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ht24c256arz
Public Unreviewedby Ray
HTCSEMI EEPROM, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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README
markdownHT24C256ARZ
HTCSEMI · EEPROM · SOP-8
HT24C256ARZ from HTCSEMI, in a SOP-8. 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 | A0 | input | Device address input bit 0. Hard-wired to VSS or VCC to set the least significant bit of the I2C slave address; if left floating it is internally read as VSS (low). Up to eight HT24C256A devices can share one 2-wire bus by using unique A0/A1/A2 combinations. |
| 2 | A1 | input | Device address input bit 1. Hard-wired to VSS or VCC to set the second I2C slave address bit; if left floating it is internally read as VSS (low). |
| 3 | A2 | input | Device address input bit 2. Hard-wired to VSS or VCC to set the most significant of the three slave address bits; if left floating it is internally read as VSS (low). |
| 4 | VSS | power_in | Negative power supply / ground reference (0V). |
| 5 | SDA | bidirectional | Serial data input/output for the 2-wire (I2C) interface. Open-drain output that requires an external pull-up resistor to VCC; may be wired-OR with other open-drain devices on the bus. Input high VIH = 0.7VCC min, input low VIL = 0.3VCC max; VOL = 0.4V max at IOL = 2.1mA (VCC = 2.4V). |
| 6 | SCL | input | Serial clock input for the 2-wire (I2C) interface. Data is clocked into the EEPROM on the positive edge and clocked out on the negative edge. Maximum clock frequency is 400kHz at VCC = 1.8V-5.0V and 1MHz at VCC = 2.5V-5.0V. |
| 7 | WP | input | Write protect input. When tied to VCC, the entire 256K memory array is write-protected (read-only). When tied to VSS or left floating, normal read/write operations are permitted. |
| 8 | VCC | power_in | Positive power supply, 1.8V to 5.5V over the -40°C to +85°C operating range. Operating current is 2mA max (read) / 5mA max (write) at 5V, 400kHz; standby current is 3μA max at 5V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HTCSEMI |
| Package | SOP-8 |
| Category | Memory |
| Pins | 8 |
Ordering variants
HT24C256ARZHT24C256ARZHT24C256ANZHT24C256ARZHT24C256ARTZHT24C256ARZHT24C256ARMZHT24C256ARZHT24C256ARDZ
CAD (KiCad official)
- Symbol:
HT24C256ARZ - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HTCSEMI datasheet (None pp, sha256
ff05e910121cb10d, 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).