ZD25WQ16CSIGT

@@ -0,0 +1,61 @@+# ZD25WQ16CSIGT++**Zetta** · NOR FLASH · SOP-8-208mil++ZD25WQ16CSIGT from Zetta, in a SOP-8-208mil. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | CS# | input | Chip Select input, active-low. Drive low to enable the device and clock in commands on SCLK; drive high to deselect and place SO/IOx in high-Z. |+| 2 | SO/IO1 | bidirectional | Standard SPI serial data output (SO). In Dual/Quad SPI and QPI modes this pin becomes bidirectional IO1. Data is shifted out on the falling edge of SCLK in standard SPI. |+| 3 | WP#/IO2 | bidirectional | Write Protect input in Standard/Dual SPI mode (active-low; works with SRP0/SRP1 to hardware-protect the Status Register). In Quad SPI/QPI mode, and when the non-volatile QE bit is set to 1, this pin becomes bidirectional IO2 and the WP# function is disabled. |+| 4 | VSS | power_in | Device ground reference (0 V). Connect to the system ground plane. |+| 5 | SI/IO0 | bidirectional | Standard SPI serial data input (SI) - commands, addresses, and write data are latched on the rising edge of SCLK. In Dual/Quad SPI and QPI modes this pin becomes bidirectional IO0. |+| 6 | SCLK | input | Serial Clock input. Provides the timing for all serial input/output; supports SPI mode 0 (CPOL=0, CPHA=0) and mode 3 (CPOL=1, CPHA=1) up to 104 MHz for fast read. |+| 7 | HOLD#/IO3 | bidirectional | Hold input in Standard/Dual SPI mode (active-low; while CS# is low, driving HOLD# low pauses serial communication and forces SO to high-Z without deselecting the device). In Quad SPI/QPI mode, and when the non-volatile QE bit is set to 1, this pin becomes bidirectional IO3. |+| 8 | VCC | power_in | Device power supply, 1.65 V to 3.6 V single-supply operation for read, program, and erase. Decouple locally to VSS with a low-ESR capacitor. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Zetta |+| Package | SOP-8-208mil |+| Category | Memory |+| Pins | 8 |++## Ordering variants++- `ZD25WQ16CSIGTCSIGT`+- `ZD25WQ16CSIGTCSIGR`+- `ZD25WQ16CSIGTCSIGY`+- `ZD25WQ16CSIGTCTIGT`+- `ZD25WQ16CSIGTCTIGR`+- `ZD25WQ16CSIGTCTIGY`+- `ZD25WQ16CSIGTCOIGT`+- `ZD25WQ16CSIGTCOIGR`+- `ZD25WQ16CSIGTCOIGY`+- `ZD25WQ16CSIGTCUIGT`+- `ZD25WQ16CSIGTCUIGR`+- `ZD25WQ16CSIGTCUIGY`+- `ZD25WQ16CSIGTCEIGT`+- `ZD25WQ16CSIGTCEIGR`+- `ZD25WQ16CSIGTCEIGY`++## CAD (KiCad official)++- Symbol: `ZD25WQ16CSIGT`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOP-8-208mil (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Zetta datasheet](docs/zd25wq16csigt-datasheet.pdf) (87 pp, sha256 `bfa49c113191080d`, retrieved 2026-08-17, tier: lcsc)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/zd25wq16csigt-datasheet.pdf)

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