Renesas 70T3599S200BC8

Overview

70T3599S200BC8 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 independent 2.5V core and selectable 2.5V/3.3V I/O interfaces per port, and delivers 14Gbps aggregate bandwidth. It is used in high-throughput packet buffering for telecom line cards and FPGA co-processor memory subsystems.

For engineers reviewing the 70T3599S200BC8 datasheet, 70T3599S200BC8 pinout, 70T3599S200BC8 application, or 70T3599S200BC8 equivalent, key selection criteria include pipelined vs. flow-through output mode timing, dual-voltage I/O configurability per port, industrial-grade 166MHz operation capability, and BGA package compatibility with high-density PCB layouts.

Technical Context

The 70T3599S200BC8 implements fully synchronous dual-port operation with independent clock domains (CLKL/CLKR), register-controlled address/data/control inputs, and self-timed write logic enabling minimal setup/hold times. Its dual chip enables (CE0/CE1 per port) support depth expansion without external logic, while counter enable (CNTEN) and repeat (REPEAT) features enable burst address generation.

It integrates JTAG IEEE 1149.1 boundary-scan support, interrupt/collision detection flags (INTR/COLR, INTL/COLL), and sleep mode (ZZL/ZZR) that disables dynamic inputs while preserving JTAG accessibility. Address A17 is NC, confirming its 256K × 36 configuration (18-bit address space truncated to 17 bits).

Key Specifications

Pinout & Package

70T3599S200BC8 is housed in a 256-pin Ball Grid Array (BC256) package with 17mm × 17mm footprint and 1.0mm ball pitch. All VDD pins require 2.5V supply; VDDQ pins must match OPT pin state (3.3V if OPT = VDD, 2.5V if OPT = VSS). NC pins include A17L, A17R, and multiple reserved positions per pin map.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-200AXC and AS7C33256P-20JCIN, the 70T3599S200BC8 uniquely supports mixed-voltage I/O per port, pipelined output timing, and industrial temperature operation at 166MHz - making it the sole option for compact, low-power, high-bandwidth dual-processor memory sharing.

Availability

70T3599S200BC8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and avionics applications requiring stable component supply across extended product lifecycles.

Supply support for 70T3599S200BC8 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, specializes in high-performance timing, memory interface, and RF products for communications and computing markets.

The 70T35xx family was designed specifically for ultra-low-latency, high-bandwidth inter-processor communication in telecom, defense, and industrial control systems requiring true dual-port synchronous SRAM.

FAQ

What is the maximum operating frequency of the 70T3599S200BC8 and under what conditions?

The 70T3599S200BC8 achieves 200MHz operation (5ns cycle time) in commercial temperature range (0°C to +70°C). At industrial temperatures (-40°C to +85°C), it is rated for 166MHz (6ns cycle time). Both ratings assume proper power supply decoupling, VDD = 2.5V ±100mV, and VDDQ matched to OPT pin configuration (2.5V or 3.3V).

Does the 70T3599S200BC8 support independent voltage selection for each port's I/O interface?

Yes, the 70T3599S200BC8 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 OPTL = VSS (0V) configures it for 2.5V I/O with VDDQL = 2.5V. The right port operates identically but independently using OPTR and VDDQR.

How does the pipelined versus flow-through output mode affect system timing in the 70T3599S200BC8?

In pipelined mode (PL/FTX = VIH), the 70T3599S200BC8 adds one clock cycle latency to data output (tCD2 = 3.4ns at 200MHz) but enables tighter clock-to-clock timing margins. In flow-through mode (PL/FTX = VIL), data appears with zero-cycle latency (tCD1 = 10ns at 200MHz), increasing absolute access time but simplifying timing closure in systems with limited skew budget.

What is the function of the ZZL and ZZR pins on the 70T3599S200BC8, and how does sleep mode impact power consumption?

ZZL and ZZR are independent sleep mode enable inputs. When asserted high, each shuts down dynamic circuitry on its respective port while preserving JTAG functionality and static inputs (OPT, PL/FT). In sleep mode, the 70T3599S200BC8 draws ≤15mA total current - a >95% reduction compared to active 200MHz operation (375mA typical).

Is JTAG boundary-scan supported on the 70T3599S200BC8, and which package options include it?

Yes, the 70T3599S200BC8 supports IEEE 1149.1 JTAG boundary-scan with TCK, TMS, TDI, TDO, and TRST pins. JTAG is available in the 256-pin BGA (BC256) and 208-pin fpBGA (BF208) packages, but explicitly excluded from the 208-pin PQFP (DR208) due to pin count limitations per the datasheet note on page 4.