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Renesas 70T3399S166BC8
- Part No.:
- 70T3399S166BC8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 256-LBGA
- Datasheet:
-
70T3399S166BC8.pdf
- Description:
- IC SRAM 2MBIT PARALLEL 256CABGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,663
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Product details
Overview
70T3399S166BC8 from Integrated Device Technology is a high-speed synchronous dual-port static RAM with 256K × 18-bit organization (4.5 Mbit), 2.5V core supply, and selectable 2.5V/3.3V I/O interface per port. It supports pipelined or flow-through output modes, features dual chip enables for depth expansion, and operates at 166MHz (6ns cycle time) across industrial temperature range (–40°C to +85°C) in 256-pin BGA package.
For engineers reviewing the 70T3399S166BC8 datasheet, 70T3399S166BC8 pinout, 70T3399S166BC8 application, or 70T3399S166BC8 equivalent, key selection criteria include simultaneous dual-port access latency, JTAG-compliant boundary scan support, byte-selectable write capability, collision/interrupt flag signaling, and independent port voltage configuration via OPT pins.
Technical Context
This device implements true dual-port SRAM architecture enabling concurrent read/write access to the same memory location from left and right ports. Each port includes fully synchronous registers on address, data, control, and clock inputs-ensuring minimal setup (1.7ns) and hold (0.5ns) times at 166MHz operation.
It supports independent port configuration: VDDQ and OPT pins allow one port to operate at 3.3V LVTTL levels while the other runs at 2.5V, with corresponding VDDQ supplies. Pipelined output mode delivers 3.6ns clock-to-data-out; flow-through mode provides 12ns access with no pipeline delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 256K × 18-bit (4.5 Mbit); A17/A18 are No Connect per datasheet note |
| Max Clock Frequency | 166MHz - enables 5.95ns minimum clock cycle time in pipelined mode |
| Access Time | 3.6ns (pipelined), 12ns (flow-through) - determines real-time data availability timing |
| Supply Voltages | VDD = 2.5V ±100mV (core); VDDQ = 2.5V or 3.3V ±150mV per port - enables mixed-voltage system interfacing |
| Operating Temperature | –40°C to +85°C - qualified for industrial embedded and telecom infrastructure use |
| Package | 256-ball BGA (BC256), 17mm × 17mm × 1.4mm, 1.0mm ball pitch - standard footprint for high-density PCBs |
| JTAG Support | IEEE 1149.1 compliant - enables in-system test and debug without external probes |
Pinout & Package
70T3399S166BC8 is housed in a 256-pin Ball Grid Array (BC256) package with 1.0mm ball pitch and 17mm × 17mm body size. All VDD pins require 2.5V connection; VDDQ pins must match OPT pin state (3.3V if OPT = VDD, 2.5V if OPT = VSS). VSS pins connect to ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLKL / CLKR | Port-synchronous clock input | Drives internal registers on rising edge; defines timing reference for all port operations |
| CE0L/CE1L, CE0R/CE1R | Dual chip enable inputs | Enable depth expansion without external logic; CE0=VIL & CE1=VIH activates port |
| R/WL / R/WR | Read/write direction control | Asynchronous assertion sets data bus direction; synchronous sampling aligns with CLK edge |
| OEL / OER | Output enable (asynchronous) | Controls tri-state output drivers independently of clock - critical for bus sharing |
| UBL / LBL, UBR / LBR | Upper/lower byte enable | Enables 9-bit writes to I/O9–I/O17 or I/O0–I/O8 - supports multiplexed bus protocols |
| ADSL / ADSR | Address strobe enable | Latches current address into internal counter; enables burst address generation with CNTEN/REPEAT |
| INTL / INTR, COLL / COLR | Interrupt and collision flags | Open-drain outputs signal simultaneous access conflict or user-triggered interrupt event |
| ZZL / ZZR | Sleep mode control | Asserting VIH disables dynamic circuitry (except JTAG), reducing current to ≤15mA |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port memory cells | Enables simultaneous read/write to identical addresses - eliminates arbitration logic in FPGA co-processor interfaces |
| Selectable pipelined or flow-through output | Pipelined mode reduces effective access latency to 3.6ns; flow-through avoids pipeline bubbles in deterministic control loops |
| Dual chip enables (CE0/CE1) | Supports seamless depth expansion up to 1M×18 using multiple devices - no glue logic required |
| Independent port voltage configuration | OPTL/OPTR pins set each port's I/O voltage (2.5V or 3.3V) - enables interoperation with mixed-voltage ASICs/FPGAs |
| Collision detection & interrupt flags | COLx/INTx outputs signal contention or software-triggered events - simplifies real-time resource management |
Applications
| Telecom Line Card Buffering | FPGA Co-Processor Memory |
|---|---|
Use Scenario: High-throughput packet buffering between line interface ASIC and traffic manager in 10Gbps+ optical transport systems. IC Role / Device Role / Timing Role: Dual-port SRAM acts as zero-wait-state shared memory between ingress and egress processing pipelines. Use Value: Simultaneous access enables full-duplex packet queuing at 166MHz, eliminating FIFO bottlenecks and reducing jitter in QoS scheduling. | Use Scenario: Real-time data exchange between FPGA fabric and external microcontroller in motor control or radar signal processing. IC Role / Device Role / Timing Role: Provides deterministic, low-latency memory access for time-critical control algorithms running on FPGA and host MCU. Use Value: 3.6ns pipelined read enables sub-6ns response to sensor interrupts, meeting <10µs loop timing requirements. |
| Industrial PLC Data Logging | Test Equipment Pattern Memory |
Use Scenario: Storing timestamped I/O states and diagnostic logs in programmable logic controllers operating in harsh environments. IC Role / Device Role / Timing Role: Serves as nonvolatile-shadowed buffer with hardware collision detection for concurrent logging and HMI access. Use Value: Industrial temp rating (–40°C to +85°C) and sleep mode (<15mA) ensure reliable operation in uncooled enclosures with power cycling. | Use Scenario: Holding stimulus/response patterns for automated test equipment performing high-speed digital IC validation. IC Role / Device Role / Timing Role: Functions as high-bandwidth pattern store synchronized to ATE clock domains via dual-port isolation. Use Value: Independent 2.5V/3.3V port configuration allows direct interfacing to both legacy 3.3V DUTs and modern 2.5V ASICs without level shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1362BV33-166BZXI | 4Mbit (256K×16), 3.3V core, no JTAG, 166MHz max, TQFP-100 package | Lacks independent port voltage config and collision flags; requires external level translation for mixed-voltage systems | Choose when board space permits larger TQFP and JTAG is not required for production test. |
| AS7C33256B-166BIN | 4Mbit (256K×16), 3.3V only, no pipelined mode, 166MHz, 100-pin TQFP | No dual-voltage I/O, no pipelined output, no JTAG - simpler but less flexible timing and debug capability | Prefer for cost-sensitive industrial controls where voltage uniformity and debug simplicity outweigh performance flexibility. |
Compared with CY7C1362BV33-166BZXI and AS7C33256B-166BIN, the 70T3399S166BC8 offers unique advantages: independent 2.5V/3.3V port configuration, IEEE 1149.1 JTAG, pipelined output mode, and hardware collision detection - making it optimal for high-performance, mixed-voltage, and test-critical designs.
Availability
70T3399S166BC8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, FPGA-based accelerators, and automated test equipment requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.
Supply support for 70T3399S166BC8 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), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, RF, and power management solutions for communications, computing, and industrial markets.
The 70T33xx family was designed specifically for high-bandwidth, low-latency dual-access memory applications in telecom line cards, test equipment, and real-time embedded systems demanding deterministic timing and robust debug capability.
FAQ
What is the maximum operating frequency of the 70T3399S166BC8?
The 70T3399S166BC8 is rated for 166MHz operation across the industrial temperature range (–40°C to +85°C), achieving a 6ns clock cycle time in pipelined mode. This specification is validated per datasheet table 11 under "70T3339/19/99 S166 Com'l & Ind" conditions with VDD = 2.5V ±100mV.
Does the 70T3399S166BC8 support independent voltage configuration on each port?
Yes, the 70T3399S166BC8 supports independent I/O voltage configuration per port via OPTL and OPTR pins. Setting OPTX to VDD (2.5V) configures that port for 3.3V I/O operation with VDDQX = 3.3V; setting OPTX to VSS (0V) configures it for 2.5V I/O with VDDQX = 2.5V - enabling mixed-voltage system integration without external level shifters.
What package type is used for the 70T3399S166BC8?
The 70T3399S166BC8 uses a 256-ball BGA package (package code BC256), measuring 17mm × 17mm × 1.4mm with 1.0mm ball pitch. Pin configuration and ball map are documented in datasheet figures 3 and 4, confirming NC status for A17L/R and A18L/R per note 2.
How does the collision detection feature work on the 70T3399S166BC8?
The 70T3399S166BC8 asserts COLL or COLR outputs when both ports attempt simultaneous access to the same memory location. These open-drain flags are synchronized to the respective port clocks and provide 3.6ns set/reset timing (tCOLS/tCOLR), enabling hardware-level arbitration or interrupt-driven resolution in real-time systems without software polling overhead.
Is JTAG boundary scan supported on the 70T3399S166BC8?
Yes, the 70T3399S166BC8 fully supports IEEE 1149.1 JTAG boundary scan via dedicated TCK, TMS, TDI, TDO, and TRST pins. JTAG operation remains functional even during sleep mode (ZZ asserted), allowing in-system test and debug throughout the device's power states - a key advantage over non-JTAG dual-port SRAMs like AS7C33256B.
70T3399S166BC8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 256-LBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Synchronous
- Memory Size:
- 2Mbit
- Memory Organization:
- 128K x 18
- Memory Interface:
- Parallel
- Clock Frequency:
- 166 MHz
- Write Cycle Time - Word, Page:
- -
- Access Time:
- 3.6 ns
- Voltage - Supply:
- 2.4V ~ 2.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 256-CABGA (17x17)
70T3399S166BC8 FAQ
1.How can I place an order for 70T3399S166BC8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 70T3399S166BC8 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 70T3399S166BC8 reliable?
The price and inventory of 70T3399S166BC8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70T3399S166BC8 is usually 5 days.
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Once your 70T3399S166BC8 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 70T3399S166BC8?
For technical support, including 70T3399S166BC8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70T3399S166BC8 requirements.
6.How does Aetrix verify that 70T3399S166BC8 is sourced from the original manufacturer or authorized distributors?
All 70T3399S166BC8 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 70T3399S166BC8 meets industry standards.
7.What is the process for return or replacement of 70T3399S166BC8?
All 70T3399S166BC8 units undergo pre-shipment inspection (PSI). If there is an issue with 70T3399S166BC8, 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 70T3399S166BC8 part is unused and in its original packaging.
Return procedure for 70T3399S166BC8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
70T3399S166BC8 Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
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24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
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