IS25WP016D-JULE-TR from ISSI Integrated Silicon Solution, in a USON-8-EP(2x3). 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	CE#	input	Chip Enable (active-low). Drives the device active when low; when high, the device is deselected and outputs are high-Z with core in standby. Must transition high→low after power-up before accepting a new instruction.
2	SO(IO1)	bidirectional	Serial Data Output in Standard SPI mode; becomes bidirectional IO1 in Dual/Quad SPI and QPI modes. Data is clocked out on the falling edge of SCK in standard SPI.
3	WP#(IO2)	bidirectional	Write Protect (active-low) in Standard/Dual SPI: gates Status Register writes together with SRWD bit. Becomes IO2 in Quad SPI / QPI when the QE bit of Status Register is set to 1.
4	GND	power_in	Ground reference. Connect to system ground referenced to Vcc.
5	SI(IO0)	bidirectional	Serial Data Input in Standard SPI mode; becomes bidirectional IO0 in Dual/Quad SPI and QPI modes. Data clocked in on rising edge of SCK in standard SPI.
6	SCK	input	Serial Clock. Synchronizes input/output timing; supports SPI modes (0,0) and (1,1) up to 133MHz, and DTR up to 66MHz using both clock edges.
7	HOLD#/RESET#(IO3)	bidirectional	Multi-function pin selectable as HOLD# (default, P7=0 in Read Register) or RESET# (P7=1) when QE=0; becomes IO3 in Quad SPI / QPI when QE=1. HOLD# pauses serial communication when low with CE# low (SO goes high-Z). RESET# active-low returns device to reset state (High-Z outputs).
8	Vcc	power_in	Device core power supply. IS25WP variant: 1.65V to 1.95V. Typical 4mA active read current, 5µA standby, 1µA deep power-down.

Key specifications

Parameter	Value
Manufacturer	ISSI Integrated Silicon Solution
Package	USON-8-EP(2x3)
Category	Memory
Pins	8

Ordering variants

Same part, different packaging or reel option.

IS25WP016D-JULE-TR
IS25WP016D-JULE-TRB
IS25WP016D-JULE-TRN
IS25WP016D-JULE-TRV
IS25WP016D-JULE-TRT
IS25WP016D-JULE-TRK
IS25WP016D-JULE-TRL
IS25WP016D-JULE-TRM
IS25WP016D-JULE-TRG
IS25WP016D-JULE-TRH

CAD (KiCad official)

Symbol: IS25WP016D-JULE-TR
Footprint: Package_SON:Winbond_USON-8-1EP_3x2mm_P0.5mm_EP0.2x1.6mm
3D model: USON-8-EP(2x3) (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`is25wp016d-jule-tr.step`	106 KB	You want the bare part, or you mark your own boards.
`is25wp016d-jule-tr-etched.step`	2.7 MB	You want the part with `IS25WP016D-JULE-TR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 682 faces against 62 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: ISSI Integrated Silicon Solution datasheet (115 pp, sha256 b7472bc6861b38f4, 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