Real time clock module SERIAL-INTERFACE REAL TIME CLOCK MODULE RTC-4543SA/SB • • • • • • Builtin crystal unit allows adjustment-free efficient operation. Automatic leap year correction. Output selectable between 32.768 KHz/1 Hz. Operating voltage range: 2.5V to 5.5V. Supply voltage detection voltage: 1.7±0.3V. Low current consumption: 1.0 µA/2.0V (Max.) Actual size Specifications (characteristics) Absolute Max. rating Item Symbol Condition Power source voltage VDD VDD-GND Input voltage VIN Output voltage VOUT Storage temperature TSTG Terminal connection Min. Max. Unit 7.0 RTC-4543SA -0.3 V VDD+0.3 14 13 12 11 10 9 8 1 7 No. 4543SA 1 GND 2 N.C 3 CE 4 FSEL WR 5 FOE 6 N.C 7 N.C 8 VDD 9 CLK 10 DATA 11 N.C 12 N.C 13 FOUT 14 — 15 — 16 — 17 — 18 — -55 +125 ˚C Min. Max. Unit 5.5 V +85 ˚C Operating range Item Symbol Operating voltage VDD Date holding voltage VCLK Operating temperature TOPR Condition 2.5 — 1.4 -40 2 3 4 5 6 RTC-4543SB 18 17 16 15 14 13 12 11 10 Frequency characteristics Top -10 to +70˚C +10/-120 fV Ta=25˚C, VDD=2.0 to 5.5V ±2 ppm/V tOSC Ta=25˚C, VDD=2.5V 3 s fa First year Ta=25˚C, VDD=5V ±5 ppm/year 4 5 6 7 8 9 Condition Min. 0.8VDD Typ. Max. Unit External dimensions (Unit: mm) RTC-4543SA (SOP 14-pin) R4543 B E 607 6A V 10.1±0.2 µA V 0˚ to 10˚ 0.05 min. 0.6 RTC-4543SB 0.15 (SOP 18-pin) µA R4543 B V E 607 6A 11.4±0.2 µA 1.27 7.8±0.2 Symbol (VDD=5V±0.5V, Ta=-40 to 85˚C) — WR, DATA, CE, CLK, VIH FOE,FSEL pins DD 0.2V VIL — 0.5 IOFF WR, CE, CLK, FOE,FSEL pins 4.5 VOH1 VDD=5.0V IOH=-1.0 mA — “H” output voltage — 2.5 VOH2 VDD=3.0V DATA, FOUT pins 0.5 VOL1 VDD=5.0V IOH=1.0 mA — “L” output voltage 0.8 VOL2 VDD=3.0V DATA, FOUT pins IOZH VOUT=5.5V Output leak current 1.0 DATA, FOUT pins -1.0 IOZL VOUT=0V Supply detection voltage VDT 2.0 1.4 1.7 — CL 30 pF(max.) Output load conditions FOUT pin N 2LS-TTL 1 IDD1 VDD=5.0V 1.5 3.0 CE="L", FOE="L" 2 IDD2 VDD=3.0V 1.0 2.0 FSEL="H" 3 IDD3 VDD=2.0V 0.5 1.0 Current — 4 IDD4 VDD=5.0V CE="L", FOE="H" 4.0 consumption 10.0 5 IDD5 VDD=3.0V 2.5 6.5 FSEL="L" 6 IDD6 VDD=2.0V No load on the FOUT pin 1.5 4.0 49 2 3 2.0 max. Item 1 ppm DC characteristics “H” input voltage “L” input voltage Input off-leak current Unit 5.0 Aging 5±23 7.4±0.2 Oscillation start time Range Ta=25˚C, VDD=5V 3.1 3.2±0.1 Frequency voltage characteristics Condition ∆f/fo 5.4 Frequency temperature characteristics Symbol 1.8 Item Frequency tolerance 4543SB N.C N.C N.C N.C FOE WR FSEL CE GND FOUT DATA CLK N.C VDD N.C N.C N.C N.C 0˚ to 10˚ 0.05 min. 0.4 0.6 0.15 Real time clock module Register table MSB Seconds (0 to 59) FDT s 40 s 20 s 10 s8 s4 s2 s1 Minutes (0 to 59) ∗ mi 40 mi 20 mi 10 mi 8 mi 4 mi 2 mi 1 Hour (0 to 23) ∗ ∗ h 20 h 10 h8 h4 h2 h1 ∗ w4 w2 w1 Day of the week (1 to 7) ∗ ∗ d 20 d 10 d8 d4 d2 d1 Month (1 to 12) TM ∗ ∗ mo 10 mo 8 mo 4 mo 2 mo 1 year (0 to 99) y 80 y 40 y 20 y 10 y8 y4 y2 y1 Day (1 to 31) FDT bit: Supply voltage detection bit. TM bit: Test bit always set this bit to "0". Timing chart Switching characteristics (Ta=-40 to +85˚C, CL=30 pF) VDD= 5V± 10% Symbol Item CLK clock cycle t CLK CLK high pulse width t CLKH CLK low pulse width t CLKL Min. Max. Min. Max. 0.75 7800 1.5 7800 3900 3900 tCE WR µs — t CEH CE enable time t CE Write data setup time t SD Write data hold time t HD WR setup time t WRS WR hold time t WRH DATA output delay time — CE 0.9 — 0.9 0.2 — 100 tDATA µs 0.1 0.1 — ns 100 Data write tCE 0.2 0.4 0.1 0.2 WR Clock input rise time t r1 50 100 CE Clock input fall time t f1 FOUT rise time t r2 — Enable time µs tWRS — tCES CLK tRCV tCLKH tCLKL 200 100 tWRH tf1 tr1 tCLK tCEH ns t f2 tOZ tCLKL s tRCV tCLKH DATA t DZ CL= 30pF tCEH — t DATA Disable time tf1 tr1 tCLK tCES DATA output floating time FOUT fall time tWRH tWRS CLK t CES CE hold time Data read Unit 0.75 0.375 CE setup time VDD= 3V± 10% DATA t XZ tSD tHD t ZX FOUT duty ratio Duty 40 60 Wait time t rcv 0.95 — 40 60 % 1.9 — µs FOUT tf 2 tH Block diagram FOUT 32.768 kHz tr2 Oscillator Divider Clock and calendar t tH Duty= t x 100 [%] F OUT F SEL F OE Disabled and Enabled Output controller Shift register FOE VIH Enabled Disabled DATA CLK WR CE I/O controller Voltage detecter VIL tXZ tZX Control circuit FOUT High impedance 50