Infineon Technologies CY7C1059DV33-10ZSXIT

Overview

CY7C1059DV33-10ZSXIT from Infineon Technologies (formerly Cypress) is a 8-Mbit (1M × 8) high-speed CMOS static RAM with 10 ns access time, 3.3 V supply, TTL-compatible I/O, and automatic CE-controlled power-down. It operates across –40 °C to +85 °C, supports easy memory expansion via CE/OE/WE control, and is used in industrial embedded controllers requiring fast, low-power volatile storage.

For engineers reviewing the CY7C1059DV33-10ZSXIT datasheet, CY7C1059DV33-10ZSXIT pinout, CY7C1059DV33-10ZSXIT application, or CY7C1059DV33-10ZSXIT equivalent, key selection criteria include tAA ≤ 10 ns, ISB2 = 20 µA (CMOS standby), VCC = 3.3 V ± 0.3 V, 44-pin TSOP-II package with center power/ground pinout, and data retention down to 2.0 V.

Technical Context

The CY7C1059DV33-10ZSXIT implements a fully static 1M × 8 memory array with asynchronous random access, using tri-state bidirectional I/Os (I/O0–I/O7) and address decoding across A0–A19. Its control logic relies on three independent active-low enables: CE (chip select), OE (output enable), and WE (write enable), enabling precise bus arbitration and multi-chip expansion without external glue logic.

Power management is handled internally: when CE is HIGH, the device enters automatic CMOS standby mode (ISB2 = 20 µA), and retains data at VCC ≥ 2.0 V. The 44-pin TSOP-II package features center VCC/VSS pins for improved signal integrity and reduced ground bounce in high-speed parallel bus systems.

Key Specifications

Pinout & Package

44-pin Thin Small Outline Package (TSOP-II), 10.16 mm × 18.4 mm body, 0.8 mm lead pitch, center power/ground configuration (VCC and VSS located near pin 31 and pin 32 respectively).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed parallel SRAM applications.

Compared with AS7C31025B-10TIN and IS61LV10248-10ML, the CY7C1059DV33-10ZSXIT uniquely combines 10 ns speed, 20 µA CMOS standby, 2.0 V data retention, and center-pin TSOP-II in a single industrial-grade part-making it optimal for safety-critical, battery-aware, or thermally constrained embedded systems.

Availability

CY7C1059DV33-10ZSXIT is available at Aetrix Electronics and suitable for industrial PLCs, medical imaging subsystems, avionics data loggers, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CY7C1059DV33-10ZSXIT 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

Infineon Technologies is a global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive ICs, and memory solutions acquired through its 2020 acquisition of Cypress Semiconductor.

This device belongs to the Cypress legacy parallel SRAM product line, designed specifically for high-reliability industrial and aerospace applications demanding deterministic timing, low-power standby, and robust data retention under voltage stress.

FAQ

Is CY7C1059DV33-10ZSXIT pin-compatible with earlier CY7C1059DV33 variants?

Yes. The -10ZSXIT suffix denotes the same 44-pin TSOP-II package, industrial temperature grade (–40 °C to +85 °C), and 10 ns speed grade as the base CY7C1059DV33-10, with identical pinout and electrical behavior per Infineon's continuity documentation. No layout changes are required for migration.

Does this SRAM support byte-wide writes?

No. The CY7C1059DV33-10ZSXIT has eight bidirectional I/O lines (I/O0–I/O7) but no individual byte-write enable signals. All eight bits are written simultaneously when CE and WE are asserted; partial writes require external masking logic or software handling.

What is the maximum sustained operating frequency for continuous reads?

The device supports continuous read cycles at up to 100 MHz, derived from tRC = 10 ns minimum read cycle time. This assumes stable 3.3 V supply, proper termination, and adherence to AC timing parameters including tOHA ≥ 2.5 ns and tHZOE ≤ 6 ns.

Can CY7C1059DV33-10ZSXIT be used with 5 V tolerant controllers?

No. Its inputs are rated for –0.3 V to VCC + 0.3 V (i.e., max 3.6 V at VCC = 3.3 V). Direct connection to 5 V logic violates absolute maximum ratings and risks latch-up. A level-shifter or voltage translator is mandatory for interfacing with 5 V systems.