PST518A

PST518A MITSUMI | Alldatasheet

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MITSUMI ELECTRIC CO LTD 48E D M® 6250275 0001533 STS Mm MECU . wer) Z- / / Fy eA 5 1 VAFLULYEA/For System Resetting Monolithic IC PST518A, PST518B, PST519A onolithic , ; 2 2 PSTSI8A, 518B, SIVAIL, SEX"RCPUYAFASLO — Function of PSTSI8A, 518B, 519A are accurately resetting the WOODY YIVYAF ACE T, BHR CREME CERES system after detecting voltage at the time of switching power FEX BRL, MRICV ty hep SME EOI CTH. on and instantaneous power off in various CPU systems and other logic systems. BBE QBFEATURES Dey b HD AMRALE & CARB Resetting output can be guaranteed down to low voltages. 2) WA 7 MMA SW, (Max. 300mA) (2) Output sinking current is large. (Max. 300mA) 0.2V) 4.4V £0, 2V) (4) 1947 (PST518) £2WHI4 7 (PSTSI9) 4:4 (4). One-output type (PSTS518) and two-output type (PST519) bet. are available. 5) PSTSI8&7—EYF HAT EHDOEF, (5) Taping type PST518 is also available. ies BBAPPLICATIONS () SRON—OF FRORMD EAR. (1) As measure against erroneous operation at power ON-OFF 2) RROMMBIC LEY AF LOREM, operations, ; 8) WROMMIHS RY AF AORM) ty MEST, (2) As measure against system runaway by instantaneous power oe interruption or the like. ( Ax F IAD IP 7 DENRA) OME, (3) For generating common resetting signals for some system with plural number of equipment connected to it. (4) As the control circuit for memory with battery backup. 1955) 2 B/DIMENSIONS t ) chef | (PST518A, PST518B) (PST519A) SPEQUIVALENT CiRCUIT S2max, 4Qrax._ r 1 | Lot. No, (PST518A, PST518B) a | Cy} s “ ‘ TSISA 6 Pn is © oui 08raxdil TooG I : ' 4 @sno 055i, og) 50a 2 10.3max. 16203, i ia a i a — [PSTSI9A) con fl * QDvee eae mam Fil pt OM Ste | al e rebp Ep Oot J hn 254025 lToas Reno [ek Ono 254 FU5/e-—4 2 1148 E-09 a. lala mf

r IMITSUMI ELECTRIC CO LTD 48E D M® 6250275 0001534 431 MB MECI Tari MITSUMI ox COMPONENTS 4| MONOLITHIC IC WEIR KIER /MAXIMUM RATING ThE /item 123/Symbol | 524% /Rating BAST /Unit Brae Operating Temperature Topr 204475 c RABE Storage Temperature Tstg —30~ +125 c aman Power Dissipation Pd (@PSTsI9Aes00mw)| Eva td Output Current In 300 mA e@ RARE Supply Voltage Vee 03-470 | Vv | MOMS HSS HE /ELECTRICAL CHARACTERISTICS of PST518A, PST519A (Ta=25°C) AE. whe Bone | ccc EEE usin | AR, | 8 BA. MAE RUBE Detecting Voltage Vs | Ri=1kQ Vorx0.4V} 4.0 4.2 4.4 | v A-LAIEARE Low-Level Output Voltage Vou Ri=500 04 | V BAY —F Rat Output Leakage Current Ton | Vee=5.25V | 60 | pA EXFULARE Hysteresis Voltage AVs | Ri=1k9 | 100 | mv RAMEE CSTR U8e Temperate | Vesa | Rum aka | £0.01 | | %/e Toot | Ru=500, Vec=3.9V 6 10 | mA r ) Icon | Ru=50Q, Vec=5. 25V 9 13 mA . Ri=1000 - a eR Threshold Operating Voltage Vork | vi <0. 4v 08 | 1.0 v Ri=1002 - —_ 3 "L" G2MEMEBGNY "L” Transmission Delay Time tpHL Veo=4, 6V—+3. 8V. 03 | “S C1i=100pF p10 Po 3 "H" f532ERERM “H” Transmission Delay Time tpLH | Vec=3.8V—+4.6V 0.5 us | Cy=100pF , R=1009 [ ee Response Time | eLt009F 0.5 2S

1149 E-10 MITSUMI COMPONENTS 3

MITSUNI ELECTRIC CO LTD 48E D Mm@ 6250275 0001535 378 MEMECU T-GA-i we ‘ETE SAS HE/ELECTRICAL CHARACTERISTICS of PST518B JHB. hE Fog | rn ERE rnin | ARMS. | BER. | A, | BE item ‘Symbol | “Measuring Conditions | “Min. | “Typ. | “Max. | “Min. BHRE Detecting Voltage Vs Ri=1kQ Vor<0.4V | 42 | 44 4.6 Vv A-LA HME Low-Level Output Voltage Vou | Ri=500 0.4 HAY R Output Leakage Current Tou Vee=5. 25V 60 EXFULARE Hysteresis Voltage AVs | Ri=1kQ 100 | mV @ sumemmmem Detecting Voltage Temperature | ve/nt Rp =1k0 £0.01 %/C Tec [R= SOR, Ver=3.9V | 6 | «10 sma Rae Power Supply Current | —|—_| - Teen | Ru=509, Vec=5. 25V ;} 9 | 13 | ma Ri=1000 | re DP RARE Threshold Operating Voltage Voot Vax av 08 10) Vv 7 | Ru=1000 | | 3K “L” GEIRERRAD “L” Transmission Delay Time tpHL Veo=4, 8V—+4. 0V 0.3 | us Cx =100pF | Ri=1009 | 3 "H" Ge38ETERM «“H” Transmission Delay Time tpLH Vee=4, 0V—+4, 8V 0.5 us C=100pF ‘| Ri=1002 ae B eae neny Response Time tr C1=100pF 0.5 2S (Note) + t2i8s5S091i/ Transmission Response Time r )

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MITSUMI ELECTRIC CO LTD 4BE D MM@ 6250275 D00153b 204 MB MECJ T-6aruU MITSUMI ay COMPONENTS 445| MONOLITHIC IC 9BPSTS18 RUE BIER/MEASURING CIRCUIT PST519 BE LRK/ MEASURING CIRCUIT © ® o a, 08 o> TODO? oa, e heo q & Peep eS ry \\ oc © L 4 q r © o) R aR viel Post Re Care c c Esv eo wofpel ® CRT |itete) ® esl [est L@+ cat Boyt J oc ” 519 L)+— ~CRT KOvz © @ 100pF PG VE @) (e) CLG _ FdpF] 100pF (Note) C: 54 S2aYF YH 0.01~F~10uF OBACBRO (Note] C : By-pass condenser are to be selected optionally RIC LO ERICERMW ET, within the 0.0luF-to-10uF range depending on the condition of the power supply. Al, A2, A3: TEM MRt/DC ammeters ‘V1: Hekm ER /DC voltmeter 46V PG: Awav2hU—¥ /Pulse generator 3.8V CRT: tya 23-7 Oscilloscope ov —_____ SW : RHE OME /For measuring detecting voltage, etc SW@® : BAER AGM iE /For measuring delay time. KICREZO7 TIF —YaviCMALBSCLL, ARRRE In order to achieve compatibility with all sorts of application HE AHAGATVREDHLTSES) EMKTSTLOUEHLM —and to meet the need for eliminating external adjusting factors RTO, < OF 1 —V FRE S Lic VopL=0. 8V typical), (for example, needing external VR), VopL=0. 8V (typical) and Vs=4.2V/4.4V (typical) KRHESHCHOEF, ERMDHIY Vs=4.2V/4.4V (typical) have been adopted on the basis of t ) YYAS A 300MA (max.) OY Y IMBAXATS Kw, Bik vy large volumes of field data. Also, as the output transistor has E-FYA2OEVOMEMMT St Lace ET, 300mA (max.) sinking capacity, it is capable of direclty driving low-impedance circuits. seta MITSUMI COMPONENTS 5

MITSUMI ELECTRIC CO LTD 48E D m@ &250275 0001537 140 mE MECUT-GQ-1] DO Rw RE LRAT SAR/THE METHOD of CHANGING THE DETECTING VOLTAGE BREE Vs=4.2V 2B LT V’s=4.75V Etow The method of changing the detecting voltage Vs=4.2V into %. (FRESH) V's=4.75V by using external component parts. (see figure at Ry 222 Vs below) Veo Me R Nee 418 4208: PST R,=220 R A Re=1200 az LS) Rv=2. 2k 0)... CRBC CRE | GND ‘Set by means of GND © \\ variable resistor | @ Tee C OMe Vs EBFSBA, KHESSCUT (Ri 4 220 In addition, when Vs is to be changed, determine Re and Rv &L), Re Rv®REBLTFS YY with Ri set at 22Q using the equation below as reference vi Vee & bere Vs VRi=Ri x (hth) =V's—Vs WOR fh Ty ye _W8=Vo-Ri hs . | aa R518 Rui Rv=— Vis—Vs-Ri hh GND o Where, V's : RABE V's: New detecting voltage Vs :PSTSI8/19ID4 vy 4 7RBE Vs_: Sensing voltage of PST518/519 Ry :RetRv Ro’ : Ret+Ro GDRBSMIC KSI FF » DEB A/DYNAMIC RESPONSE CHARACTERISTICS FOR Voce Vg=2400m 10° cal Sy 8 | 4 210 Zo ha PRM ia oy MY 2, Ae SAW ik HE EM £10 yy =H" Transmission delay time — = Are oe

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MITSUMI ELECTRIC CO LTD 48E D Mm 6250275 0001538 087 me necuT-b2-l/ = COMPONENTS <%5| MONOLITHIC IC @ OH teRAHBL/Threshold Operating Voltage WV s-i #5 tE/Vs-Temperature Charac. 08 4.25 a CTT a aan eof e > = aL 71 = se PRBS LZ [| ws lL | TT TTT | 0 02 04 06 08 10 12 14 -20 ~10 0 10 20 30 40 50 60 10 8 r ) Vee (VD Ambient Temperature (°C) PST519 ©#hf/Operating of PST519 +5 VOMMBE (Mth, Vec) 25 Vs WE CH SCL Mich It undertakes high-speed detection of the fact that +5V power MFSEOCH, DLICHLAECL< Vee wi Vepr~Vs OMICS supply voltage (Vcc in the figure) is below Vs. As shown in SEK, OUTL, OUT2 LSM NK IYYAYON (3YH7 Fig. 1, when Vee lines between Vop. and Vs, the output Yay) RMLEO, Voor UF EI Vs WEOMOL Sie, IH transistor of both OUT1 and OUT2 wassume the state of ON UPFVVASMOPFRELEOEF, Hib dBRO5 VATE (state of conduction), but when it is below Vopt or above Vs, DI CMA< MTEL AREA Von UFCHO, RBH EES the output transistors assume the state of OFF. In other words, LBS MERA Vop.~Vs OCH oC, Vs LECAO1 CORK the voltage on which ICs normally operating on 5V do not SABES CR CHERORES SRL TSCLE AML LT — operate at all is lower than Vopt, and the range with possibility vet. of causing abnormal operation lies between Vopt and Vs. The object is the range above Vs but in which the IC normally operates up to the maximum working voltage of the IC. Vs: Sensing Voltage e Vopt : Operating Voltage ec AE YT ' i i ro V t ret ON FR TONY 0FE t i} ti t — a (Fig. 1) PST519 D&h/E /Operation of PSTS19 ss ects MITSUMI COMPONENTS 1

MITSUMI ELECTRIC CO LTQ.NBE D Mf G250275 0001539 T13 mE MECUT-GOQ-I) war, J6 FAL /APPLICATIONS WNI--svF4l-BK @Power-ON Delay Circuit W2MLPSTHIAVRAI— + ty +74 V-HBCH 9, Fig. 2 represents the power-ON delay circuit using PSTS19. +5 VERAONSHCHOL CBRMBEAIDED, Vs ici The power supply voltage rises as in the figure when the +5V LRM 3.36F Dave voiFe—Y+ Fo Se MLE power supply is switched ON, and when it reaches Vs, 3¢F WEOF « V—BYM] RESET (PS eM ILED, *xMNY Vs LI capacitor charging up begins and outputting of the prescribed FE CEREEM TA RMAa, ay FYHMPSTSI9€BUT — delay time RESET signals is executed. Also, when the power BMICF 1 AF 4 —VP SB, HED RESET (EH LWATSS supply voltage instantaneously drops below Vs, the capacitor r ) EMTS ES, Hot, PHOS VHHOICAARHERCL begins sudden discharge, thus producing required RESET 9S REM EC. RCO MBMEDE ELBA, Bbc RESET signals. As a consequence, in case the power supply voltage WSEHAL, POMEOFS 1 V-BMMNLRAT SMEL RO drops to the level that causes abnormal operation of the IC zt. normally operating at 5V, RESET signals are immediately put out and the required delay time output is maintained. +5y 1oKg — TALS14 A bd be 5 > cumase V7" rt r BST outs and I Power Supply A} i but: F3.3uF Voltage it it Ol d nest |] co O88 Other Circuit (Fig. 2} PST519 #AW-NT— + ty 4 V—[EIR/Power-ON delay circuit

88085 M RESET BIR (Reset Circuit of 8085

W3QrT4 70» 70 y $8085D RESET IN FHOPIe RL “Fig. 3 shows an example of the RESET IN circuit of the e Chit, Mid (2-1 427-44 -F4V-BRL RRO microprocessor 8085 hardware resetting by going through the PRPS LICL oT, BBSON—K + 92% + Jey be same operation as the power-ON delay circuit described in 2-1 ES. ot, MRRLORMEPICHL TS FO 7LORER above. As a consequence, program runaway can be prevented BRC CERARL OES. even against instantaneous drop in the power supply voltage. le i “ + J 8085 vm VBig|Or 47 |, | Reset in ap GND ” mm toGR Other Circuit (Fig. 3) 8085 D Reset %/Reset circuit of 8085 a ee 8 1154 F-01 Fhe FH a

iMITSUMI ELECTRIC CO LTD 4Y8E D MM 6250275 0001540 735 a MECLT=Ga-// an COMPONENTS <t5| MONOLITHIC IC WNI- ty -F 4 L-BROERICNTS @Examination of the Constants of Power-ON SR Delay Circuit +5 VERE P ST519D Vs ¥CTML, Hb LAehD A delicate case in which the +5V power supply voltage drops DLIBBORBUMESBAMEL NET, COA, 4M down to Vs of PST519 and immediately begins to rise is KALELACIYF VIMERF 4 AF e-VRTL Yaiy conceivable. In this case, the capacitor may not execute full beh IHL COD + VRVECTCH HAY + Fy TREFSS discharge, as shown in the figure, and may turn to charging EMBOBED. PhbbI COL AF IYAROART, RESET up to the low level of the Schmidt trigger IC. In other words, OAM AMAR ST SRR, UV AHO T— ZL IED, determination of the RESET pulse width only with the hysteresis OBS TCEYAFAMYBLPSAV AMA BRA NO ER component of the IC leads to the case of minimum pulse width. Ay thot, Yalyh+ HIM LCORMCEURC, ROEM Even in such a case, however, the pulse width the system e@ OREHABEL<, HILO CMOS HROMAAAD1 yL—¥ requires must be assured. Conequently, determination of the YADEMICBWOIED, 1 COAAMHICHS SMMRAELEALW required numbers of capacitors and resistors compatible with DERAD, TTLOBARANRMIC LEC LF e+ Pur the characteristics of the Schmidt trigger IC is desirable. In the BRMMATE VEL, ERAUECS, case of CMOS circuit shown in Fig. 3, practically no consideration on the input current of the IC is needed as the input impedanse is very high, but careful attention should paid to the case of TTL as the charge-up factor attributable to the input current becomes a value that cannot be ignored. CMOS SVEREE i Vs Ry WEREE ___. : Lt te 7, 4584 Power Supply Voltage i Z |est nus, > hese! : $19} Out: c ‘ +V GND il Input Voltage of 4604 = VIL~---- ==> ql 7 nitage of OB Other Circuit Reet e (40M) RESET 4 26 (Fig. 4) Example of operation with PRHOBER minimum RESET pulse width. uss F-02 MITSUMI COMPONENTS 9