BO tir Te i a Lerel ee a Bue ce ee Hf Specifications (characteristics) al Absolute Max. rating | @ Terminal connection Symbol | Condition (Spectators (Unt) | @ RTC-72421 Voo Te C -0.3 to 7.0 Vio Ta=25C | GND-0.3to Von+0.3 | V RTC-72421 -55 to +85 , Ts | RT-72423 55 to +125 C Under 260C within 10 sec. RTG-72424 (lead part) (package should be fess than 150C) Twice at under 260G within RTGC-72423 | 10 sec. or under 230C within 3 min. Tsoi @ RTC-72423 24 23 22 21 20 19 18 17 16 15 14 13 4.5 to 55 Operating voitage : Operating temperat Torr RTG-72421 10 to 70 Cc RTG-72423 -40 to 85 Data holding: volt Vox 2.0t0 5.5 | Vv CSI data holding time Operation-resioring time.| _ tr l@ Frequency characteristics and current consumption characteristics M@ External dimensions (Unit: mm) toon | Refer to the data 20min. | 5 1234567890 2 holding timing . B (Von) and Voo are to have the same level of voltage. Do'not connect it to any external terminals. NC is not connected internally. ESS @ RTC-72421 72421 A +10 i pee | Ta=25C | 72421 B +50 Frequency tolerance: .-"| Af/fo * eas! Voo=5V | 72423 A +20 ppm 72423 +50 Frequency tem erature: - x eh sagen 0s. p (25C G10 OG re) +10/-120 Aging - cele | fa vo tv +5 max. ppm . . oS a Three drops on a -Shotk resistance. SR. | Rag poate from 75 om +10 max. ppm a Se 1/2 sine wave x3 directions Ol : ee : Ipp1 CSi=0V | Voo=5V 10 max. A urrent consumption, = Exclude input oy p ce nuit cure Vov=2V 5 max. 0 B Electrical characteristics _ e@ RTC-72423 "Hem so2 nd a Unit | apeecapls pps ve { Aye All inputs 16.3 max. H.input voltage | (1) Vint _ . y Al inputs L input voltage"). | Viva 0.8 CS Input leak-current. 0) het hy Vpo/0V _ +1 WA than Doto Ds 7 Input leak-current. {2)} [uke _ a L output voltage: (1) Vou |lor=2.5mA Do to Ds s H output voltage | Vox |lon=-400NA| 2.4 |v L" output voltage(2).] Voz |lo.=2.5mA 0.4 STDP _ Off leak current. SSA dork |V1=Vo0/0V] __ 10 } pA , ws 10 tees S Ly a = oA Input capacity SST Ott tag tO a pF $ a Tes Segoe requency 1 Me 20| Do to Ds oemx (2 i a a i A z sos j put voltage Ving Voo=2 to 55V 45 Yoo} y cs, 65 Ll input voltage: Viz _ 15 Voo BBBHL3H 002783 OTTOMm Register table a | &iolrm|-!o] Address Slo] Oo [OOO/O;oO a fos fafa _ E _ FY a) 4j)4}4 TEST | 24/12 | STOP 1] 1/0 tr to We wi BUSY} HOLD ITRPT sino | MASK REST 4- second 10- second 1- minute 40- minute 4- hour PM/AM,10- hours digit register 10 Control Register D Control Register E Control Register F O="L" level,1="H level, REST = RESET ITRPT/ STND=INTERRUPT/STANDARD 1) Bit does not exist. Please mask AM/PM bit with 10's of hours operations. Data Bit [PMA ) 3) Busy is read only. IRQ can only. IRQ can oy be set low (0). 4) REVSIND.. [eae Cad ae oe M Write mode (with ALE) Vu C81) Vit (CS4} CSi _/ tsu (CS1) tsu (A-ALE) fH (ALE-A) tu (csi)} -___- Ao to As Bi Vin VIL Vu CSo Do to Ds Ktw (ALE)} ALE Vin Vin Vit ~f \. _ isu (ALE-W) tw (w) tsu_(W-ALE) 5 WR Vin t VIL VIL ktsU (R-ALE) K- tsu (D-W) a tH_(w-D) \t ViH ViH 7+ VIH. Vic Hi Read mode (with ALE) A Vin (C81) KWH (CS1) CS: _/ tsu (csi) tsi ) (ALE) TH (ALE-A) - Ao to As WE 4/Vin tH (CS1} So VIL Vit kfw (ALE)>) ALE ViH ViH Novi Bn \ i PM ITRPT 0 AM STND = [isu (ALE RD | Su (FeALeD | 5) TEST bit should be 0. tre ye Switching characteristics (with ALE) tea ea) teva (Please connect ALE to Von if the microprocessor does not have an ALE output Do to Ds {ver very item i CSi setup time teu (cst) Address setup time before ALE tsu (A-ALE) 50 Address hold time after ALE tH (ALE-A) 50 ALE pulse width tw (ALE) 80 . woe ALE setup time before WATE | teu mew 0] lM Data holding timing ALE setup time before READ tsu (ALE-R) 0 V ALE setup time after WRITE tsu (W-ALE) 50 ALE setup time after READ - Tsu (R-ALE) 50 ns WRITE pulse width twiw) 120 oss DATA delay tirne after READ =| tezva-oy Ci=150pF| | 120 DATA Hold time afters READ. -\| tevzir-o) 0 70 CS1 < 1/5Voo Vine DATA setup timebefore WRITE || tsu ow 80 Data stora . \ : ge mode 1 DATA hold time after WRITE _ tH qw-0) 10} _ wgtice possible | | vith ae esse CS1 hold-time. 3.50 tuicst) 1000 terminals Le So or WR not occurred J) terminals READ/WRITE recovery time - TREC (RAY) 200 . (Von = 5V0.5V)} M Block diagram RD WR CS: ALE CSo Ao Ai Az As Do Di De Ds Min 1 | Min DIVIDER READ WRITE CONTROL Hout 1 10] Mon 1 Yea i | Yea 2aite we 3364234 0002784 13? mm. ADDRESS LATCH DATA BUS* BUFFER 4 ADDRESS DECODER 66