1 Mbit async SRAM, 10 ns — 5 V bus workhorse
The CY7C109D-10ZXIT is a 1 Mbit asynchronous SRAM organized as 128K x 8 bits, with a 10 ns access time across the full temperature range. The parallel interface and 10 ns write cycle time (word, page) mean the CPU can complete a read or write in a single bus cycle at clock rates up to 100 MHz, assuming the bus controller meets the setup/hold window.
Package and board integration
Housed in a 32-TSOP I (32-TFSOP, 0.724" body width, 18.40 mm), this is a standard thin small-outline package footprint shared across the CY7C109 family. The surface-mount profile suits automated pick-and-place; the 0.50 mm pin pitch requires a controlled-impedance layout if the bus traces run long, but for typical SRAM routing on a 4-layer board the signal integrity is straightforward. The -10ZXIT suffix indicates Tape & Reel packaging, which is the standard for volume production reels. The industrial temperature grade (-40°C to 85°C) covers most embedded, telecom, and industrial control environments without requiring a commercial-only part.
Infineon lists the CY7C109D-10ZXIT as Active (current production,). The base product number CY7C109 spans multiple speed and package variants, but the -10ZXIT is the current 10 ns TSOP I option. ROHS3 compliant per.