Infineon Technologies CY7C1354B-166BGC

Overview

CY7C1354B-166BGC from Cypress Semiconductor is a 9-Mb (256K × 36) synchronous pipelined SRAM with NoBL™ architecture, designed for high-throughput memory subsystems in network switches and telecom line cards. It operates at 166 MHz with 3.5 ns clock-to-output delay, supports byte-write via four BW pins, uses separate VDDQ (2.5V/3.3V) for I/O, and features synchronous self-timed writes and JTAG boundary scan.

For engineers reviewing the CY7C1354B-166BGC datasheet, CY7C1354B-166BGC pinout, CY7C1354B-166BGC application, or CY7C1354B-166BGC equivalent, key selection criteria include burst order control (linear/interleaved), synchronous chip enable logic (CE1/CE2/CE3), ZZ sleep mode support, and compatibility with ZBT-style bus protocols requiring zero-wait-state back-to-back read/write transitions.

Technical Context

The CY7C1354B-166BGC implements fully registered pipelined operation: all address, control, and data inputs are latched on the rising edge of CLK (qualified by CEN), and all outputs pass through output registers synchronized to the same edge. Its NoBL™ logic eliminates bus latency by enabling consecutive read/write operations without wait states.

Burst addressing is controlled by ADV/LD and MODE pins: ADV/LD loads or increments an internal counter, while MODE selects linear or interleaved burst order using A0/A1. Write operations use synchronous self-timed circuitry, and output drivers are automatically three-stated during write data cycles to prevent bus contention.

Key Specifications

Pinout & Package

Package: 100-pin TQFP (Thin Quad Flat Package), 14 × 14 mm body, 0.5 mm pitch - suitable for high-density PCB layouts with standard reflow assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous pipelined SRAM applications.

Compared with IDT72V2115L16PF and IS61WV25636B, the CY7C1354B-166BGC uniquely delivers pipelined zero-wait-state operation with integrated burst control, JTAG testability, and deep-sleep power management-making it optimal for new high-speed communications hardware where timing determinism and power efficiency are co-prioritized.

Availability

CY7C1354B-166BGC is available at Aetrix Electronics and suitable for network packet buffering, telecom line card caching, baseband processor memory, and radar signal processing applications requiring stable component supply across extended product lifecycles.

Supply support for CY7C1354B-166BGC 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

Cypress Semiconductor (now part of Infineon Technologies) is a U.S.-based semiconductor company specializing in high-performance memory, microcontrollers, and programmable logic solutions for industrial and communications markets.

The CY7C1354B belongs to Cypress's NoBL™ SRAM product line, engineered specifically to replace ZBT SRAMs in bandwidth-constrained, low-latency systems such as packet-switched routers and wireless infrastructure equipment.

FAQ

What is the function of the MODE pin on CY7C1354B-166BGC?

The MODE pin is a strap input that selects burst addressing order: logic HIGH configures interleaved burst (A0/A1 toggle per beat), while logic LOW selects linear burst (sequential A0/A1 increment). It must be held static during operation and defaults HIGH if left floating, ensuring predictable burst behavior without external configuration registers.

How does the ZZ (Sleep) mode reduce power consumption?

When ZZ is asserted LOW, the CY7C1354B-166BGC disables internal clocks, shuts down I/O drivers, and places the memory array in ultra-low-power retention state while preserving stored data. This reduces standby current beyond the standard 35 mA CMOS spec-critical for intermittent-operation systems like remote radio units.

Can CY7C1354B-166BGC operate with 2.5V I/O while maintaining 3.3V core voltage?

Yes. The device uses separate VDDQ (I/O supply) and VDD (core supply) pins. VDDQ may be set to 2.5V or 3.3V independently, allowing direct interface with 2.5V FPGAs or processors while retaining full 3.3V core functionality and timing specifications-including 3.5 ns tCO and 166 MHz operation.

Is JTAG boundary scan supported on CY7C1354B-166BGC, and how is it enabled?

Yes, IEEE 1149.1 JTAG boundary scan is fully implemented. It is enabled by asserting TMS, applying TCK, and driving TDI with appropriate test vectors-no configuration register or mode pin is required. The TDO pin outputs scanned data on the falling edge of TCK, supporting automated PCB test and in-system verification.