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Renesas 70V3399S166PRF8

Name: 70V3399S166PRF8
Brand: Renesas
SKU: 70V3399S166PRF8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 70V3399S166PRF8

Manufacturer:: Renesas

Category:: Memory

Package:: 128-LQFP

Datasheet:: 70V3399S166PRF8.pdf

Description:: IC SRAM 2MBIT PARALLEL 128TQFP

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Product details

Overview

70V3399S166PRF8 from Integrated Device Technology is a high-speed 256K × 18-bit synchronous dual-port SRAM with true dual-port architecture enabling simultaneous read/write access to the same memory location from independent left and right ports. It operates at 166MHz (6ns cycle time), delivers 6Gbps aggregate bandwidth, supports selectable 3.3V or 2.5V I/O interfaces per port, and features pipelined output mode only (no flow-through) in its 128-pin TQFP package. It is used in real-time packet buffering for telecom line cards.

For engineers reviewing the 70V3399S166PRF8 datasheet, 70V3399S166PRF8 pinout, 70V3399S166PRF8 application, or 70V3399S166PRF8 equivalent, key selection criteria include guaranteed 166MHz operation under commercial temperature (0°C to +70°C), pipelined-only output timing (tCD2 ≤ 3.6ns), dual chip enable depth expansion capability, and independent VDDQ voltage selection per port via OPTL/OPTR pins.

Technical Context

This device implements full synchronous operation on both ports with registered address, data, and control inputs-enabling minimal setup (1.7ns) and hold (0.5ns) times at 166MHz. Its internal architecture includes dual address counters with ADS strobe, CNTEN enable, and REPEAT reset functionality for burst sequential addressing without external logic.

The memory array uses true dual-port static cells, allowing concurrent access without arbitration logic. JTAG boundary-scan (IEEE 1149.1) is omitted in this 128-pin TQFP variant due to pin count constraints, and the A17 address pin is no-connect-confirming its 256K × 18 (not 512K) density configuration.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	256K × 18 bits (4.5 Mbit total); A17 is NC, confirming 18-bit data width and 18 address bits usable as A0–A16 only
Max Clock Frequency	166 MHz (6 ns cycle time); validated for commercial temperature range only
Access Time	3.6 ns clock-to-data-out (tCD2) in pipelined mode; enables tight timing closure in high-speed FPGA-ASIC interconnects
I/O Voltage Support	Selectable 3.3 V or 2.5 V per port via OPTL/OPTR pins; VDDQ must match selected level-critical for mixed-voltage system interfacing
Operating Temperature	Commercial grade: 0°C to +70°C; industrial grade not supported at 166 MHz per datasheet Table 9
Power Supply	Core: 3.3 V ±150 mV (VDD); I/O: independently configurable 3.3 V or 2.5 V (VDDQL/VDDQR)
Package	128-pin TQFP (PKG128); 14 mm × 20 mm body; no JTAG or PL/FT mode support due to pin limitations

Pinout & Package

70V3399S166PRF8 is housed in a 128-pin Thin Quad Flatpack (TQFP) package with 0.5 mm pitch, 14 mm × 20 mm footprint, and 1.4 mm height. All VDD pins require 3.3 V supply; VDDQL and VDDQR must be set to 3.3 V or 2.5 V based on OPTL/OPTR logic levels prior to signal assertion.

Pin/Terminal	Circuit Role	Design Meaning
CLKL / CLKR	Port clock input	Synchronous edge-triggered timing reference for all registered inputs/outputs on respective port
CE0L/CE1L, CE0R/CE1R	Dual chip enables	Enable depth expansion without external logic: CE0X = L & CE1X = H activates port; CE0X = H or CE1X = L deselects
R/WL / R/WR	Read/write control	Active-high write enable; synchronous with CLK edge-determines data direction on I/Ox[0:17] bus
OEL / OER	Output enable	Asynchronous control; drives I/Ox[0:17] into high-Z when high-used for bus sharing
UBL / UBR, LBL / LBR	Byte enables	Independent upper (I/Ox[9:17]) and lower (I/Ox[0:8]) byte gating-supports 9-bit sub-word writes
A0L–A16L, A0R–A16R	Address inputs	17-bit address bus per port; A17 is NC per datasheet note-confirms 256K depth (2¹⁸ = 262K, but A17 unused)
I/O0L–I/O17L, I/O0R–I/O17R	Bidirectional data bus	18-bit multiplexed data path per port; direction controlled by R/Wx and CE states
OPTL / OPTR	I/O voltage select	DC-level input: VIH = 3.3 V interface, VIL = 2.5 V interface-sets VDDQX supply requirement and VIH/VIL thresholds
ADSL / ADSR	Address strobe	Latches current address into internal counter; enables auto-increment for burst transfers
CNTENL / CNTENR	Counter enable	Enables address counter advance on rising CLK when asserted low-required for sequential burst mode
REPEATL / REPEATR	Counter repeat	Resets address counter to last ADS-loaded value-supports circular buffer or ping-pong addressing

Key Features

Feature	Design Value
True dual-port memory cells	Enables concurrent, collision-free read/write access to identical addresses from left and right ports-eliminates arbitration logic in real-time inter-processor communication
Pipelined output mode only	Guaranteed 3.6 ns tCD2 at 166 MHz in 128-pin TQFP; removes flow-through timing ambiguity and simplifies PCB layout for fixed-latency systems
Dual chip enables per port	Supports seamless depth expansion across multiple devices using CE0/CE1 decode-no external address decoder required for stacked memory configurations
Independent I/O voltage selection	OPTL/OPTR pins allow left port at 3.3 V and right port at 2.5 V simultaneously-enables direct interfacing with mixed-voltage FPGAs or ASICs
Address counter with ADS/CNTEN/REPEAT	Hardware-accelerated burst addressing: ADS loads base address, CNTEN enables auto-increment, REPEAT resets to base-reduces controller overhead in packet FIFO applications

Applications

Telecom Line Card Buffering	FPGA-to-ASIC Interconnect Cache
Use Scenario: Storing and forwarding variable-length ATM or Ethernet frames between line-side PHY and switch fabric ASIC. IC Role / Device Role / Timing Role: Dual-port SRAM acts as zero-wait-state, low-latency frame buffer-left port accepts ingress data from PHY, right port feeds egress stream to switch fabric. Use Value: 166 MHz pipelined operation ensures sub-4 ns data availability, enabling deterministic frame latency critical for QoS-constrained carrier networks.	Use Scenario: High-bandwidth data staging between Xilinx Ultrascale+ FPGA and custom ASIC in radar signal processing pipeline. IC Role / Device Role / Timing Role: Serves as synchronized handshake buffer-FPGA writes processed samples to left port, ASIC reads via right port with precise clock domain crossing. Use Value: Independent 3.3 V/2.5 V I/O per port matches FPGA bank voltage and ASIC IO standard without level shifters-reducing BOM cost and signal integrity risk.
Industrial Motion Controller FIFO	Digital Audio Sample Buffer
Use Scenario: Holding interpolated motion trajectory points generated by real-time CPU and consumed by servo drive PWM engine. IC Role / Device Role / Timing Role: Dual-port SRAM functions as deterministic command FIFO-CPU writes via left port, motion engine reads via right port with jitter-free timing. Use Value: 6 ns cycle time and 1.7 ns address setup support microsecond-level motion update intervals required for <1 µm positioning accuracy.	Use Scenario: Temporary storage of 24-bit stereo audio samples between ADC oversampling stage and DSP decimation filter. IC Role / Device Role / Timing Role: Provides non-blocking sample transfer-left port captures ADC output, right port supplies DSP input, both at 192 kHz sampling rate. Use Value: 18-bit width natively supports two 24-bit samples (LSBs padded), while pipelined tCD2 ≤ 3.6 ns guarantees sample delivery within one 5.2 ns clock period at 192 MHz interface clock.

Telecom Line Card Buffering

FPGA-to-ASIC Interconnect Cache

Use Scenario: Storing and forwarding variable-length ATM or Ethernet frames between line-side PHY and switch fabric ASIC.

IC Role / Device Role / Timing Role: Dual-port SRAM acts as zero-wait-state, low-latency frame buffer-left port accepts ingress data from PHY, right port feeds egress stream to switch fabric.

Use Value: 166 MHz pipelined operation ensures sub-4 ns data availability, enabling deterministic frame latency critical for QoS-constrained carrier networks.

Use Scenario: High-bandwidth data staging between Xilinx Ultrascale+ FPGA and custom ASIC in radar signal processing pipeline.

IC Role / Device Role / Timing Role: Serves as synchronized handshake buffer-FPGA writes processed samples to left port, ASIC reads via right port with precise clock domain crossing.

Use Value: Independent 3.3 V/2.5 V I/O per port matches FPGA bank voltage and ASIC IO standard without level shifters-reducing BOM cost and signal integrity risk.

Industrial Motion Controller FIFO

Digital Audio Sample Buffer

Use Scenario: Holding interpolated motion trajectory points generated by real-time CPU and consumed by servo drive PWM engine.

IC Role / Device Role / Timing Role: Dual-port SRAM functions as deterministic command FIFO-CPU writes via left port, motion engine reads via right port with jitter-free timing.

Use Value: 6 ns cycle time and 1.7 ns address setup support microsecond-level motion update intervals required for <1 µm positioning accuracy.

Use Scenario: Temporary storage of 24-bit stereo audio samples between ADC oversampling stage and DSP decimation filter.

IC Role / Device Role / Timing Role: Provides non-blocking sample transfer-left port captures ADC output, right port supplies DSP input, both at 192 kHz sampling rate.

Use Value: 18-bit width natively supports two 24-bit samples (LSBs padded), while pipelined tCD2 ≤ 3.6 ns guarantees sample delivery within one 5.2 ns clock period at 192 MHz interface clock.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-port SRAM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY7C1362BV33-166AXC	256K × 18, 166 MHz, 3.3 V core/I/O; no independent VDDQ selection-both ports fixed at 3.3 V	Requires external level shifters if interfacing with 2.5 V ASIC; lacks REPEAT/ADSR counter control features	Choose when system uses uniform 3.3 V I/O and simpler address control suffices
AS7C3256B-166JCIN	256K × 18, 166 MHz, 3.3 V core; only 3.3 V I/O support; no OPT pin or dual-VDDQ capability	Cannot interface directly with 2.5 V logic; lacks pipelined/flow-through mode selection and address counter functions	Prefer when cost sensitivity outweighs mixed-voltage flexibility and burst addressing needs

Compared with CY7C1362BV33-166AXC and AS7C3256B-166JCIN, the 70V3399S166PRF8 uniquely supports per-port 2.5 V/3.3 V I/O selection and hardware address counting-making it optimal for heterogeneous voltage systems requiring burst-mode data transfer without CPU intervention.

Availability

70V3399S166PRF8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, and high-end digital audio equipment requiring stable component supply, long-term lifecycle assurance, and guaranteed commercial-grade 166 MHz performance.

Supply support for 70V3399S166PRF8 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, designs high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.

The 70V33xx family targets high-speed, low-latency data buffering in real-time systems-specifically engineered for applications demanding simultaneous dual-port access, deterministic pipelined timing, and flexible I/O voltage compatibility.

FAQ

What is the maximum operating frequency of the 70V3399S166PRF8?

The 70V3399S166PRF8 is rated for 166 MHz operation (6 ns clock cycle) in the commercial temperature range (0°C to +70°C). This frequency is not supported in industrial temperature conditions per datasheet Table 9; the industrial version is limited to 133 MHz. The 70V3399S166PRF8 achieves this speed using pipelined output mode only-no flow-through option is available in its 128-pin TQFP package.

Does the 70V3399S166PRF8 support JTAG boundary-scan testing?

No, the 70V3399S166PRF8 does not support JTAG boundary-scan. Although the IDT70V3319/99 family includes IEEE 1149.1-compliant JTAG features, the 128-pin TQFP package (PKG128) omits TCK, TMS, TDO, TDI, and TRST pins due to pin count limitations, as explicitly stated in the datasheet Pin Configuration notes. JTAG is only available on the 208-pin and 256-pin BGA variants.

Can the left and right ports of the 70V3399S166PRF8 operate at different I/O voltages?

Yes, the 70V3399S166PRF8 supports independent I/O voltage selection per port. OPTL sets the left port's interface voltage (3.3 V or 2.5 V), and OPTR sets the right port's-requiring corresponding VDDQL and VDDQR supplies at the selected level. This allows direct connection to mixed-voltage systems, such as a 3.3 V FPGA bank driving the left port and a 2.5 V ASIC interfacing to the right port, without external level shifters.

What is the function of the ADS, CNTEN, and REPEAT pins on the 70V3399S166PRF8?

On the 70V3399S166PRF8, ADS (Address Strobe) latches the current address into the internal counter; CNTEN (Counter Enable) allows the counter to auto-increment on each clock edge when asserted low; REPEAT resets the counter to the last ADS-loaded address. Together, they enable hardware-accelerated burst transfers-critical for applications like packet buffering where sequential memory access must occur without CPU overhead. These signals are independent of CE, R/W, and OE states.

Is the 70V3399S166PRF8 pin-compatible with other members of the IDT70V33xx family?

No, the 70V3399S166PRF8 is not pin-compatible with other IDT70V33xx variants in different packages. Its 128-pin TQFP footprint (PKG128) has distinct pin assignments-including NC on A17 and omission of JTAG and FT/PIPE mode pins-compared to the 208-pin fpBGA and 256-pin BGA versions. Direct replacement requires matching package type and verifying pin mapping against the specific variant's datasheet diagram.

70V3399S166PRF8 Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 128-LQFP

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:: 3.15V ~ 3.45V

Operating Temperature:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 128-TQFP (14x20)

70V3399S166PRF8 FAQ

1.How can I place an order for 70V3399S166PRF8 through Aetrix?

Please submit a Request for Quotation (RFQ) for 70V3399S166PRF8 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 70V3399S166PRF8 reliable?

The price and inventory of 70V3399S166PRF8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 70V3399S166PRF8 is usually 5 days.

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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 70V3399S166PRF8 transactions.

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4.How is shipping managed for 70V3399S166PRF8?

70V3399S166PRF8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 70V3399S166PRF8 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 70V3399S166PRF8?

For technical support, including 70V3399S166PRF8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 70V3399S166PRF8 requirements.

6.How does Aetrix verify that 70V3399S166PRF8 is sourced from the original manufacturer or authorized distributors?

All 70V3399S166PRF8 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 70V3399S166PRF8 meets industry standards.

7.What is the process for return or replacement of 70V3399S166PRF8?

All 70V3399S166PRF8 units undergo pre-shipment inspection (PSI). If there is an issue with 70V3399S166PRF8, 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 70V3399S166PRF8 part is unused and in its original packaging.

Return procedure for 70V3399S166PRF8:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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