DP8571AN Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
DP8571AN is a real-time clock IC from Texas Instruments with an 8-bit parallel bus interface and 32 kHz crystal oscillator. It features 16-bit timers, 4 programmable modes, interrupt capability, and power-fail input in a 24-pin PDIP package.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 24
- Lifecycle
- OBSOLETE
- Datasheet
- DP8571AN Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Non-compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Real-time clock with 32 kHz (0.032 MHz) crystal oscillator and prescaled output for accurate timekeeping
- 8-bit parallel direct-address bus interface with 16-bit timer resolution and interrupt capability for embedded controllers
- 4 programmable timer modes with power-fail input for bus lockout, ensuring data integrity during power interruptions
Applications
DP8571AN is used in industrial control systems, data loggers, and embedded computing platforms that require precise real-time timekeeping with 4 programmable timer modes and interrupt-driven scheduling. Its parallel 8-bit bus interface and power-fail input make it suitable for legacy process controllers, alarm systems, and battery-backed clocking applications where bus lockout during power loss is critical.
Specifications
| Reach Compliance Code | Unknown |
| YTEOL | 0 |
| Additional Feature | 4 PROGRAMMABLE MODES FOR TIMER; PRESCALED XTAL OSC OUTPUT FOR TIMER; POWER FAIL I/P FOR BUS LOCK-OUT |
| Clock Frequency-Max | 0.032MHz |
| External Data Bus Width | 8 |
| Information Access Method | PARALLEL, DIRECT ADDRESS |
| Interrupt Capability | Y |
| JESD-30 Code | R-PDIP-T24 |
| JESD-609 Code | e0 |
| Number of Bits | 16 |
| On Chip Data RAM Width | 8 |
| Output Clock Frequency-Max | 2.4576MHz |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP24,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Qualification Status | Not Qualified |
| RAM (words) | 44 |
| Supply Current-Max | 20mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 4.5V |
| Supply Voltage-Nom | 5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | TIN LEAD |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Time-Min | 1/100 SECOND |
| Volatile | YES |
| uPs/uCs/Peripheral ICs Type | TIMER, REAL TIME CLOCK |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Non-compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What oscillator frequency and timer resolution does the DP8571AN provide?
The DP8571AN uses a 32 kHz (0.032 MHz) crystal oscillator and provides 16-bit timer resolution across 4 programmable modes, enabling precise interval timing and scheduling in embedded systems that require accurate real-time clock functions with interrupt capability.
How does the power-fail input on the DP8571AN protect data integrity?
The DP8571AN includes a dedicated power-fail input that activates bus lockout to prevent erroneous writes to the 8-bit parallel data bus during supply voltage drops, protecting timekeeping registers and configuration data in systems such as industrial controllers and alarm units that operate across wide temperature ranges.
Which legacy embedded control applications use the DP8571AN in a 24-pin PDIP package?
The DP8571AN in a 24-pin PDIP package is used in legacy industrial automation equipment, PLCs, and embedded computing boards where through-hole mounting, an 8-bit parallel bus, and 16-bit timer accuracy with 32 kHz oscillator support are required for reliable real-time clock operation.
When is the DP8571AN a practical choice compared to modern I2C or SPI RTC alternatives?
The DP8571AN suits designs that already use a parallel 8-bit direct-address bus architecture, as its 4 programmable timer modes, 16-bit resolution, and power-fail lockout feature deliver functionality in a 24-pin PDIP form factor that maps directly to legacy microprocessor address and data buses without requiring serial interface adapters.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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