:
- 180MHz
- Co-Processors/DSP:
- System Control; CP0
- RAM Controllers:
- SDRAM
- Graphics Acceleration:
- No
- Display & Interface Controllers:
- -
- Ethernet:
- -
- SATA:
- -
- USB:
- -
- Voltage - I/O:
- 3.3V
- Operating Temperature:
- 0°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Security Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 128-PQFP (28x28)
- Additional Interfaces:
- -
IDT79RC64V474-180DZ FAQ
1.How can I place an order for IDT79RC64V474-180DZ through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT79RC64V474-180DZ 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 IDT79RC64V474-180DZ reliable?
The price and inventory of IDT79RC64V474-180DZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT79RC64V474-180DZ is usually 5 days.
3.What payment methods are accepted for IDT79RC64V474-180DZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT79RC64V474-180DZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT79RC64V474-180DZ?
IDT79RC64V474-180DZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT79RC64V474-180DZ 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 IDT79RC64V474-180DZ?
For technical support, including IDT79RC64V474-180DZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT79RC64V474-180DZ requirements.
6.How does Aetrix verify that IDT79RC64V474-180DZ is sourced from the original manufacturer or authorized distributors?
All IDT79RC64V474-180DZ 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 IDT79RC64V474-180DZ meets industry standards.
7.What is the process for return or replacement of IDT79RC64V474-180DZ?
All IDT79RC64V474-180DZ units undergo pre-shipment inspection (PSI). If there is an issue with IDT79RC64V474-180DZ, 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 IDT79RC64V474-180DZ part is unused and in its original packaging.
Return procedure for IDT79RC64V474-180DZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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