Renesas 70V3589S133BCI

Overview

70V3589S133BCI from IDT (now Renesas) is a high-speed 128K × 36-bit synchronous dual-port SRAM with independent left/right ports, 133MHz operation (7.5ns cycle time), pipelined or flow-through output modes, and industrial temperature support (–40°C to +85°C). It enables simultaneous read/write access to the same memory location in telecom switching fabrics, network packet buffers, and real-time DSP co-processing systems.

For engineers reviewing the 70V3589S133BCI datasheet, 70V3589S133BCI pinout, 70V3589S133BCI application, or 70V3589S133BCI equivalent, key selection criteria include dual-port timing latency (tCD2 ≤ 4.2ns), selectable 2.5V/3.3V I/O voltage per port via OPT pins, JTAG IEEE 1149.1 compliance, and depth expansion support using dual chip enables without external logic.

Technical Context

This device implements fully synchronous dual-port architecture with separate address, data, and control registers on both ports-enabling minimal setup (1.7ns) and hold (0.5ns) times at 133MHz. Its self-timed write mechanism maintains fast cycle time without external wait-state generation.

The memory supports independent voltage configuration: core VDD = 3.3V ±150mV, while each port's I/O and control voltage (VDDQ) is selectable between 2.5V (±100mV) and 3.3V (±150mV) via dedicated OPTL/OPTR pins-allowing mixed-voltage system interfacing without level shifters.

Key Specifications

Pinout & Package

70V3589S133BCI is available in a 208-pin fine-pitch Ball Grid Array (fpBGA) package with 0.8mm ball pitch and 15mm × 15mm body size. Pin functions are symmetrically distributed across left (L) and right (R) ports, with dedicated clock, address, data I/O, byte enable, chip enable, and control signals per port.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362KV18-133BZI and AS7C312836B-133BIN, the 70V3589S133BCI uniquely delivers 36-bit width with per-port voltage flexibility, JTAG debug capability, and hardware-optimized depth expansion-making it the only choice for high-bandwidth, mixed-voltage, production-testable dual-port memory subsystems.

Availability

70V3589S133BCI is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, and radar signal processing applications requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 70V3589S133BCI 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

Renesas Electronics (formerly Integrated Device Technology, IDT) is a global semiconductor leader specializing in high-performance timing, memory, and analog solutions for communications, computing, and industrial markets.

The IDT70V3589 product line was engineered specifically for deterministic, low-latency dual-access memory in real-time networking and signal processing systems-emphasizing synchronous timing precision, voltage flexibility, and testability.

FAQ

What is the maximum guaranteed operating frequency of the 70V3589S133BCI across its full industrial temperature range?

The 70V3589S133BCI is rated for 133MHz operation (7.5ns cycle time) over the full –40°C to +85°C industrial temperature range. This specification is validated per AC Electrical Characteristics Table 11 in the official datasheet, with tCYC2 ≤ 7.5ns and tCD2 ≤ 4.2ns guaranteed under worst-case voltage and temperature conditions. The part does not support 166MHz operation in industrial grade.

How does the 70V3589S133BCI handle voltage mismatch between its left and right ports?

The 70V3589S133BCI supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL = VIL configures the left port for 2.5V I/O operation (with VDDQL = 2.5V), while OPTR = VIH configures the right port for 3.3V I/O (with VDDQR = 3.3V). This eliminates level-shifter requirements in mixed-voltage systems such as FPGA-DSP interfaces.

Does the 70V3589S133BCI support JTAG boundary-scan testing, and which pins are used?

Yes, the 70V3589S133BCI fully complies with IEEE 1149.1 JTAG boundary-scan. It uses five dedicated pins: TCK (pin E16 in fpBGA), TMS (pin P3), TDI (pin B4), TDO (pin A4), and TRST (pin P5). These signals operate at the VDDQ voltage of the port where they are physically located (typically tied to VDDQL or VDDQR depending on board routing).

What is the function of the REPEATL and REPEATR signals in the 70V3589S133BCI address counter?

REPEATL and REPEATR are asynchronous latch controls that reset the internal address counter to the last valid address loaded via ADSL or ADSR, respectively. When asserted, they enable burst sequential access without external address increment logic-critical for DMA-like transfers in packet buffering or FFT staging applications. The latch value is not preset at power-up and must be initialized via an ADS strobe.

Can the 70V3589S133BCI be used in depth-expanded configurations, and what pins enable this?

Yes, the 70V3589S133BCI supports depth expansion using dual chip enables (CE0L/CE1L and CE0R/CE1R). By tying CE0 of one device to CE1 of the next and cascading address lines, multiple devices can be stacked to increase memory depth without additional decoding logic. This is explicitly supported in the datasheet's Truth Table I and Multi-Device Timing Waveforms (Figures 08–09).