AB08XX Series Real Time Clock Module Date of Issue: Sept. 10th, 2012 3.0 x 3.0 mm Page (1) of (12) Abracon Drawing # ESD Sensitive Revision #: Initial Release AB08XX Features Sub-threshold Power Optimized Technology by Ambiq Micro Ultra-low supply current: - <15 nA with RC oscillator - <20 nA with RC oscillator and autocalibration - <55 nA with crystal oscillator Baseline timekeeping features: - 32 KHz crystal oscillator with integrated load capacitor/resistor - Counters for hundredths, seconds, minutes, hours, date, month, year, century, and weekday - Alarm capability on all counters - Programmable output clock generation (32 kHz to 1/year) - Countdown timer with repeat function - Automatic leap year calculation Advanced timekeeping features: - Integrated power optimized RC oscillator - Advanced crystal calibration to ± 2 ppm - Advanced RC calibration to ± 16 ppm - Automatic calibration of RC oscillator to crystal oscillator - Watchdog timer with hardware reset - Up to 256 bytes of general purpose RAM Power management features: - Automatic switchover to VBAT - External interrupt monitor - Programmable brown out detection - Programmable analog voltage comparator I2C (up to 400 kHz) or SPI (up to 2 MHz) serial interface - Supports 3-wire and 4-wire SPI Operating Voltage 1.7-3.6 V Clock and RAM retention voltage 1.5-3.6 V Operating temperature –40 to 85 °C All inputs are Schmitt trigger 3 mm x 3 mm QFN-16 package Applications Smart cards Wireless sensors and tags Medical electronics Utility meters Data loggers Appliances Handsets Consumer electronics Communications devices Description The Abracon Corporation AB08XX Real Time Clock family provides a groundbreaking combination of ultra-low power coupled with a highly sophisticated feature set. With power requirements significantly lower than any other industry RTC (as low as 15nA), these are the first semiconductor products based on Abracon Corporation’s innovative SPOT (Subthreshold Power Optimized Technology by Ambiq Micro) CMOS platform. The AB08XX includes on-chip oscillators to provide minimum power consumption, full RTC functions including battery backup and programmable counters and alarms for timer and watchdog functions, and either an I2C or SPI serial interface for communication with a host controller. AB08XX Series Real Time Clock Module 1. ESD Sensitive Date of Issue: Sept. 10th, 2012 3.0 x 3.0 mm Page (1) of (12) Abracon Drawing # Revision #: Initial Release Family Summary The AB08XX family consists of several members. All devices are supplied in a standard 3 mm x 3 mm QFN-16 package. Members of the software and pin compatible AB18XX RTC with Power Management family are also listed. Part # AB0801-T3 AB0803-T3 AB0804-T3 AB0805-T3 AB0811-T3 AB0813-T3 AB0814-T3 AB0815-T3 AB1801-T3 AB1803-T3 AB1804-T3 AB1805-T3 AB1811-T3 AB1813-T3 AB1814-T3 AB1815-T3 Baseline Timekeeping Number XT of GP Osc Outputs ■ 2 ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ 2 4 4 2 2 3 3 Advanced Timekeeping RC Osc Calib/ Auto-calib ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Watchdog ■ ■ Power Management RA M (B) 0 64 256 256 0 ■ ■ 64 256 256 VBAT Switch Reset Mgmt Ext Int 2 4 4 2 2 3 3 ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ 0 ■ ■ 64 ■ 256 256 0 ■ ■ 64 256 256 ■ I2C SPI ■ ■ ■ ■ I2C SPI ■ ■ I2C ■ ■ ■ ■ Interface I2C Software and Pin Compatible AB18XX Family Components 2 Power Switch and Sleep FSM ■ ■ ■ ■ ■ ■ ■ ■ SPI SPI ■ ■ ■ ■ ■ ■ ■ ■ I2C I2C I2C I2C SPI SPI SPI SPI AB08XX Series Real Time Clock Module Date of Issue: Sept. 10th, 2012 3.0 x 3.0 mm Page (2) of (12) Abracon Drawing # ESD Sensitive Revision #: Initial Release 2. AB08XX Functional Description VCC VBAT nCE SDI SCL SDA/O Power Control Analog Compare I2C/SPI Interface Calibration Engine XO XT Osc Divider RC Osc Divider XI 100ths Seconds Minutes Hours Days Weekdays Months Years Alarms Timer WDT Control RAM WDI EXTI Int/Clock FOUT/nIRQ nIRQ2 nTIRQ CLKOUT/nIRQ3 VSS The AB08XX serves as a full function RTC for host processors such as microcontrollers. The AB08XX includes 3 distinct feature groups: 1) baseline timekeeping features and 2) advanced timekeeping features, and 3) basic power management features. Functions from each feature group may be controlled via memory mapped registers. These registers are accessed using either an I2C serial interface (e.g., in the AB0805) or a SPI serial interface (e.g., in the AB0815). The baseline timekeeping feature group supports the standard 32 kHz crystal (XT) oscillation mode for maximum frequency accuracy with an ultra-low current draw of 55 nA. An extended calibration mode enables low jitter digital calibration to an accuracy of ±2 ppm over a range of -614 ppm to +244 ppm. The baseline timekeeping feature group also includes a standard set of counters monitoring hundredths of a second up through centuries. A complement of countdown timers and alarms may additionally be set to initiate interrupts or resets on several of the outputs. The advanced timekeeping feature group supports two additional oscillation modes: 1) RC oscillator mode, and 2) autocalibration mode. At only 15 nA, the temperature-compensated ±10% RC oscillator mode provides an even lower current draw than the XT oscillator for applications with reduced frequency accuracy requirements. A proprietary calibration algorithm allows the AB08XX to digitally tune the RC oscillator frequency with accuracy as low as ±2 ppm at a given temperature and very low calibration jitter. In autocalibration mode, the RC oscillator is used as the primary oscillation source and is periodically calibrated against the XT oscillator. Autocalibration may be executed every autocalibration period (ACP) of 8.5 minutes or 17 minutes and may also be initiated via software. This mode enables average current draw of only 20 nA with frequency accuracy similar to the XT oscillator. The advanced timekeeping feature group also includes a rich set of input and output configuration options that enables the monitoring of external interrupts (e.g., pushbutton signals), the generation of clock outputs, and watchdog timer functionality. Power management features built into the AB08XX enable it to operate as a backup device in both line-powered and batterypowered systems. An integrated power control module automatically detects when main power (VCC) falls below a digitally-selectable threshold and switches to backup power (VBAT). Up to 256B of ultra-low leakage RAM enable the storage of key parameters when operating on backup power. The AB08XX also includes digitally-tunable voltage monitoring for brown-out detection and power-on reset. AB08XX Series Real Time Clock Module Date of Issue: Sept. 10th, 2012 3.0 x 3.0 mm Page (3) of (12) Abracon Drawing # ESD Sensitive Revision #: Initial Release 3. AB08XX Example Applications 3.1 Battery Backed Up RTC The most common AB08XX application is a battery backed up RTC, which maintains time and may hold data in RAM. The AB08XX is normally powered from a system power supply, which may be a larger battery. The AB08XX is continuously charging a supercapacitor or rechargeable battery via the internal trickle charger. When the main power supply goes away, the AB08XX automatically switches to the VBAT supply and maintains time and RAM data at very low battery supply currents. System Power VBAT Battery/ Supercap XO VCC AM08XX AB08XX MCU FOUT/nIRQ XI IRQ VSS 3.2 VCC I2C/SPI VSS RTC with Interrupt Aggregation The flexible inputs of the AB08XX can be used to aggregate a variety of interrupt sources, including external digital inputs, analog levels, timers and alarms into a single interrupt source to an MCU. System Power VCC XO XI Digital Inputs Analog Level VCC I2C/SPI AB08XX AM08XX WDI MCU FOUT/nIRQ IRQ VSS VSS EXTI VBAT AB08XX Series Real Time Clock Module 4. ESD Sensitive Date of Issue: Sept. 10th, 2012 3.0 x 3.0 mm Page (4) of (12) Abracon Drawing # Revision #: Initial Release Package Pin Description The AB08XX package pins are described below. The thermal pad on the QFN-16 packages must be connected to VSS. All NC pins must be left unconnected. XI XO VSS VCC nTIRQ (1) FOUT/nIRQ EXTI (1) VSS SCL (1) CLKOUT/nIRQ3 VSS PAD NC (3) WDI NC nIRQ2 1 nCE FOUT/nIRQ EXTI (3) SDI VSS PAD (4) VBAT SDO SCL (3) CLKOUT/nIRQ3 1 (2) VBAT SDA NC (1) WDI NC nIRQ2 AB081X AM081X VSS VCC XI XO AB080X AM080X (1) ––Available AvailableininAB0804 AM0804 AM0804 else NC (1) andand AB0804 only, only, else NC (2) andand AB0805 only, only, else VSS (2) ––Available AvailableininAB0803 AM0803 AM0805 else VSS (3) andand AB0815 only, only, else NC (3) ––Available AvailableininAB0814 AM0814 AM0815 else NC (4) – Available in AB0813 and AB0815 only, else VSS (4) – Available in AM0813 and AM0815 only, else VSS Pin Name Pin Type Function VSS Power Ground VCC XI XO VBAT SCL SDO SDI nCE SDA EXTI WDI FOUT/nIRQ nIRQ2 CLKOUT/nIRQ3 nTIRQ Power XT XT Power Input Output Input Input Input Input Input Output Output Output Output System power supply Crystal input Crystal output Battery power supply I2C or SPI interface clock SPI data output SPI data input SPI chip select I2C data input/output External interrupt input Watchdog reset input Interrupt 1/function output Interrupt 2/output Interrupt 3/clock output Timer interrupt output 01 5, 9, 14 13 16 15 7 6 11 4 Pin Number in AB08XX 03 04 05 11 13 14 5, 9, 9, 5, 5, 9, 14 14 14 14 14 14 13 13 13 13 13 13 16 16 16 16 16 16 15 15 15 15 15 15 5 5 5 7 7 7 7 7 7 6 6 6 9 9 9 12 12 12 6 6 6 10 10 10 2 2 2 11 11 11 11 11 11 4 4 4 4 4 4 8 8 8 12 12 15 14 13 16 15 5 7 6 9 12 10 2 11 4 8 AB08XX Series Real Time Clock Module Date of Issue: Sept. 10th, 2012 3.0 x 3.0 mm Page (5) of (12) Abracon Drawing # ESD Sensitive Revision #: Initial Release 5. Electrical Specifications 5.1 Absolute Maximum Ratings All voltages referenced to VSS. SYMBOL VCC VBAT VI VI VO VO II IO 5.2 PARAMETER TEST CONDITIONS System Power Voltage Battery Voltage MIN MAX UNIT -0.3 TYP 3.6 V -0.3 3.6 V Input voltage VCC > VMIN -0.3 VCC + 0.3 V Input voltage VCC < VMIN, VBAT > VMIN -0.3 VBAT + 0.3 V Output voltage VCC > VMIN -0.3 VCC + 0.3 V Output voltage VCC < VMIN, VBAT > VMIN -0.3 VBAT + 0.3 V -1 1 mA Input current Output current VESD ESD Voltage ILU TSTG TOP Latch-up Current 1 mA CDM -1 ±500 V HBM ±4000 V 100 mA -65 150 °C -40 85 °C 300 °C 260 °C MAX UNIT Storage Temperature Operating Temperature TSLD Lead temperature TREF Reflow soldering temperature Hand soldering for 10 seconds Reflow profile per JEDEC J-STD-020D Operating Parameters TA = -40 °C to 85 °C, TYP values at 25 °C SYMBOL VCC PARAMETER System Power Voltage TEST CONDITIONS MIN 2 TYP SPI or I C active 1.7 3.6 V Clock operating + RAM 1.5 3.6 V 1.5 3.6 V VBAT Battery Voltage Clock operating + RAM VT+ Positive-going Input Threshold Voltage VCC = 3.0V 1.5 VCC = 1.8V 1.1 VT- Negative-going Input Threshold Voltage VCC = 3.0V 0.9 VCC = 1.8V 0.6 VOL Low level output voltage High level output voltage on push-pull outputs Power supply valid voltage 1.7V < VCC < 3.6V VOH VMIN 1.7V < VCC < 3.6V VSS V V 0.2•VCC 0.8•VCC 1.5 V VCC V V AB08XX Series Real Time Clock Module ESD Sensitive Date of Issue: Sept. 10th, 2012 3.0 x 3.0 mm Page (6) of (12) Abracon Drawing # 5.3 Revision #: Initial Release Supply Current The current supplied into the VCC or VBAT power inputs under various conditions is shown below. TA = -40 °C to 85 °C, VBAT = 0 V to 3.6 V, TYP values at 25 °C SYMBOL IVCC:I2C IVCC:SPI IVCC:XT IVCC:RC IVCC:ACAL PARAMETER VCC supply current during I2C burst read/write VCC supply current during SPI burst read/write VCC supply current in XT oscillator mode. VCC supply current in RC oscillator mode. VCC supply current in autocalibrated RC oscillator mode. IVBAT:XT VBAT supply current in XT oscillator mode. IVBAT:RC VBAT supply current in RC oscillator mode. IVBAT:ACAL VBAT supply current in autocalibrated RC oscillator mode. IVBAT:VCC VBAT supply current in VCC powered mode. TEST CONDITIONS 400kHz bus speed, 10k pull-up resistors on SCL/SDA. (1) VCC VBAT 3.0V 1.8V Time keeping mode with XT oscillator running. (3) Time keeping mode with only the RC oscillator running (XT oscillator is off). (3) Time keeping mode with only RC oscillator running and autocalibration enabled. ACP = 512 seconds. (3) Time keeping mode with XT oscillator running. (3) Time keeping mode with only the RC oscillator running (XT oscillator is off). (3) Time keeping mode with only RC oscillator running and autocalibration enabled. ACP = 512 seconds. (3) VCC powered mode. (3) 1.8V NA < 1.5V < 1.5V < 1.5V > 1.5V 10 µA 5 µA 50 nA 15 NA 3.0V 1.8V UNIT 55 NA 3.0V 1.8V MA X 10 3.0V 1.8V TYP 20 NA 3.0V 2 MHz bus speed (2) MIN 12 nA 18 NA 15 3.0V 55 1.8V 50 3.0V 15 1.8V 12 3.0V 18 1.8V 15 3.0V 290 1.8V 190 nA nA nA nA pA (1) Excluding external peripherals and pull-up resistor current. All other inputs (besides SDA and SCL) are at 0V or VCC. AB080X and AB180X only. (2) Excluding external peripheral current. All other inputs (besides SDI, nCE and SCL) are at 0V or V CC. AB081X and AB181X only. (3) All inputs and outputs are at 0V or VCC. AB08XX Series Real Time Clock Module ESD Sensitive Date of Issue: Sept. 10th, 2012 3.0 x 3.0 mm Page (7) of (12) Abracon Drawing # Revision #: Initial Release 6. Tape and Reel Information T (thickness) REEL DRAWING Detail A D C Detail A Detail B B Detail B L N R = 4 mm R = 4 mm G 5ᵒ W1 (inner width at HUB) A W3 (inner width at outer edge of reel) W2 (outer width at HUB) P2 P0 E1 K1 ø D1 F W B0 Detail A Y DETAIL A R 0. EF 35 3ᵒ REF K0 REF R0.65 R0 REF .6 0 CARRIER TAPE DRAWING ø D0 Y P1 A0 SECTION Y-Y 330 x 178 x 12 mm Reel Dimensions Symbol MIN TYP MAX Units T 2.3 2.5 2.7 N 178.0 L 330.0 W1 12.4 12.4 12.6 W2 18.4 W3 12.4 15.4 mm C 12.8 13.0 13.5 D 20.2 A 10.0 G 4.0 B 1.5 3x3 QFN Carrier Tape Dimensions Symbol MIN TYP MAX Units B0 3.2 3.3 3.4 K0 0.9 1.0 1.1 K1 0.25 0.3 0.35 D0 1.50 1.55 1.60 D1 1.5 P0 3.9 4.0 4.1 mm P1 7.9 8.0 8.1 P2 1.9 2.0 2.1 A0 3.2 3.3 3.4 E1 1.65 1.75 1.85 F 5.4 5.5 5.6 W 11.7 12.0 12.3 AB08XX Series Real Time Clock Module Date of Issue: Sept. 10th, 2012 3.0 x 3.0 mm Page (8) of (12) Abracon Drawing # 7. Reflow Profile The AB08XX reflow soldering requirements are described below. Profile Feature Requirement Preheat/Soak Temperature Min (Tsmin) Temperature Max (Tsmax) Time (ts) from (Tsmin to Tsmax) 150 °C 200 °C 60-120 seconds Ramp-up rate (TL to Tp) 3 °C/second max. Liquidous temperature (T L) Time (tL) maintained above TL 217 °C 60-150 seconds Peak package body temperature (T p) 260 °C max. Time (tp) within 5 °C of Tp 30 seconds max. Ramp-down rate (Tp to TL) 6 °C/second max. Time 25 °C to peak temperature 8 minutes max. ESD Sensitive Revision #: Initial Release AB08XX Series Real Time Clock Module Date of Issue: Sept. 10th, 2012 3.0 x 3.0 mm Page (9) of (12) Abracon Drawing # ESD Sensitive Revision #: Initial Release 8. Ordering Information AB08XX Orderable Part Numbers P/N AB0801-T3 AB0803-T3 AB0804-T3 AB0805-T3 AB0811-T3 AB0813-T3 AB0814-T3 AB0815-T3 Tape and Reel Qty 3000pcs/reel 3000pcs/reel 3000pcs/reel 3000pcs/reel 3000pcs/reel 3000pcs/reel 3000pcs/reel 3000pcs/reel Package Pb-Free(1) 16-Pin QFN 3 x 3 mm Temperature Range MSL Level(2) -40 to +85 °C 1 Notes: (1) Compliant and certified with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in raw homogeneous materials. The package was designed to be soldered at high temperatures (per reflow profile) and can be used in specified lead-free processes. (2) Moisture Sensitivity Level rating according to the JEDEC J-STD-020D industry standard classifications. AB08XX Series Real Time Clock Module Date of Issue: Sept. 10th, 2012 3.0 x 3.0 mm Page (10) of (12) Abracon Drawing # ESD Sensitive Revision #: Initial Release 9. Notes i) The parts are manufactured in accordance with this specification. If other conditions and specifications which are required for this specification, please contact ABRACON for more information. ii) ABRACON will supply the parts in accordance with this specification unless we receive a written request to modify prior to an order placement. iii) In no case shall ABRACON be liable for any product failure from in appropriate handling or operation of the item beyond the scope of this specification. iv) When changing your production process, please notify ABRACON immediately. ABRACON Corporation’s products are COTS – Commercial-Off-The-Shelf products; suitable for Commercial, Industrial and, where designated, Automotive Applications. ABRACON’s products are not specifically designed for Military, Aviation, Aerospace, Life-dependant Medical applications or any application requiring high reliability where component failure could result in loss of life and/or property. For applications requiring high reliability and/or presenting an extreme operating environment, written consent and authorization from ABRACON Corporation is required. Please contact ABRACON Corporation for more information. vi) All specifications and Marking will be subject to change without notice. v) 10. ABRACON CORPORATION – TERMS & CONDITIONS OF SALE PLEASE NOTE: Claims for pricing errors, shortages and defective products must be reported within 10 days from receipt of goods. Returned products will not be accepted after 30 days from the invoice date, and may be subject to restocking fees in accordance with Abracon Corporation’s return policy. Abracon standard product purchase orders may not be canceled within 60 days of original shipping date. Abracon non-standard product purchase orders are non-cancelable and non-returnable. All schedule changes must be requested prior to 30 days of original shipping date. 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When quantity price discounts are quoted by AB, the discounts are computed separately for each type of product to be sold and are based upon the quantity of each type and each size ordered at any one time. If any order is reduced or cancelled by the Buyer with AB’s consent, the prices shall be adjusted to the higher prices, if applicable, for the uncancelled quantity. Unless otherwise agreed, AB reserves the right to ship and bill ten percent more or less than the exact quantity specified. 2. Taxes: Unless otherwise specified in the quotation, the prices shown do not include any taxes, import, or export duties, tariffs, or customs charges. 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Claims against AB AB08XX Series Real Time Clock Module Date of Issue: Sept. 10th, 2012 3.0 x 3.0 mm Page (11) of (12) Abracon Drawing # ESD Sensitive Revision #: Initial Release for shortages must be made in writing within ten days after the arrival of the shipment. AB is not required to notify the Buyer of the shipment. 5. Delivery: Shipping dates are approximate. 6. Packing: Unless otherwise specified, prices quoted herein include normal AB packaging. If special packaging is required by the Buyer, an additional charge will be made. 7. Inspection: Unless the Buyer notifies AB in writing within ten days from the date of receipt of any products that says the products are rejected, they will be deemed to have been accepted by the Buyer. In order for the notice of rejection to be effective, it must also specify the reasons why the products are being rejected. Any rejected products must be returned to AB within thirty days of rejection or the rejection shall be void and of no effect. 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