My Inquiry
My Account
NXP Semiconductors PCF8593P,112
- Part No.:
- PCF8593P,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Real Time Clocks
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
PCF8593P,112.pdf
- Description:
- IC RTC CLOCK/CALENDAR I2C 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,771
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PCF8593P,112 from NXP Semiconductors is a low-power CMOS real-time clock and calendar IC with I²C-bus interface, 32.768 kHz oscillator, four-year calendar, programmable alarm/timer, and 16-byte register space (8 for timekeeping, 8 for alarm or RAM). It operates from 1.0 V to 6.0 V and draws just 1 μA typical at 2.0 V in clock mode - ideal for battery-backed embedded systems requiring long-term timekeeping.
For engineers reviewing the PCF8593P,112 datasheet, PCF8593P,112 pinout, PCF8593P,112 application, or PCF8593P,112 equivalent, key selection considerations include its SO8 package, I²C slave address (A2h write / A3h read), open-drain INT output, dual time bases (32.768 kHz or 50 Hz), BCD-encoded counters, and alarm interrupt logic with software-resettable flags.
Technical Context
The PCF8593P,112 integrates an on-chip 32.768 kHz oscillator circuit (requiring external crystal on OSCI/OSCO), a frequency divider, auto-incrementing 8-bit address register, and I²C-bus interface compliant with standard-mode (100 kHz) timing. Its 16-byte memory map includes dedicated registers for hundredths of seconds through weekdays/months, plus timer and alarm control registers.
It supports three functional modes: 32.768 kHz clock mode, 50 Hz clock mode, and event-counter mode - selected via bits 4–5 of the control/status register (00h). Alarm functionality is enabled independently via bit 2 of that register, activating memory locations 08h–0Fh as alarm registers or free RAM depending on configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.0 V to 6.0 V - enables operation from single-cell Li-ion or coin-cell backup without level shifting |
| Typical Operating Current | 1 μA at VDD = 2.0 V, fSCL = 0 Hz - ensures multi-year battery life in standby |
| I²C Slave Address | A2h (write), A3h (read) - fixed 7-bit address with R/W bit; no address pins or configuration required |
| Time Base Options | 32.768 kHz crystal or 50 Hz external signal - supports mains-synchronized or precision quartz timing |
| Calendar Range | Four-year cycle with BCD-encoded date/month/year/weekday - handles leap years and variable month lengths automatically |
| Alarm Capability | Dated, daily, weekday, or timer-based alarms - each with independent enable and flag control via register 08h |
| Interrupt Output | Open-drain INT (pin 7), active LOW - directly interfaces with µC GPIOs; toggles at 1 Hz if alarm disabled |
Pinout & Package
PCF8593P,112 is housed in an SO8 (Small Outline, 8-lead) plastic package per SOT96-1, 3.9 mm body width, surface-mount compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OSCI | Oscillator input | Accepts 32.768 kHz crystal or 50 Hz external clock; high-impedance in event-counter mode |
| 2: OSCO | Oscillator output | Drives crystal; requires external trimmer capacitor to VDD for frequency tuning |
| 3: RESET | Reset input | Active-LOW signal resets only I²C interface - clock registers and status remain unchanged |
| 4: VSS | Ground supply | Reference for all internal logic and analog blocks; must be low-impedance connection |
| 5: SDA | Serial data line | Open-drain bidirectional I²C bus line; requires external pull-up resistor (typically 2.2–10 kΩ) |
| 6: SCL | Serial clock line | Input-only I²C clock; synchronizes data transfer; driven by master device |
| 7: INT | Interrupt output | Open-drain, active-LOW flag output - asserts on alarm/timer overflow; software-cleared |
| 8: VDD | Supply voltage | Power for logic, oscillator, and I²C interface; supports wide range (1.0–6.0 V) for flexible system integration |
Key Features
| Feature | Design Value |
|---|---|
| Auto-incrementing address register | Eliminates manual address management during sequential I²C reads/writes across time registers |
| BCD-encoded time counters | Enables direct decimal display and simplifies human-readable time parsing without binary-to-BCD conversion |
| Software-controllable alarm masking | Allows reading date/month without weekday/year interference via mask flag in control register (00h, bit 4) |
| Event counter mode (6-digit) | Counts up to 1 million external pulses on OSCI; stores values in hex format across registers 01h–03h |
| Timer with programmable resolution | Counts 0–99 with selectable units: hundredths/sec, sec, min, hr, or day - controlled by alarm register LSBs |
Applications
| Smart Energy Meters | Industrial PLCs |
|---|---|
Use Scenario: Maintaining accurate billing timestamps and tariff-switching schedules in electricity/gas meters with >10-year battery life. IC Role / Device Role / Timing Role: Primary RTC providing tamper-resistant, temperature-compensated timekeeping synchronized to utility grid frequency (50 Hz mode). Use Value: Enables precise interval energy measurement and remote firmware-triggered tariff updates without external clock source dependency. |
Use Scenario: Logging machine runtime, maintenance intervals, and process cycle timestamps in factory automation controllers. IC Role / Device Role / Timing Role: Standalone calendar/timekeeper with alarm-driven event logging and watchdog timer reset coordination. Use Value: Provides deterministic timestamping for ISO 13849-compliant safety logs and eliminates µC real-time scheduling overhead for time-critical tasks. |
| Medical Wearables | Point-of-Sale Terminals |
Use Scenario: Tracking therapy session durations and medication reminders in battery-powered glucose monitors or inhalers. IC Role / Device Role / Timing Role: Ultra-low-power RTC maintaining time across deep-sleep cycles; triggers INT on alarm for user alerts. Use Value: Extends CR2032 coin-cell life beyond 3 years while enabling reliable daily dose notifications without host MCU wake-up. |
Use Scenario: Securing transaction timestamps and audit trails in EMV-compliant payment terminals with non-volatile time integrity. IC Role / Device Role / Timing Role: Tamper-evident time source with battery-backed retention; alarm flags used for end-of-day batch closure verification. Use Value: Meets PCI PTS 6.x requirements for cryptographically signed time stamps and prevents time rollback attacks via hardware-enforced monotonicity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar real-time clock applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS1307+T&R | Lacks 50 Hz time base and event counter mode; no timer overflow flag; uses different I²C address (68h) | No support for mains-synchronized timing or pulse counting; simpler alarm structure (only seconds-minutes-hours match) | Choose DS1307+T&R only when basic RTC function suffices and board layout already accommodates its SO8 footprint and 32.768 kHz crystal network. |
| RV-3028-C7 | Higher accuracy (±5 ppm vs ±20 ppm typical); integrated crystal; lower current (150 nA typical); supports SPI and I²C | Better suited for portable devices needing ultra-low power and factory-calibrated stability; no 50 Hz mode or event counter | Select RV-3028-C7 when long-term accuracy and minimal external components outweigh need for 50 Hz synchronization or external pulse counting capability. |
Compared with DS1307+T&R and RV-3028-C7, the PCF8593P,112 uniquely combines 50 Hz mains-locking, event counting, and BCD calendar in a cost-optimized SO8 package - making it optimal for industrial metering and legacy system upgrades where those features are mandatory.
Availability
PCF8593P,112 is available at Aetrix Electronics and suitable for smart energy meters, industrial PLCs, medical wearables, and point-of-sale terminals requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for PCF8593P,112 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with over 30 years of RTC design heritage.
The PCF8593P,112 belongs to NXP's legacy low-power timing portfolio, engineered specifically for cost-sensitive, battery-backed applications demanding robust calendar functionality, flexible time bases, and interrupt-driven event response - not general-purpose microcontroller peripherals.
FAQ
What is the operating temperature range for the PCF8593P,112?
The PCF8593P,112 is rated for ambient temperatures from -40 °C to +85 °C. This industrial-grade range ensures reliable operation in harsh environments such as outdoor energy meters, factory-floor PLCs, and automotive under-hood modules where thermal cycling and extended temperature exposure occur. The oscillator remains stable across this full range when powered within its specified 1.0 V to 6.0 V supply window.
Does the PCF8593P,112 require an external crystal?
Yes, the PCF8593P,112 requires an external 32.768 kHz quartz crystal connected between OSCI (pin 1) and OSCO (pin 2). A trimmer capacitor (typically 12–22 pF) between OSCI and VDD is also needed for frequency calibration. In 50 Hz mode or event-counter mode, the crystal is disabled and OSCI accepts an external 50 Hz or pulse signal instead.
How does the PCF8593P,112 handle leap years and variable month lengths?
The PCF8593P,112 implements a four-year calendar algorithm in hardware. Its BCD-encoded date/month/year registers (05h–06h) automatically advance correctly across February 28/29, months with 30/31 days, and year rollovers - including leap year detection based on the 4-year cycle. No firmware intervention is required for calendar correctness.
Can the PCF8593P,112 operate from a 1.2 V supply?
Yes, the PCF8593P,112 supports a minimum supply voltage of 1.0 V for clock operation at 0 °C to +70 °C, and 1.2 V across the full -40 °C to +85 °C range. At 1.2 V, it maintains full RTC functionality including alarm, timer, and I²C communication - enabling direct integration with single NiMH/NiCd cells or low-voltage energy harvesting systems.
What happens to the time registers during a RESET signal on pin 3?
A RESET signal applied to pin 3 of the PCF8593P,112 resets only the I²C-bus interface logic - it does not clear or alter the contents of the time registers, control/status register (00h), or alarm registers. This allows safe bus recovery without losing timekeeping state, critical for systems where uninterrupted calendar continuity is required even after communication faults.
PCF8593P,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Clock/Calendar
- Features:
- Alarm, NVSRAM
- Memory Size:
- 8B
- Time Format:
- HH:MM:SS:hh (12/24 hr)
- Date Format:
- YY-MM-DD-dd
- Interface:
- I2C, 2-Wire Serial
- Voltage - Supply:
- 2.5V ~ 6V
- Voltage - Supply, Battery:
- -
- Current - Timekeeping (Max):
- 8µA ~ 15µA @ 2V ~ 5V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-DIP
PCF8593P,112 FAQ
1.How can I place an order for PCF8593P,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for PCF8593P,112 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for PCF8593P,112 reliable?
The price and inventory of PCF8593P,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCF8593P,112 is usually 5 days.
3.What payment methods are accepted for PCF8593P,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCF8593P,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCF8593P,112?
PCF8593P,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCF8593P,112 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for PCF8593P,112?
For technical support, including PCF8593P,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCF8593P,112 requirements.
6.How does Aetrix verify that PCF8593P,112 is sourced from the original manufacturer or authorized distributors?
All PCF8593P,112 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PCF8593P,112 meets industry standards.
7.What is the process for return or replacement of PCF8593P,112?
All PCF8593P,112 units undergo pre-shipment inspection (PSI). If there is an issue with PCF8593P,112, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The PCF8593P,112 part is unused and in its original packaging.
Return procedure for PCF8593P,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PCF8593P,112 Tags
-
MCP7940N-I/SN
Microchip Technology
-
MCP7940MT-I/MNY
Microchip Technology
-
PCF85063ATL/1,118
NXP USA Inc.
-
MCP7940NT-I/SN
Microchip Technology
-
MCP7940NT-I/MS
Microchip Technology
-
MCP7940N-I/MS
Microchip Technology
-
PCF85063AT/AY
NXP USA Inc.
-
PCF85063TP/1Z
NXP Semiconductors
-
PCF85063ATT/AJ
NXP USA Inc.
-
MCP7940NT-E/SN
Microchip Technology
-
MCP7940NT-I/MNY
Microchip Technology
-
MCP79400T-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
