Renesas 70T3519S133BF

Overview

70T3519S133BF 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 133MHz (7.5ns cycle time), supports selectable 2.5V or 3.3V I/O interfaces per port, and features pipelined/flow-through output modes, JTAG IEEE 1149.1 compliance, and industrial temperature range (–40°C to +85°C). It is used in real-time packet buffering for telecom line cards.

For engineers reviewing the 70T3519S133BF datasheet, 70T3519S133BF pinout, 70T3519S133BF application, or 70T3519S133BF equivalent, key selection criteria include dual-port latency tolerance, independent voltage scaling per port (2.5V/3.3V), pipelined vs. flow-through timing mode selection, collision/interrupt flag handling, and fpBGA-208 package compatibility with high-density routing constraints.

Technical Context

The 70T3519S133BF implements fully synchronous operation on both left and right ports with independent clock inputs (CLKL/CLKR), address strobes (ADSL/ADSR), and counter enable/repeat logic. Its dual-chip-enable architecture (CE0X/CE1X) enables depth expansion without external logic, while self-timed write control minimizes cycle time dependency on external timing margins.

It integrates dedicated collision detection and interrupt flag outputs (COLL/COLR, INTL/INTR), pipelined output mode with 1-cycle latency (tCD2 = 4.2ns max), and sleep mode control via ZZL/ZZR pins that disable dynamic inputs while preserving JTAG accessibility. The OPTL/OPTR pins configure VDDQX supply voltage level (2.5V or 3.3V) independently per port.

Key Specifications

Pinout & Package

70T3519S133BF is housed in a 208-pin fine-pitch Ball Grid Array (fpBGA) package designated BF208/BFG208, with 15mm × 15mm footprint and 0.8mm ball pitch. All VDD pins require 2.5V connection; VDDQL/VDDQR must match OPTL/OPTR configuration (2.5V if OPT = VSS, 3.3V if OPT = VDD).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-133BZXI and IDT70V27L15PF8, the 70T3519S133BF uniquely delivers per-port voltage selection, pipelined/flow-through mode switching, and hardware collision/interrupt signaling-enabling tighter timing budgets and simplified power architecture in heterogeneous SoC interconnects.

Availability

70T3519S133BF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, automotive ADAS, and high-performance computing applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for 70T3519S133BF 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 dual-port memory applications in network processors, DSP subsystems, and real-time control systems requiring deterministic access and robust multi-domain synchronization.

FAQ

What is the maximum operating frequency of the 70T3519S133BF at industrial temperature?

The 70T3519S133BF is rated for 133MHz operation across the full industrial temperature range (–40°C to +85°C), with guaranteed 7.5ns clock cycle time (tCYC2) and 4.2ns pipelined clock-to-data (tCD2) in this grade. This specification is validated per IDT datasheet DSC 5666/14 and applies to the BF208 fpBGA package.

Does the 70T3519S133BF support independent I/O voltage selection on left and right ports?

Yes, the 70T3519S133BF supports independent I/O voltage selection via OPTL and OPTR pins: setting OPTL = VDD (2.5V) configures the left port for 3.3V I/O levels with VDDQL = 3.3V, while OPTR = VSS (0V) sets the right port to 2.5V I/O with VDDQR = 2.5V. This enables mixed-voltage system integration without external level shifters.

How does collision detection work in the 70T3519S133BF?

The 70T3519S133BF asserts COLL (left port) or COLR (right port) when both ports attempt simultaneous write access to the same memory location. Detection occurs synchronously with the respective port's clock edge; flag deassertion requires completion of the conflicting access and one additional clock cycle (tCOLR = 4.2ns max). No software polling is needed-the flags drive external interrupt controllers directly.

What is the function of the REPEATL and REPEATR pins on the 70T3519S133BF?

REPEATL and REPEATR reset the internal address counter to the last valid address loaded via ADSL or ADSR, respectively. When asserted (VIH), they cause the counter to repeat the most recent address instead of incrementing-enabling efficient burst reads/writes without reloading the address bus. This feature reduces control logic overhead in sequential-access applications like FIFOs.

Is JTAG boundary scan supported on the 70T3519S133BF in the BF208 package?

Yes, JTAG boundary scan per IEEE 1149.1 is fully supported on the 70T3519S133BF in the BF208 fpBGA package, with dedicated TCK, TMS, TDI, TDO, and TRST pins. JTAG remains functional even during ZZL/ZZR sleep mode activation, enabling in-system debug and test without waking the memory core.