component
HT1302ANZ
Public Made by Adomby adom
HTCSEMI Real-time Clocks (RTC), DIP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdownHT1302ANZ
HTCSEMI · Real-time Clocks (RTC) · DIP-8
HT1302ANZ from HTCSEMI, in a DIP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VCC2 | power_in | Primary power supply pin in dual-supply configuration; the device operates from the larger of VCC1 or VCC2, and VCC2 powers it when VCC2 is greater than VCC1 + 0.2V (supply range 2.0V to 5.5V). |
| 2 | X1 | passive | Connection for a standard 32.768kHz quartz crystal with 6pF load capacitance, or input for an external 32.768kHz oscillator signal. |
| 3 | X2 | passive | Connection for a standard 32.768kHz quartz crystal with 6pF load capacitance; left floating when X1 is driven by an external oscillator. |
| 4 | GND | power_in | Ground. |
| 5 | CE | input | Chip enable input that must be asserted high during a read or write, with an internal 40kΩ (typ) pulldown resistor to ground; formerly called RST. |
| 6 | I/O | bidirectional | Bidirectional data pin (input/push-pull output) for the 3-wire interface, with an internal 40kΩ (typ) pulldown resistor to ground. |
| 7 | SCLK | input | Serial clock input that synchronizes data movement on the serial interface, with an internal 40kΩ (typ) pulldown resistor to ground. |
| 8 | VCC1 | power_in | Low-power operation and battery backup supply pin (2.0V to 5.5V); the rechargeable energy source connects here when the trickle charger is used, and it is UL recognized against reverse charging current with a lithium battery. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HTCSEMI |
| Package | DIP-8 |
| Category | Clock and Timing |
| Pins | 8 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply Voltage | VCC1, VCC2 | 2 | 3.3 | 5.5 | V | Notes 2, 10 | 10 |
| Logic 1 Input | VIH | 2 | V | Note 2; max printed as VCC + 0.3 V | 10 | ||
| Logic 0 Input | VIL | -0.3 | 0.3 | V | VCC = 2.0V | 10 | |
| Logic 0 Input | VIL | -0.3 | 0.8 | V | VCC = 5V (Note 2) | 10 | |
| Voltage Range on Any Pin Relative to Ground | -0.5 | 7 | V | 10 | |||
| Operating Temperature Range, Commercial | 0 | 70 | °C | 10 | |||
| Operating Temperature Range, Industrial | -40 | 85 | °C | IND | 10 | ||
| Storage Temperature Range | -55 | 125 | °C | 10 | |||
| Logic 1 Output | VOH | 1.6 | V | IOH = -0.4mA, VCC = 2.0V | 10 | ||
| Logic 1 Output | VOH | 2.4 | V | IOH = -1.0mA, VCC = 5V (Note 2) | 10 | ||
| Logic 0 Output | VOL | 0.4 | V | IOL = 1.5mA, VCC = 2.0V | 10 | ||
| Input Leakage | ILI | 85 | 500 | μA | Notes 5, 13 | 10 | |
| I/O Leakage | ILO | 85 | 500 | μA | Notes 5, 13 | 10 | |
| Active Supply Current (Oscillator Enabled) | ICC1A | 0.4 | mA | VCC1 = 2.0V, CH = 0 (Notes 4, 11) | 10 | ||
| Active Supply Current (Oscillator Enabled) | ICC1A | 1.2 | mA | VCC1 = 5V, CH = 0 (Notes 4, 11) | 10 | ||
| Timekeeping Current (Oscillator Enabled) | ICC1T | 0.2 | 0.3 | μA | VCC1 = 2.0V, CH = 0 (Notes 3, 11, 13) | 10 | |
| Timekeeping Current (Oscillator Enabled) | ICC1T | 0.45 | 1 | μA | VCC1 = 5V, CH = 0 (Notes 3, 11, 13) | 10 | |
| Standby Current (Oscillator Disabled) | ICC1S | 1 | 100 | nA | VCC1 = 2.0V, CH = 1 (Notes 9, 11, 13) | 10 | |
| Standby Current (Oscillator Disabled), IND | ICC1S | 5 | 200 | nA | IND, CH = 1 (Notes 9, 11, 13) | 10 | |
| Active Supply Current (Oscillator Enabled) | ICC2A | 0.425 | mA | VCC2 = 2.0V, CH = 0 (Notes 4, 12) | 10 | ||
| Active Supply Current (Oscillator Enabled) | ICC2A | 1.28 | mA | VCC2 = 5V, CH = 0 (Notes 4, 12) | 10 | ||
| Timekeeping Current (Oscillator Enabled) | ICC2T | 25.3 | μA | VCC2 = 2.0V, CH = 0 (Notes 3, 12) | 10 | ||
| Timekeeping Current (Oscillator Enabled) | ICC2T | 81 | μA | VCC2 = 5V, CH = 0 (Notes 3, 12) | 10 | ||
| Standby Current (Oscillator Disabled) | ICC2S | 25 | μA | VCC2 = 2.0V, CH = 1 (Notes 9, 12) | 10 | ||
| Standby Current (Oscillator Disabled) | ICC2S | 80 | μA | VCC2 = 5V, CH = 1 (Notes 9, 12) | 10 | ||
| Trickle-Charge Resistor R1 | R1 | 2 | kΩ | 10 | |||
| Trickle-Charge Resistor R2 | R2 | 4 | kΩ | 10 | |||
| Trickle-Charge Resistor R3 | R3 | 8 | kΩ | 10 | |||
| Trickle-Charge Diode Voltage Drop | VTD | 0.7 | V | 10 | |||
| Input Capacitance | CI | 10 | pF | TA = +25°C | 11 | ||
| I/O Capacitance | CI/O | 15 | pF | TA = +25°C | 11 | ||
| Data to CLK Setup | tDC | 200 | ns | VCC = 2.0V | 11 | ||
| Data to CLK Setup | tDC | 50 | ns | VCC = 5V (Note 6) | 11 | ||
| CLK to Data Hold | tCDH | 280 | ns | VCC = 2.0V | 11 | ||
| CLK to Data Hold | tCDH | 70 | ns | VCC = 5V (Note 6) | 11 | ||
| CLK to Data Delay | tCDD | 800 | ns | VCC = 2.0V | 11 | ||
| CLK to Data Delay | tCDD | 200 | ns | VCC = 5V (Notes 6, 7, 8) | 11 | ||
| CLK Low Time | tCL | 1000 | ns | VCC = 2.0V | 11 | ||
| CLK Low Time | tCL | 250 | ns | VCC = 5V (Note 6) | 11 | ||
| CLK High Time | tCH | 1000 | ns | VCC = 2.0V | 11 | ||
| CLK High Time | tCH | 250 | ns | VCC = 5V (Note 6) | 11 | ||
| CLK Frequency | tCLK | 0.5 | MHz | VCC = 2.0V | 11 | ||
| CLK Frequency | tCLK | 0 | 2 | MHz | VCC = 5V (Note 6); min printed as DC | 11 | |
| CLK Rise and Fall | tR, tF | 2000 | ns | VCC = 2.0V | 11 | ||
| CLK Rise and Fall | tR, tF | 500 | ns | VCC = 5V | 11 | ||
| CE to CLK Setup | tCC | 4 | μs | VCC = 2.0V | 11 | ||
| CE to CLK Setup | tCC | 1 | μs | VCC = 5V (Note 6) | 11 | ||
| CLK to CE Hold | tCCH | 240 | ns | VCC = 2.0V | 11 | ||
| CLK to CE Hold | tCCH | 60 | ns | VCC = 5V (Note 6) | 11 | ||
| CE Inactive Time | tCWH | 4 | μs | VCC = 2.0V | 11 | ||
| CE Inactive Time | tCWH | 1 | μs | VCC = 5V (Note 6) | 11 | ||
| CE to I/O High Impedance | tCDZ | 280 | ns | VCC = 2.0V | 11 | ||
| CE to I/O High Impedance | tCDZ | 70 | ns | VCC = 5V (Note 6) | 11 | ||
| SCLK to I/O High Impedance | tCCZ | 280 | ns | VCC = 2.0V | 11 | ||
| SCLK to I/O High Impedance | tCCZ | 70 | ns | VCC = 5V (Note 6) | 11 | ||
| Thermal Resistance Junction-Ambient, 8 DIP | THETA-JA | 110 | °C/W | 8 DIP | 12 | ||
| Thermal Resistance Junction-Case, 8 DIP | THETA-JC | 40 | °C/W | 8 DIP | 12 |
CAD (KiCad official)
- Symbol:
HT1302ANZ - Footprint:
Package_DIP:DIP-8_W7.62mm - 3D model: DIP-8 (KiCad packages3D, STEP)
- 3D model files:
ht1302anz-etched.step/ht1302anz-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ht1302anz.step/ht1302anz.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HTCSEMI datasheet (13 pp, sha256
8af75ca678de881f, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).