BU45K272G-TL ROHM

Datasheet Voltage Detector IC Series Counter Timer Built-in CMOS Voltage Detector IC BU45Kxxxx, BU46Kxxxx, BU45Lxxxx, BU46Lxxxx series Key Specifications General Description Detection voltage: 2.3V to 4.8V (Typ.) ROHMs BU45xxxxx and BU46xxxxx series are highly 0.1V steps accurate, low current consumption voltage detector IC High accuracy detection voltage: 1.0% series. Because the counter timer delay circuit is built-in, Low current consumption: 2.3A (Typ.) an external capacitor for the delay time setting is Operating temperature range: -40C to +105C unnecessary. Two output types are available (Nch open Two internal, fixed delay time: 200ms drain and CMOS output) and detection voltages range 400ms from 2.3V to 4.8V in increments of 0.1V with fixed delay time of 200ms and 400ms, that may be selected Package according to application. Features SSOP3 2.92mm x 2.80mm x 1.25mm Counter Timer Built-in No delay time setting capacitor required Low current consumption Applications Two output types (Nch open drain and CMOS output) Circuits using microcontrollers or logic circuits that require Package SSOP3 is similar to SOT-23-3 (JEDEC) a reset Typical Application Circuit V DD1 VDD1 V DD2 R L Micro Micro BD46 xx x xx R ST controller BU45 x x x xx R ST controller C L CL Noise-filtering Noise-filtering Capacitor Capacitor GND GND Open Drain Output Type CMOS Output Type BU45xxxxx series BU46xxxxx series Connection Diagram Pin Descriptions BU45KxxxG / BU46KxxxG SSOP3 PIN No. Symbol Function GND VDD 1 GND GND 3 3 2 VOUT Reset Output 3 VDD Power Supply Voltage TOP VIEW BU45LxxxG / BU46LxxxG 1 2 1 2 PIN No. Symbol Function VOUT VDD GND VOUT 1 VOUT Reset Output BU45KxxxxxxG xxxxxx BU45LxxxxxxxxxxxxG 2 VDD Power Supply Voltage BU46KxxxxxxxxxxxxG BU46LxxxxxxxxxxxxG 3 GND GND Product structureSilicon monolithic integrated circuit This product is not designed for protection against radioact ive rays. www.rohm.com 2014 ROHM Co., Ltd. All rights reserved. TSZ02201-0R7R0G300130-1-2 TSZ2211114001 1/15 03.July.2014 Rev.005 Datasheet BU45Kxxxx, BU46Kxxxx, BU45Lxxxx, BU46Lxxxx series Ordering Information BBBB UUUU xxxx xxxx xxxx xxxx xxxx xxxx xxxx ---- TTTT LLLL Part Output Type Package 1 Reset Voltage Value Counter Timer Package 2 Packaging and Number 45 : Open Drain 23 : 2.3V Delay Time Settings forming specification 46 : CMOS 0.1V step 2 : 200ms TL : Embossed tape 48 : 4.8V 4 : 400ms and reel Package 1 Package 2 Package name K G SSOP3 (1pin GND) L G SSOP3 (3pin GND) Lineup Table 1. Open Drain Output Type Counter Timer Delay Time Settings 1-Pin GND 3-Pin GND 200ms 400ms 200ms 400ms Detection Part Part Part Part Marking Marking Marking Marking Voltage Number Number Number Number 4.8V bH BU45K482 eF BU45K484 hD BU45L482 nB BU45L484 4.7V bG BU45K472 eE BU45K474 hC BU45L472 nA BU45L474 4.6V bF BU45K462 eD BU45K464 hB BU45L462 mY BU45L464 4.5V bE BU45K452 eC BU45K454 hA BU45L452 mX BU45L454 4.4V bD BU45K442 eB BU45K444 gY BU45L442 mW BU45L444 4.3V bC BU45K432 eA BU45K434 gX BU45L432 mT BU45L434 4.2V bB BU45K422 dY BU45K424 gW BU45L422 mS BU45L424 4.1V bA BU45K412 dX BU45K414 gT BU45L412 mR BU45L414 4.0V aY BU45K402 dW BU45K404 gS BU45L402 mP BU45L404 3.9V aX BU45K392 dT BU45K394 gR BU45L392 mN BU45L394 3.8V aW BU45K382 dS BU45K384 gP BU45L382 mM BU45L384 3.7V aT BU45K372 dR BU45K374 gN BU45L372 mK BU45L374 3.6V aS BU45K362 dP BU45K364 gM BU45L362 mH BU45L364 3.5V aR BU45K352 dN BU45K354 gK BU45L352 mG BU45L354 3.4V aP BU45K342 dM BU45K344 gH BU45L342 mF BU45L344 3.3V aN BU45K332 dK BU45K334 gG BU45L332 mE BU45L334 3.2V aM BU45K322 dH BU45K324 gF BU45L322 mD BU45L324 3.1V aK BU45K312 dG BU45K314 gE BU45L312 mC BU45L314 3.0V aH BU45K302 dF BU45K304 gD BU45L302 mB BU45L304 2.9V aG BU45K292 dE BU45K294 gC BU45L292 mA BU45L294 2.8V aF BU45K282 dD BU45K284 gB BU45L282 kY BU45L284 2.7V aE BU45K272 dC BU45K274 gA BU45L272 kX BU45L274 2.6V aD BU45K262 dB BU45K264 fY BU45L262 kW BU45L264 2.5V aC BU45K252 dA BU45K254 fX BU45L252 kT BU45L254 2.4V aB BU45K242 cY BU45K244 fW BU45L242 kS BU45L244 2.3V aA BU45K232 cX BU45K234 fT BU45L232 kR BU45L234 www.rohm.com 2014 ROHM Co., Ltd. All rights reserved. TSZ02201-0R7R0G300130-1-2 TSZ2211115001 2/15 03.July.2014 Rev.005