Infineon (formerly Cypress) lists the CY7C1399BN-15ZXCT as Obsolete. This part is no longer manufactured and is not available through the factory channel.
15 ns access time — timing budget fit
This speed grade suits 8-bit microcontroller and DSP designs with bus cycles in the 20–30 ns range, such as those using a 33–50 MHz system clock.
Package and temperature grade — board-fit constraints
Supplied as Tape & Reel (TR) for automated assembly. The device is housed in a 28-TSSOP (0.465", 11.80 mm width) package, with the supplier device package designated 28-TSOP I. This is a surface-mount, thin small-outline package with a standard 0.65 mm pitch.