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ht8563armz

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HTCSEMI Real-time Clocks (RTC), MSOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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HT8563ARMZ

HTCSEMI · Real-time Clocks (RTC) · MSOP-8

HT8563ARMZ from HTCSEMI, in a MSOP-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 OSCI input Oscillator input pin for the external 32.768 kHz quartz resonator. Can also be driven directly from an external oscillator (leave OSCO open in that case). Internal load capacitance ~12 pF; recommended crystal RS <= 40 kOhm, CL = 8 nF (or 12.5 pF per dynamic table).
2 OSCO output Oscillator output pin for the 32.768 kHz quartz resonator. Left unconnected when the device is driven from an external oscillator on OSCI.
3 INT output Active-low interrupt output, asserted on alarm match or timer countdown reaching zero (per Control Register 2 configuration). Open-drain-style output; requires an external pull-up. IOL = 1 mA at VOL = 0.4 V, VDD = 5 V.
4 VSS power_in Ground / common return pin (0 V reference).
5 SDA bidirectional I2C serial data line, bidirectional. Open-drain output; external pull-up resistor to VDD required. Compatible with 400 kHz Fast-mode I2C; input high >= 0.7VDD, input low <= 0.3VDD.
6 SCL input I2C serial clock input from master, used to synchronize serial data transfer. Cycle frequency 0-400 kHz. VIH >= 0.7VDD, VIL <= 0.3VDD.
7 CLKOUT output Programmable frequency divider (orthogonal signal) output. Selectable 32.768 kHz / 8.192 kHz / 4.096 kHz / 1 Hz via FD0/FD1; enabled by FE bit. Open-drain output requiring an external pull-up resistor. IOL/IOH = 1 mA at VDD = 5 V.
8 VDD power_in Positive supply voltage input. Operating range 1.0-5.5 V (I2C access guaranteed for VDD >= 1.8 V). Absolute maximum -0.5 V to +6.5 V. Typical IDD = 800 uA at 400 kHz I2C active; ~0.45 uA in non-active mode at 2 V.

Key specifications

Parameter Value
Manufacturer HTCSEMI
Package MSOP-8
Category RTC
Pins 8

Ordering variants

Same part, different packaging or reel option.

  • HT8563ARMZ
  • HT8563ANZ
  • HT8563ARZ
  • HT8563ARQZ

CAD (KiCad official)

  • Symbol: HT8563ARMZ
  • Footprint: Package_SO:MSOP-8_3x3mm_P0.65mm
  • 3D model: MSOP-8 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: HTCSEMI datasheet (14 pp, sha256 654c0bd082da30c3, 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

Symbol & Footprint

Schematic Symbol

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PCB Footprint

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Datasheet

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