Renesas 70T3319S200BC

Overview

70T3319S200BC from Integrated Device Technology is a high-speed synchronous dual-port SRAM 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 200MHz operation (5ns cycle time), pipelined or flow-through output modes, and simultaneous read/write access on independent left/right ports - used in telecom line cards for real-time packet buffering and header processing.

For engineers reviewing the 70T3319S200BC datasheet, 70T3319S200BC pinout, 70T3319S200BC application, or 70T3319S200BC equivalent, key selection criteria include dual-port timing latency (3.4ns clock-to-data in pipelined mode), JTAG-compliant boundary scan support, industrial-grade voltage tolerance (±100mV on VDD), and BGA package compatibility with high-density FPGA-based control planes.

Technical Context

This device implements true dual-port memory cells with fully synchronous operation on both ports, using input registers for address, data, and control signals to achieve tight 1.5ns setup / 0.5ns hold timing margins at 200MHz. Each port features independent clock (CLKL/CLKR), chip enables (CE0/CE1), byte enables (UBL/LBL), and pipeline/flow-through mode selection (PL/FTL/R).

It integrates collision detection and interrupt flags (COLL/INTR), address counter logic with ADS/CNTEN/REPEAT controls, and dual-cycle deselect (DCD) for pipelined output mode. Power management includes TTL- or CMOS-level standby modes and dedicated sleep pins (ZZL/ZZR) that disable dynamic inputs while preserving JTAG accessibility.

Key Specifications

Pinout & Package

70T3319S200BC is packaged in a 256-pin Ball Grid Array (BC256) with 1.0mm ball pitch and 17mm × 17mm body size. All VDD pins require 2.5V; VDDQ pins must match OPT pin state (2.5V if OPT = VSS, 3.3V if OPT = VDD). NC pins include A18L and A18R.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-200BZXI and IDT70V27L15PF8, the 70T3319S200BC delivers 3.4ns pipelined access, per-port voltage selectability, and JTAG debug - making it uniquely suited for new high-speed, mixed-voltage, test-critical embedded systems where latency and flexibility outweigh cost or package size constraints.

Availability

70T3319S200BC is available at Aetrix Electronics and suitable for telecom infrastructure, FPGA co-processing, real-time signal processing, and industrial motion control applications requiring stable component supply across extended product lifecycles.

Supply support for 70T3319S200BC 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 70T33xx family targets high-bandwidth, low-latency data buffering in synchronous systems - specifically engineered for telecom line cards, network processors, and FPGA-based accelerators needing deterministic dual-port access and mixed-voltage interoperability.

FAQ

What is the maximum operating frequency of the 70T3319S200BC, and which package supports it?

The 70T3319S200BC is rated for 200MHz operation (5ns cycle time), and this speed grade is exclusively supported in the BC256 256-pin BGA package. The BF208 fpBGA variant is limited to 166MHz and 133MHz speed grades - attempting 200MHz in BF208 violates AC timing specifications and risks data corruption.

Does the 70T3319S200BC support independent voltage selection for each port's I/O interface?

Yes, the 70T3319S200BC supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL = VDD (2.5V) configures the left port for 3.3V signaling (requiring VDDQL = 3.3V), while OPTL = VSS (0V) sets it to 2.5V (VDDQL = 2.5V). The same applies independently to the right port - enabling mixed-voltage system integration without level shifters.

How does the address counter function in the 70T3319S200BC, and what role does the REPEAT pin play?

The 70T3319S200BC includes an internal address counter enabled by CNTENL/CNTENR. When asserted, it auto-increments on each CLK edge regardless of CE/UB/LB states. The REPEATL/REPEATR pin resets the counter to the last valid address loaded via ADSL/ADSR - allowing precise restart of burst reads after interrupt servicing. This eliminates software overhead in circular buffer implementations.

What is the purpose of the ZZL and ZZR pins on the 70T3319S200BC, and how do they affect JTAG functionality?

The ZZL and ZZR pins place the respective port into ultra-low-power sleep mode, disabling all dynamic inputs (clock, address, data) while retaining static input functionality (PL/FT, OPT, and the ZZ pins themselves). Critically, JTAG signals (TCK, TMS, TDI, TDO, TRST) remain fully operational during sleep - enabling boundary scan testing even when memory ports are powered down.

Can the 70T3319S200BC be used in industrial temperature applications, and what speed grades are qualified?

No, the 70T3319S200BC is specified only for commercial temperature range (0°C to +70°C). While the broader 70T33xx family includes industrial-grade variants (e.g., 70T3319S133BCI), the S200 speed grade is not qualified for -40°C to +85°C operation. Using 70T3319S200BC outside its rated temperature range may cause timing violations or increased bit error rates.