Voltage and density family
Treat GD25Q64H as 3 V Q-family at 64 Mb. Do not substitute a similarly numbered 1.2 V, 1.8 V, wide-VCC or 3 V device without checking the exact operating range.
Manufacturer model / selection entry
GD25Q64H is a 64 Mb member of GigaDevice’s 3 V Q-family. This member page narrows electrical and command-set selection, but a package and temperature suffix is still required for ordering.
Buyer and engineer answers
Statements below are scoped to the named manufacturer source. Commercial availability is deliberately separate.
Treat GD25Q64H as 3 V Q-family at 64 Mb. Do not substitute a similarly numbered 1.2 V, 1.8 V, wide-VCC or 3 V device without checking the exact operating range.
The 64 Mb density must be checked together with erase geometry, address behavior and the host command set. Security registers, protection behavior, DTR/STR support and maximum clock are revision-specific and must come from the exact GigaDevice document.
The visible member name is not the complete sellable SKU. Package, temperature grade and packing characters must be selected from the current order-information table; H revision and package suffix remains an explicit publication check.
Publication safeguard
Do not publish this member as an orderable SKU until H revision and package suffix, package, temperature and packing fields are bound to current GigaDevice evidence.
Procurement FAQ
Compatibility answers remain conditional where the source evidence does not establish a direct replacement.
No. Confirm the package, temperature and packing suffix shown by the current manufacturer ordering table.
Equal density is insufficient. Compare voltage, commands, status/security registers, address mode, timing, package and pinout.
Availability, date code, package suffix and unit price are attached only to a reviewed quotation for the complete code.