Datasheet Texas Instruments BQ4285
| Manufacturer | Texas Instruments |
| Series | BQ4285 |
RTC IC With 114x8 NVSRAM and NVSRAM Control
Datasheets
bq4285 - Real-Time Clock (RTC) With NVRAM Control datasheet
PDF, 1.6 Mb, Revision: A, File published: May 26, 2004
Prices
Status
| BQ4285P-SB2 | BQ4285S-SB2 | BQ4285S-SB2G4 | BQ4285S-SB2TR | |
|---|---|---|---|---|
| Lifecycle Status | Lifebuy (Manufacturer has announced that the device will be discontinued, and a lifetime-buy period is in effect) | Lifebuy (Manufacturer has announced that the device will be discontinued, and a lifetime-buy period is in effect) | Lifebuy (Manufacturer has announced that the device will be discontinued, and a lifetime-buy period is in effect) | Lifebuy (Manufacturer has announced that the device will be discontinued, and a lifetime-buy period is in effect) |
| Manufacture's Sample Availability | No | No | No | No |
Packaging
| BQ4285P-SB2 | BQ4285S-SB2 | BQ4285S-SB2G4 | BQ4285S-SB2TR | |
|---|---|---|---|---|
| N | 1 | 2 | 3 | 4 |
| Pin | 24 | 24 | 24 | 24 |
| Package Type | N | DW | DW | DW |
| Industry STD Term | PDIP | SOIC | SOIC | SOIC |
| JEDEC Code | R-PDIP-T | R-PDSO-G | R-PDSO-G | R-PDSO-G |
| Package QTY | 15 | 25 | 25 | 2000 |
| Carrier | TUBE | TUBE | TUBE | LARGE T&R |
| Device Marking | 4285P | 4285S | -SB2 | 4285S |
| Width (mm) | 13.71 | 7.5 | 7.5 | 7.5 |
| Length (mm) | 31.75 | 15.4 | 15.4 | 15.4 |
| Thickness (mm) | 4.57 | 2.35 | 2.35 | 2.35 |
| Pitch (mm) | 2.54 | 1.27 | 1.27 | 1.27 |
| Max Height (mm) | 5.08 | 2.65 | 2.65 | 2.65 |
| Mechanical Data | Download | Download | Download | Download |
Eco Plan
| BQ4285P-SB2 | BQ4285S-SB2 | BQ4285S-SB2G4 | BQ4285S-SB2TR | |
|---|---|---|---|---|
| RoHS | Compliant | Compliant | Compliant | Compliant |
| Pb Free | Yes |
Application Notes
- U-502 Time-Base Oscillator for RTC ICPDF, 313 Kb, File published: Sep 5, 1999
Time-Base Oscillator for RTC ICs.The operation of the time-base oscillator is critical to the timekeeping functions of the bq3285, bq4285, and bq4845 series of real-time-clocks (RTCs). This application note describes some basic characteristics of the piezoelectric crystal and the on-chip crystal oscillator circuitry designed into these RTC series. It also includes suggestions for achieving timek
Model Line
Series: BQ4285 (4)
Manufacturer's Classification
- Semiconductors> Clock and Timing> Real-time Clocks
