56-TSOP footprint and board integration
The S29GL128P10TFI020 comes in a 56-TSOP package (0.724", 18.40 mm width) — a surface-mount footprint that routes the 16-bit data bus and address lines on a single layer if the layout is tight.
100 ns access and supply rail fit
With a 100 ns access time, this part delivers a read cycle every 100 ns on the parallel interface — that's a 10 MHz bus clock ceiling for random reads. The 128 Mbit density is organized as 16 M x 8 — a byte-wide bus that suits 8-bit microcontrollers or as a boot device for a 32-bit processor if you pair two parts for a 16-bit word. The write cycle time (word/page) is also 100 ns, so page programming at 8-word bursts keeps the firmware update time reasonable.
Pin-compatible alternative: GL-S sibling
The S29GL128S10TFIV13 (GL-S series) is a pin-compatible drop-in for the same 56-TSOP footprint — same density, same access time, but it runs on a 1.65 V core supply and offers a 60 ns write cycle. If your board already has a 1.8 V rail, the GL-S part saves a 3.3 V regulator and speeds up page writes. The trade-off is the package variant: the GL-S ships in tape-and-reel, while the GL-P comes in a tray.