Renesas 70T3519S133BC

Overview

70T3519S133BC from Integrated Device Technology is a high-speed 256K × 36-bit synchronous dual-port SRAM with true dual-port architecture enabling simultaneous read/write access to the same memory location. It operates at 133MHz (7.5ns cycle time), supports independent 2.5V core and selectable 2.5V/3.3V I/O interfaces per port, and features pipelined or flow-through output modes for burst data transfer in telecom switching fabric and network packet buffering.

For engineers reviewing the 70T3519S133BC datasheet, 70T3519S133BC pinout, 70T3519S133BC application, or 70T3519S133BC equivalent, this device delivers deterministic low-latency memory access with dual chip enables for depth expansion, JTAG-compliant boundary scan, industrial temperature support (–40°C to +85°C), and sleep-mode power management via ZZL/ZZR pins.

Technical Context

This device implements fully synchronous operation on both left and right ports with register-controlled address, data, and control inputs-enabling minimal setup/hold times (1.5ns setup, 0.5ns hold @ 200MHz) and fast clock-to-data-out (4.2ns max in flow-through mode). Its dual-port memory array uses true dual-port cells, not pseudo-dual-port or FIFO-based emulation.

The architecture includes independent address counters with ADS strobe, CNTEN enable, and REPEAT latch per port; separate byte-enable logic (BE0–BE3) for 9-bit granularity writes; and collision/interrupt flag generation for inter-port coordination. Power management includes CE-driven standby and ZZ-pin–activated deep-sleep mode with 5mA typical current.

Key Specifications

Pinout & Package

70T3519S133BC is housed in a 256-pin Ball Grid Array (BC256) package with 17mm × 17mm footprint and 1.0mm ball pitch. All VDD pins require connection to 2.5V; VDDQ pins must match OPT pin selection (3.3V if OPT = VDD, 2.5V if OPT = VSS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-133BZI and AS7C3256B-133JCIN, the 70T3519S133BC uniquely combines industrial temperature rating, per-port I/O voltage flexibility, hardware address counters, and JTAG testability-making it the only option supporting mixed-voltage, low-power, and test-ready designs in a single package.

Availability

70T3519S133BC is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and medical imaging systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 70T3519S133BC 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 high-performance computing and communications.

The 70T35xx family was designed specifically for deterministic, low-latency memory sharing between heterogeneous processors and ASICs in telecom, networking, and real-time control systems.

FAQ

What is the maximum operating frequency of the 70T3519S133BC at industrial temperature?

The 70T3519S133BC is rated for 133MHz operation across the full industrial temperature range (–40°C to +85°C), with guaranteed 7.5ns clock cycle time and 4.2ns max access time in flow-through mode. This specification is validated per datasheet Table 11 and applies to both ports simultaneously under worst-case voltage and temperature conditions.

Does the 70T3519S133BC support independent voltage selection for each port's I/O interface?

Yes-the 70T3519S133BC 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 I/O levels with VDDQL = 3.3V; setting OPTR = VSS (0V) configures the right port for 2.5V I/O levels with VDDQR = 2.5V. This enables direct interfacing with mixed-voltage SoCs without external level shifters.

How does the address counter function work on the 70T3519S133BC?

The 70T3519S133BC implements independent address counters on each port using ADSx (address strobe), CNTENx (counter enable), and REPEATx signals. When CNTENx is asserted, the internal address increments on each CLK edge regardless of CE state. ADSx loads an external address into the counter; REPEATx resets the counter to that last loaded address-enabling efficient burst transfers without CPU address updates.

What power-saving modes does the 70T3519S133BC support?

The 70T3519S133BC offers three power-saving mechanisms: (1) CE-driven standby (ISB1–ISB4), (2) full CMOS-level standby (ISB3, 5mA typ), and (3) deep-sleep mode activated by asserting ZZL and/or ZZR (Izz = 5mA typ). Sleep mode disables all dynamic inputs except JTAG, preserving test access while cutting active current by >95%.

Is JTAG boundary scan supported on the 70T3519S133BC?

Yes-the 70T3519S133BC implements full IEEE 1149.1 JTAG boundary scan with dedicated TDI, TDO, TCK, TMS, and TRST pins. This functionality is available in the BC256 BGA package and enables in-system testing, interconnect verification, and programming of adjacent devices without physical probe access.