54 ns access time on a 56 MHz bus — what it buys you
The S29CD016J0MFAM010 is a 16Mbit parallel NOR flash from Infineon's CD-J series, organized as 512K x 32 bits. Its 54 ns access time and 56 MHz clock rate mean the memory controller can perform synchronous burst reads with zero wait states on most 32-bit MCU/FPGA buses operating up to 56 MHz. The wide supply range (1.65V to 2.75V) lets it run directly from a 1.8V or 2.5V rail without a separate regulator, simplifying the power tree in space-constrained designs.
The 54 ns access time holds across the full temperature range, so timing closure at 125°C is the same as at 25°C — no derating needed for read cycles.
Parallel interface, 32-bit data bus
The 512K x 32 organization gives a full 32-bit word per read cycle, matching the native bus width of ARM Cortex-M or RISC-V MCUs without byte-lane multiplexing. Write cycle time per word or page is 60 ns, allowing fast firmware updates or parameter storage. The memory is non-volatile NOR flash, so it supports execute-in-place (XIP) for boot code — no need to shadow to RAM first.
Note that it is RoHS non-compliant (per the supplier), so it is not suitable for new designs requiring RoHS exemption-free compliance. For RoHS-compliant alternatives in the same density, consider the S29AL016J70BFI023 (70 ns, 2.7V min, -40 to 85°C) or the S26KS128SDPBHV020 (128Mbit, 166 MHz HyperFlash).