Preliminary SiT1534 Ultra-Small, Ultra-Low Power 1 Hz - 32.768 kHz Programmable Oscillator The Smart Timing Choice The Smart Timing Choice Features Applications Factory programmable from 32.768 kHz down to 1 Hz Wireless Mouse or Trackball Smallest footprint in chip-scale (CSP): 1.5 x 0.8 mm Wireless Keypads Pin-compatible to 2.0 x 1.2 mm XTAL SMD package Pulse-per-Second (pps) Timekeeping Ultra-low power: <1A RTC Reference Clock Vdd supply range: 1.5V to 3.63V over -40C to +85C Battery Management Timekeeping Supports low-voltage battery backup from a coin cell or supercap Oscillator output eliminates external load caps NanoDrive programmable output swing for lowest power Internal filtering eliminates external Vdd bypass cap <20 PPM initial stability <100 PPM stability over -40C to +85C Pb-free, RoHS and REACH compliant Electrical Characteristics Parameter Symbol Min. Typ. Max. Unit Condition Frequency and Stability Programmable Output 1.00 32768.0 Hz Factory programmed between 1 and 32.768 kHz in powers of 2 Frequency Frequency Stability 20 T = 25C, Vdd: 1.5V 3.63V A T = -10C to +70C, Vdd: 1.5V 3.63V. Stability includes initial, A 75 power supply, and temperature stability components. 1 F stab PPM Frequency Stability T = -40C to +85C, Vdd: 1.5V 3.63V. Stability includes initial, A 100 power supply, and temperature stability components. T = -10C to +70C, Vdd: 1.2V 1.5V. Stability includes initial, A 250 power supply, and temperature stability components. 25C Aging -3 3 PPM 1st Year Supply Voltage and Current Consumption T = -10C to +70C 1.2 3.63 V A Operating Supply Voltage Vdd 1.5 3.63 V T = -40C to +85C A Power Supply Reset Voltage Reset 0.3 V 0.9 T = 25C, Vdd: 1.5V 3.63V. No load A 2, 3 Core Operating Current Idd 1.3 A T = -10C to +70C, Vdd max: 3.63V. No load A 1.35 T = -40C to +85C, Vdd max: 3.63V. No load A 3 T = -40C to +85C, Vdd: 1.5V 3.63V. No load Idd out 0.065 0.125 A/Vpp Output Stage Operating Current A t Vdd Power-Supply Ramp 100 ms T = -40C to +85C, 0 to 100% Vdd A Ramp T at Power-up T = -40C to +85C T start 150 300 ms START-UP A Operating Temperature Range Commercial Temperature -10 70 C T use Industrial Temperature -40 85 C LVCMOS Output Option, T = -40C to +85C, typical value is T = 25C A A Output Rise/Fall Time tr, tf 100 200 ns 10-90%, 15 pF load, Vdd = 1.5V to 3.63V Output Clock Duty Cycle DC 48 52 % Vdd: 1.5V 3.63V. I = -10A, 15 pF Output Voltage High VOH 90% V OH Vdd: 1.5V 3.63V. I = 10 A, 15 pF Output Voltage Low VOL 10% V OL NanoDrive Programmable, Reduced Swing Output Output Rise/Fall Time tf, tf 200 ns 10-90%, 15 pF Load Output Clock Duty Cycle DC 48 52 % AC-coupled Programmable V sw 0.25 0.80 V Vdd: 1.2V 3.63V, 15 pF Load, 10 pF, I / I = 0.2A OH OL Output Swing DC-Biased Programmable VOH 0.5 1.20 V Vdd: 1.2V 3.63V. I = -0.2 A, 10 pF Load OH Output Voltage High Range DC-Biased Programmable VOL 0.35 0.80 V Vdd: 1.2V 3.63V. I = 0.2 A, 10 pF Load OH Output Voltage Low Range Notes: 1. Stability is specified for two operating voltage ranges. Stability progressively degrades with supply voltage below 1.5V. 2. Core operating current does not include output driver operating current or load current. 3. To derive total operating current (no load), add core operating current + (0.065 A/V) * (output voltage swing). SiTime Corporation 990 Almanor Avenue Sunnyvale, CA 94085 (408) 328-4400 www.sitime.com Rev 0.78 Revised July 22, 2013SiT1534 Ultra-Small, Ultra-Low Power 1 Hz - 32.768 kHz Programmable Oscillator The Smart Timing Choice The Smart Timing Choice Electrical Characteristics (continued) Parameter Symbol Min. Typ. Max. Unit Condition Jitter Performance (T = 25C, Vdd = 1.5V to 2.0V, unless otherwise stated) A Period Jitter T djitt 45 ns N = 10,000 RMS Pin Configuration (SMD) Pin Symbol I/O Functionality No Connect. Will not respond to any input signal. When the SiT1534 is SMD Package (Top View) No Connect, used as an alternative to an XTAL, this pin is typically connected to the 1NC dont care receiving ICs X Out pin. In this case, the SiT1534 will not be affected by Vdd the signal on this pin. Power Supply 4 2GND Connect to ground. Ground NC 1 3 CLK Out Oscillator clock output. When the SiT1534 is used as an alternative to an XTAL, the CLK Out is typically connected to the receiving ICs X IN pin. 3CLK Out OUT No need for load capacitors. The output driver is independent of capac- 2 itive loading. GND Connect to power supply 1.2V Vdd 3.63V. Under normal operating conditions, Vdd does not require external bypass/decoupling capacitor(s). 4 Vdd Power Supply Contact factory for applications that require a wider operating supply voltage range. Pin Configuration (CSP) Pin Symbol I/O Functionality CSP Package (Top View) Power Supply Connect to ground. Acceptable to connect pin 1 and 4 together. Both pins 1, 4 GND Ground must be connected to GND. Oscillator clock output. The CLK can drive into a Ref CLK input or into an ASIC or chip-sets 32kHz XTAL input. When driving into an ASIC or GND 1 4 GND chip-set oscillator input (X IN and X Out), the CLK Out is typically 2CLK Out OUT connected directly to the XTAL IN pin. No need for load capacitors. The output driver is intended to be insensitive to capacitive loading. CLK Out 2 3 Vdd Connect to power supply 1.2V Vdd 3.63V. Under normal operating conditions, Vdd does not require external bypass/decoupling capacitor(s). 3 Vdd Power Supply Contact factory for applications that require a wider operating supply voltage range. System Block Diagram MEMS Resonator NC Control Regulators Vdd Trim Prog Prog Ultra-Low Sustaining Ultra-Low GND Divider CLK Out Power Power Driver Amp PLL Figure 1. Rev. 0.78 Page 2 of 8 www.sitime.com