Renesas 70T633S10BFG8

Overview

70T633S10BFG8 from Integrated Device Technology is a high-speed 512K × 18-bit asynchronous dual-port static RAM with true simultaneous access, 10 ns max read cycle time, single 2.5 V core supply, and selectable 3.3 V/2.5 V I/O interface per port. It enables full-speed 36-bit+ memory expansion in master/slave configurations for real-time inter-processor communication systems.

For engineers reviewing the 70T633S10BFG8 datasheet, 70T633S10BFG8 pinout, 70T633S10BFG8 application, or 70T633S10BFG8 equivalent, key selection criteria include dual-port arbitration logic, RapidWrite Mode timing compliance, JTAG IEEE 1149.1 support in BGA-208, industrial temperature range (–40°C to +85°C), and independent port voltage configuration via OPTL/OPTR pins.

Technical Context

This device implements fully asynchronous dual-port architecture with on-chip semaphore signaling and port arbitration logic, allowing concurrent read/write operations to the same memory location without external logic. Each port features independent CE0/CE1 enables, R/W control, byte-select (UB/LB), and sleep mode (ZZ) inputs.

It supports three operational modes: standard dual-port RAM access (CE = L, SEM = H), semaphore flag access (CE = H, SEM = L), and RapidWrite Mode-where back-to-back writes are enabled by holding R/W low across address transitions while meeting tAAS ≤ 1 ns and tARF ≥ 1.5 V/ns.

Key Specifications

Pinout & Package

70T633S10BFG8 is packaged in a 208-ball fine-pitch BGA (BFG208) with 0.8 mm ball pitch and 15 mm × 15 mm body size. All VDD pins require 2.5 V; VDDQ pins must match OPT pin state (3.3 V if OPT = VDD, 2.5 V if OPT = VSS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-10ZXC and IS61WV102418BLL-10QLI, the 70T633S10BFG8 delivers unique value through its 512K × 18 density, per-port I/O voltage flexibility, RapidWrite Mode, and industrial-grade JTAG - making it optimal for high-reliability, mixed-voltage, real-time embedded systems.

Availability

70T633S10BFG8 is available at Aetrix Electronics and suitable for real-time inter-processor communication, digital signal processing buffering, and telecom line card applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for 70T633S10BFG8 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 IDT70T633 family was designed specifically for high-performance, low-latency shared memory applications in multi-processor systems - emphasizing hardware arbitration, mixed-voltage interoperability, and IEEE 1149.1 testability.

FAQ

What is the maximum operating frequency supported by the 70T633S10BFG8?

The 70T633S10BFG8 does not operate at a clock frequency but is specified by access time: its 10 ns maximum read cycle time (tRC) corresponds to a theoretical peak throughput of 100 MHz for consecutive random accesses. Actual system bandwidth depends on bus protocol, address stability, and output enable timing - all guaranteed under the AC electrical specifications in the datasheet.

Does the 70T633S10BFG8 support both 2.5 V and 3.3 V I/O levels simultaneously on different ports?

Yes, the 70T633S10BFG8 supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL = VDD (2.5 V) configures the left port for 3.3 V I/O, while setting OPTR = VSS (0 V) configures the right port for 2.5 V I/O - enabling direct interfacing with heterogeneous logic families without level shifters.

How does the RapidWrite Mode function in the 70T633S10BFG8, and what design constraints apply?

RapidWrite Mode in the 70T633S10BFG8 allows consecutive write operations without toggling R/W, CE, or byte enables between addresses. It requires tAAS ≤ 1 ns (address skew) and tARF ≥ 1.5 V/ns (address slew rate). The write cycle end is defined by the final address transition - not R/W deassertion - reducing control logic complexity in high-speed systems.

What is the role of the M/S pin in the 70T633S10BFG8, and how does it affect BUSY functionality?

The M/S pin configures port arbitration behavior: when M/S = VIH, the device operates as Master and BUSY is an output flag indicating internal contention; when M/S = VIL, it operates as Slave and BUSY becomes an input used to synchronize with the Master. This enables hierarchical, hardware-managed memory access in cascaded multi-device systems.

Is JTAG boundary scan available on the 70T633S10BFG8, and which package options support it?

Yes, JTAG boundary scan compliant with IEEE 1149.1 is fully supported on the 70T633S10BFG8. It is explicitly documented for the BGA-208 (BFG208) and BGA-256 packages. The 70T633S10BFG8 uses the BFG208 package, confirming full JTAG functionality including TCK, TMS, TDI, TDO, and TRST pins with 10 MHz TCK operation.