 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
MAX14850AEE+ Datasheet(PDF) 13 Page - Maxim Integrated Products |
|
|
|||||||||||||||||||||||||||||
MAX14850AEE+ Datasheet(HTML) 13 Page - Maxim Integrated Products |
|
|
13 / 17 page  Level Shifting The MAX14850 tolerates a ground difference of 600VRMS. Therefore, VGNDA can be 850VDC higher or lower than VGNDB. In addition, the device translates logic levels when (VCCA–VGNDA) is higher or lower voltage than (VCCB–VGNDB), as long as each is within the valid 3.0V to 5.5V range. Unidirectional and Bidirectional Channels The MAX14850 operates both as a unidirectional device and bidirectional device simultaneously. Each unidirec- tional channel can only be used in the direction shown in the functional diagram. The bidirectional channels func- tion without requiring a direction control input. Unidirectional Channels The device features four unidirectional channels that operate independently with guaranteed data rates from DC to 50Mbps. The output driver of each unidirectional channel is push-pull, eliminating the need for pullup resis- tors. The outputs are able to drive both TTL and CMOS logic inputs. Bidirectional Channels The device features two bidirectional channels that have open-drain outputs. The bidirectional channels do not require a direction control input. A logic-low on one side causes the corresponding pin on the other side to be pulled low while avoiding data latching within the device. I/OA1 and I/OA2 outputs comprise special buffers that regulate the logic-low voltage at approximately 0.7V. The input logic-low threshold (VIT) of I/OA1 and I/OA2 is at least 50mV lower than the output logic-low voltage of I/OA1 and I/OA2. This prevents an output logic-low on side A from being accepted as an input low and subsequently transmitted to side B, thus preventing a latching action. I/OB1 and I/OB2 are conventional outputs that do not regulate the logic-low output voltage. Due to their nature, the MAX14850 A-side output buffers cannot be connected together or to a device with similar buffers or rise time accelerators. However, the MAX14850 B-side output buffers can be connected together or to any other bidirectional buffer or level translator. The I/OA1, I/OA2, I/OB1, and I/OB2 pins have open-drain outputs, requiring pullup resistors to their respective supplies for logic-high outputs. The output low voltages are guaranteed for sink currents of up to 30mA for side B, and 10mA for side A (see the Electrical Characteristics table). Startup and Undervoltage Lockout The VCCA and VCCB supplies are both internally monitored for undervoltage conditions. Undervoltage events can occur during power-up, power-down, or during normal operation due to a slump in the supplies. When an undervoltage event is detected on either of the supplies, all outputs on both sides are automatically controlled, regard- less of the status of the inputs. The bidirectional outputs become high impedance and are pulled high by the external pullup resistor on the open-drain output. The unidirectional outputs are pulled high internally to the voltage of the VCCA or VCCB supply during undervoltage conditions. When an undervoltage condition is detected on either supply, all unidirectional outputs are pulled to the supplies (Table 1). The bidirectional outputs are high impedance and pulled to the supplies by the external pullup resistors. Figure 3 shows the behavior of the outputs during power- up and power-down. Safety Regulatory Approvals The MAX14850 is safety certified by UL, CSA, and IEC 60747-5-2. Per UL1577, the MAX14850 is 100% tested at an equivalent VISO of 720VRMS for one second (see Table 2). Table 2. Safety Regulatory Approvals Table 1. Output Behavior During Undervoltage Conditions VIN VCCA VCCB VOUTA_ VOUTB_ 1 Powered Powered 1 1 0 Powered Powered 0 0 X Undervoltage Powered Follows VCCA 1 X Powered Undervoltage 1 Follows VCCB SAFETY AGENCY STANDARD ISOLATION NUMBER FILE NUMBER UL UL1577 Recognized 600VRMS isolation voltage for 60 seconds E351759 MAX14850 Six-Channel Digital Isolator www.maximintegrated.com Maxim Integrated │ 13 |
Similar Part No. - MAX14850AEE+ |
|
Similar Description - MAX14850AEE+ |
|
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
