ELM621

SERIAL THREE BIT PORT

Description TheELM621isaseriallycontrolled,threebitparallelI/Oportinan8pinpackage.ThehighlevelofintegrationemployedmeansthatveryfewexternalcomponentsarerequiredinordertoconstructafullyfunctionalcircuitwiththisIC. Features ?LowpowerCMOSdesign-

ELM621

Serial Three Bit Port; ·Low power CMOS design – typically 1mA\n·High speed (9600 baud) RS232 communications\n·Standard ASCII commands and responses\n·16 byte receive buffer\n·Switchable pullup resistance\n·Minimum of external components required\n·External reset input\n·High current drive outputs – up to 25 mA\n;

The ELM621 is a serially controlled, three bit parallel I/O port in an 8 pin package. The high level of integration employed means that very few external components are required in order to construct a fully functional circuit with this IC.\n\n The ELM621 offers several convenient features that many users will appreciate. The provision of a 16 byte buffer allows commands to be chained and executed sequentially with one key stroke. The controllable pullup resistor on the bit 3 port pin is particularly helpful when interfacing to mechanical switches, while the ability to control character echo reduces overhead while operating under computer control. Naturally, individual as well as simultaneous read, set, clear and toggle commands are also supported.\n\n All communications with this device are via a standard 9600 baud serial?connection, using AT style commands. No special characters are required, so that virtually any terminal program can be used with the ELM621. More advanced users will be interested in operating this device under computer program control – simply a matter of writing to and reading from the device.\n\n

ELM621LA

30V 高效率 升壓 DC/DC轉(zhuǎn)換器; ? 電流模式控制\n? 過熱保護(hù)功能\n? UVLO功能\n? 輸入電壓范圍2.5V to 5.5V\n? 內(nèi)部電流限制1.45A\n? 關(guān)機(jī)電流<0.1μA\n? 固定頻率工作Typ.1.3MHz\n? 高効率90%\n? 封裝TSOT-25\n;

ELM621LA是一個固定頻率的、恒定電流方式工作的高效率升壓型DC/DC轉(zhuǎn)換器。 該IC 的頻率在內(nèi)部被設(shè)置為固定的1.3MHz。 另外，可以使用小型的表面貼裝的電感器和電容器?？梢栽?.7V～30V的電壓范圍內(nèi)恒定輸出電壓。 封裝采用的是小型的TSOT-25。

ELM621P

SERIAL THREE BIT PORT

Description TheELM621isaseriallycontrolled,threebitparallelI/Oportinan8pinpackage.ThehighlevelofintegrationemployedmeansthatveryfewexternalcomponentsarerequiredinordertoconstructafullyfunctionalcircuitwiththisIC. Features ?LowpowerCMOSdesign-

ELM621SM

SERIAL THREE BIT PORT

Description TheELM621isaseriallycontrolled,threebitparallelI/Oportinan8pinpackage.ThehighlevelofintegrationemployedmeansthatveryfewexternalcomponentsarerequiredinordertoconstructafullyfunctionalcircuitwiththisIC. Features ?LowpowerCMOSdesign-

ELM621LA

High efficiency 30V step up DC/DC converter

ELM621LA

High efficiency 30V step up DC/DC converter