Renesas 70T3599S200BC

Overview

70T3599S200BC 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 200MHz (5ns cycle time), supports 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 applications.

For engineers reviewing the 70T3599S200BC datasheet, 70T3599S200BC pinout, 70T3599S200BC application, or 70T3599S200BC equivalent, key selection criteria include its 200MHz commercial-grade timing (3.4ns tCD2), independent port voltage configuration via OPT pins, JTAG-compliant IEEE 1149.1 test support, and 256-pin BGA package with industrial-temperature-compatible variants.

Technical Context

The 70T3599S200BC 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 tSA, 0.5ns tHA) at 200MHz. Its dual-chip-enable architecture allows depth expansion without external logic, while counter enable (CNTEN) and repeat (REPEAT) functions support sequential burst addressing.

Each port features independent power domains: VDD = 2.5V ±100mV for core logic, and VDDQ configurable to either 3.3V ±150mV or 2.5V ±100mV via OPTL/OPTR pins. The device includes interrupt and collision detection flags (INTR/COLR, INTL/COLL), sleep mode (ZZL/ZZR), and JTAG boundary-scan support compliant with IEEE 1149.1.

Key Specifications

Pinout & Package

70T3599S200BC is housed in a 256-pin Ball Grid Array (BGA) package (BC256/BCG256), measuring 17 mm × 17 mm × 1.4 mm with 1.0 mm ball pitch. All VDD pins require connection to 2.5V; VDDQ pins must be supplied at 3.3V if corresponding OPT pin is set to VDD, or 2.5V if OPT is tied to VSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-200AXC and IDT70V9269L15PF, the 70T3599S200BC uniquely delivers per-port I/O voltage configurability, pipelined timing at 200MHz, and integrated JTAG-making it the only option among the three that meets modern high-speed, mixed-voltage, and testable system requirements.

Availability

70T3599S200BC is available at Aetrix Electronics and suitable for telecom infrastructure, network security appliances, and industrial automation systems requiring stable component supply across extended production lifecycles.

Supply support for 70T3599S200BC 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 ICs for communications, computing, and industrial markets.

The 70T35xx family was designed specifically for high-bandwidth, low-latency shared-memory applications in packet-switched networks, telecom base stations, and real-time embedded control systems requiring true dual-port synchronous operation.

FAQ

What is the maximum operating frequency of the 70T3599S200BC and under what conditions is it guaranteed?

The 70T3599S200BC is rated for 200MHz operation (5ns cycle time) in commercial temperature range (0°C to +70°C). This is guaranteed with VDD = 2.5V ±100mV, VDDQ = 3.3V ±150mV or 2.5V ±100mV per port, and proper termination per AC Test Conditions in the datasheet. The 200MHz speed is not available in fpBGA or PQFP packages-only in the 256-pin BGA variant like the 70T3599S200BC.

Does the 70T3599S200BC support independent voltage configuration on its left and right ports?

Yes, the 70T3599S200BC supports fully independent I/O voltage configuration via OPTL and OPTR pins. Setting OPTL to VDD configures the left port for 3.3V I/O levels (requiring VDDQL = 3.3V), while setting OPTR to VSS configures the right port for 2.5V I/O (requiring VDDQR = 2.5V). This enables direct interfacing with mixed-voltage ASICs or FPGAs without external level shifters.

How does the pipelined versus flow-through output mode affect timing in the 70T3599S200BC?

In pipelined mode (PL/FTX = VIH), the 70T3599S200BC achieves 3.4ns clock-to-data valid (tCD2) at 200MHz, ideal for burst transfers where latency can be hidden. In flow-through mode (PL/FTX = VIL), tCD1 is 10ns max-providing deterministic, zero-cycle-delay output timing critical for control-plane accesses. Mode selection is per-port and static during operation.

What is the function of the CNTEN and REPEAT pins on the 70T3599S200BC, and how are they used in practice?

CNTENL/R enables automatic address increment on each clock cycle, while REPEATL/R resets the internal address counter to the last ADS-loaded address. In practice, this allows the 70T3599S200BC to perform sequential burst reads/writes without CPU address updates-reducing host overhead in packet processors and digital signal chains where contiguous memory blocks are accessed repeatedly.

Is JTAG boundary-scan supported on the 70T3599S200BC, and which package options include it?

Yes, the 70T3599S200BC supports IEEE 1149.1 JTAG boundary-scan via dedicated TCK, TMS, TDI, TDO, and TRST pins. JTAG is available only in the 256-pin BGA (BC256/BCG256) package-the 208-pin fpBGA (BF208) and PQFP (DR208) variants omit JTAG due to pin count limitations, as explicitly noted in the datasheet.