Renesas 70T3599S133BCI8

Overview

70T3599S133BCI8 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 on independent left and right ports. It operates at 133MHz (7.5ns cycle time), supports selectable 2.5V or 3.3V I/O interfaces per port, and delivers 9.5Gbps aggregate bandwidth in industrial temperature range (–40°C to +85°C). It is used in real-time packet buffering for telecom line cards.

For engineers reviewing the 70T3599S133BCI8 datasheet, 70T3599S133BCI8 pinout, 70T3599S133BCI8 application, or 70T3599S133BCI8 equivalent, key selection criteria include pipelined/flow-through output mode selection, independent port voltage configuration via OPT pins, collision/interrupt flag timing (tCOLS ≤ 4.2ns), and 256-pin BGA package compatibility with DDR2/DDR3 memory controller co-location.

Technical Context

This device implements fully synchronous operation on both ports with register-controlled address, data, and control inputs-enabling minimal setup/hold times (tSA = 1.8ns, tHA = 0.5ns) and fast clock-to-data-out (tCD2 = 4.2ns in pipelined mode). Its dual chip enables (CE0/CE1 per port) support depth expansion without external logic, while counter enable (CNTEN) and repeat (REPEAT) features enable burst-mode sequential addressing.

The memory array uses true dual-port cells with separate byte-enable controls (BE0–BE3) for 9-bit-wide data segments, and includes JTAG IEEE 1149.1 compliance for boundary scan. Sleep mode (ZZL/ZZR) reduces current to ≤20mA while preserving JTAG accessibility, and collision detection logic asserts COLR/COLL flags within 4.2ns of conflicting accesses.

Key Specifications

Pinout & Package

70T3599S133BCI8 is housed in a 256-pin Ball Grid Array (BGA) package (BC256/BCG256), measuring 17mm × 17mm × 1.4mm with 1.0mm ball pitch. All VDD pins require 2.5V supply; VDDQ pins must be set to 2.5V or 3.3V depending on OPT pin state per port. A17L and A17R are no-connect (NC) pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-133AXC and IDT70V27L15PF8, the 70T3599S133BCI8 uniquely combines 133MHz pipelined operation, per-port voltage flexibility, hardware collision detection, and industrial temperature support in a space-efficient 256-pin BGA-making it optimal for next-generation telecom and radar systems requiring deterministic low-latency shared memory.

Availability

70T3599S133BCI8 is available at Aetrix Electronics and suitable for telecom infrastructure, radar signal processing, real-time DSP, and industrial automation applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 70T3599S133BCI8 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 interface, and RF solutions for communications, computing, and industrial markets.

The 70T35xx family targets high-bandwidth, low-latency shared-memory applications in networking equipment and real-time signal processing systems-emphasizing true dual-port concurrency, flexible I/O voltage, and hardware-assisted arbitration.

FAQ

What is the maximum operating frequency of the 70T3599S133BCI8 in industrial temperature range?

The 70T3599S133BCI8 is rated for 133MHz operation (7.5ns clock cycle time) across the full industrial temperature range of –40°C to +85°C. This specification is validated per datasheet Table 11 and applies to both pipelined and flow-through output modes. The device does not support 166MHz or 200MHz operation in industrial grade-those speeds are commercial-only variants.

Does the 70T3599S133BCI8 support independent voltage selection for left and right ports?

Yes, the 70T3599S133BCI8 supports independent I/O voltage selection per port using OPTL and OPTR pins. Setting OPTL to VDD (2.5V) configures the left port for 3.3V signaling (requiring VDDQL = 3.3V), while setting OPTR to VSS (0V) configures the right port for 2.5V signaling (requiring VDDQR = 2.5V). This enables mixed-voltage system integration without level shifters.

How does collision detection work on the 70T3599S133BCI8, and what is its timing guarantee?

The 70T3599S133BCI8 asserts COLL (left port) or COLR (right port) within 4.2ns (tCOLS) of detecting simultaneous access to the same memory address from both ports. These open-drain outputs signal conflict to external logic or processors. Collision reset (tCOLR) also occurs within 4.2ns after the conflicting access ends. No software polling is required-the hardware flag is fully asynchronous and deterministic.

What package type and pin count does the 70T3599S133BCI8 use, and are A17L/A17R functional?

The 70T3599S133BCI8 uses a 256-pin Ball Grid Array (BGA) package designated BC256 or BCG256, with 17mm × 17mm body size and 1.0mm ball pitch. Per datasheet Note 1 on page 3, A17L and A17R are no-connect (NC) pins-only A0L–A16L and A0R–A16R are valid address inputs, supporting the 256K × 36 organization (2¹⁷ = 131,072 words; 256K = 262,144 requires A17, but this variant omits it).

Can the 70T3599S133BCI8 enter low-power sleep mode, and how is it controlled?

Yes, the 70T3599S133BCI8 supports hardware sleep mode via ZZL and ZZR pins. Asserting either pin high disables dynamic inputs (except JTAG), reducing current to ≤20mA in industrial grade. Sleep mode recovery requires exactly 3 clock cycles (tZZRC), and entry requires 2 cycles (tZZSC). Static inputs (PL/FTx, OPTx, ZZx themselves) remain active during sleep, enabling wake-up via external logic without full reset.