Renesas 70T3319S200BC8

Overview

70T3319S200BC8 from Integrated Device Technology is a high-speed 256K × 18-bit synchronous dual-port static RAM with true dual-port architecture enabling simultaneous read/write access to the same memory location. It operates at 200MHz (5ns cycle time), supports selectable 2.5V or 3.3V I/O interfaces per port, and features pipelined/flow-through output modes - used in high-bandwidth packet buffering, FPGA co-processor memory, and real-time DSP data exchange.

For engineers reviewing the 70T3319S200BC8 datasheet, 70T3319S200BC8 pinout, 70T3319S200BC8 application, or 70T3319S200BC8 equivalent, key selection criteria include its 200MHz commercial-grade timing (3.4ns clock-to-data), dual chip enables for depth expansion, JTAG-compliant boundary scan, and independent voltage-selectable ports - critical for heterogeneous bus interfacing in telecom line cards and network processors.

Technical Context

The 70T3319S200BC8 implements fully synchronous dual-port operation with registered address, data, and control inputs on both left and right ports, achieving 1.5ns setup and 0.5ns hold times at 200MHz. Its self-timed write architecture minimizes cycle time dependency on external timing margins.

Each port supports independent I/O voltage selection (2.5V or 3.3V) via dedicated OPTL/OPTR pins, with corresponding VDDQL/VDDQR supplies. The device includes address strobe (ADSL/ADSR), counter enable (CNTENL/CNTENR), repeat (REPEATL/REPEATR), and collision/interrupt flags - enabling burst-mode address sequencing and inter-port synchronization without external logic.

Key Specifications

Pinout & Package

70T3319S200BC8 is housed in a 256-pin Ball Grid Array (BGA) package with 17mm × 17mm body size and 1.0mm ball pitch. All VDD pins require connection to 2.5V ±100mV; VDDQL/VDDQR must match selected I/O voltage (2.5V or 3.3V) per port based on OPTL/OPTR state.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-200AXC and IDT70V27L15PF8, the 70T3319S200BC8 uniquely supports per-port I/O voltage selection, IEEE 1149.1 JTAG, and pipelined/flow-through dual-mode operation - making it the only option for high-reliability, mixed-voltage, testable dual-port memory subsystems.

Availability

70T3319S200BC8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, and defense electronics requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for 70T3319S200BC8 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 was engineered specifically for high-bandwidth, low-latency dual-port memory applications in networking ASICs, FPGA-based accelerators, and real-time signal processing systems - emphasizing deterministic timing, voltage flexibility, and system-level testability.

FAQ

What is the maximum operating frequency of the 70T3319S200BC8?

The 70T3319S200BC8 is rated for 200MHz operation (5ns cycle time) in commercial temperature range (0°C to +70°C). This is confirmed by AC Electrical Characteristics Table 11 in the datasheet, which specifies tCYC2 = 5ns minimum for pipelined mode. The 200MHz speed grade is only available in the 256-pin BGA package - not in the 208-pin fpBGA variant.

Does the 70T3319S200BC8 support independent I/O voltage selection on each port?

Yes, the 70T3319S200BC8 supports independent 2.5V or 3.3V I/O operation per port using OPTL and OPTR pins. When OPTL = VDD (2.5V), the left port operates at 3.3V levels and requires VDDQL = 3.3V; when OPTL = VSS (0V), it operates at 2.5V levels with VDDQL = 2.5V. The same applies independently to the right port via OPTR and VDDQR.

What is the function of the ADSL and ADSR pins on the 70T3319S200BC8?

The ADSL and ADSR pins are Address Strobe Enable inputs that latch the current address into the internal address counter. When asserted (VIL), they load the address present on A0L–A17L (or A0R–A17R) into the counter, enabling burst-mode sequential access. This eliminates the need for external address increment logic in applications like packet header parsing or FFT bin addressing.

How does the sleep mode (ZZL/ZZR) affect power consumption of the 70T3319S200BC8?

When ZZL and/or ZZR are asserted (VIH), the 70T3319S200BC8 enters sleep mode, reducing dynamic current to 5–15mA while retaining JTAG functionality. Per Table 9, ISB3 and Izz are both 5–15mA (typ/max) under these conditions. Static inputs (PL/FTx, OPTx) remain active, but all dynamic inputs except JTAG are disabled - ideal for low-power idle states in battery-backed systems.

Can the 70T3319S200BC8 be used in industrial temperature applications?

No, the 70T3319S200BC8 is specified only for commercial temperature range (0°C to +70°C). Industrial-grade operation (–40°C to +85°C) is supported only in the S133 and S166 speed grades (e.g., 70T3319S133BC8 or 70T3319S166BC8), as stated in Table 4 and Note 7 on page 9 of the datasheet. The "S200" suffix explicitly denotes commercial-only qualification.