Renesas’ Timing product portfolio has been acquired by SiTime.
Datasheets, documentation, and sample orders remain available on Renesas.com through late 2026. For new designs, purchasing, support, and product inquiries, visit SiTime.com or send an email to SalesClocks@sitime.com. Full transition to SiTime is expected by late 2026.
| CAD Model: | View CAD Model |
| Pkg. Type: | SOIC |
| Pkg. Code: | DCG8 |
| Lead Count (#): | 8 |
| Pkg. Dimensions (mm): | 4.9 x 3.9 x 1.5 |
| Pitch (mm): | 1.27 |
| Moisture Sensitivity Level (MSL) | 1 |
| Pb (Lead) Free | Yes |
| ECCN (US) | EAR99 |
| HTS (US) | 8542.39.0090 |
| Lead Count (#) | 8 |
| Carrier Type | Tube |
| Moisture Sensitivity Level (MSL) | 1 |
| Qty. per Reel (#) | 0 |
| Qty. per Carrier (#) | 97 |
| Package Area (mm²) | 19.1 |
| Pkg. Dimensions (mm) | 4.9 x 3.9 x 1.5 |
| Core Voltage (V) | 2.5V, 3.3V, 5V, 5.5V |
| Freq. Accuracy Init. (± PPM) | 10 |
| Input Type | Crystal |
| Inputs (#) | 1 |
| Output Voltage (V) | 2.5V, 3.3V, 5V, 5.5V |
| Pitch (mm) | 1.27 |
| Pb (Lead) Free | Yes |
| Pb Free Category | e3 Sn |
| Temp. Range (°C) | -40 to 85°C |
| Country of Assembly | TAIWAN, THAILAND |
| Country of Wafer Fabrication | TAIWAN, USA |
| Advanced Features | 56-Byte NV RAM |
| Input Freq (KHz) | 32.768 - 32.768 |
| Input Freq (MHz) | 0.032768 - 0.032768 |
| Length (mm) | 4.9 |
| Longevity | 2040 Apr |
| MOQ | 388 |
| Output Banks (#) | 1 |
| Output Freq Range (KHz) | 0.001 - 0.001, 4.096 - 4.096, 8.192 - 8.192, 32.768 - 32.768 |
| Output Freq Range (MHz) | 1.0E-6 - 1.0E-6, 0.004096 - 0.004096, 0.008192 - 0.008192, 0.032768 - 0.032768 |
| Output Type | LVCMOS |
| Outputs (#) | 1 |
| Pkg. Type | SOIC |
| Power Consumption Typ (mW) | 10 |
| Price (USD) | $2.765 |
| Product Category | Real-Time Clocks, Real-Time Clocks |
| Prog. Clock | Yes |
| Prog. Interface | I2C |
| Requires Terms and Conditions | Does not require acceptance of Terms and Conditions |
| Tape & Reel | No |
| Thickness (mm) | 1.5 |
| Width (mm) | 3.9 |
| Xtal Freq (KHz) | 32.768 - 32.768 |
The 1338 is a serial real-time clock (RTC) device that consumes ultra-low power and provides a full binary-coded decimal (BCD) clock/calendar with 56 bytes of battery backed Non-Volatile Static RAM. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The clock operates in either the 24-hour or 12-hour format with AM/PM indicator. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year. Access to the clock/calendar registers is provided by an I2C interface capable of operating in fast I2C mode. Built-in Power-sense circuitry detects power failures and automatically switches to the backup supply, maintaining time and date operation.