Electronic Components Datasheet Search |
|
NCV7349D10R2G Datasheet(PDF) 5 Page - ON Semiconductor |
|
NCV7349D10R2G Datasheet(HTML) 5 Page - ON Semiconductor |
5 / 12 page NCV7349 www.onsemi.com 5 Over−temperature Detection A thermal protection circuit protects the IC from damage by switching off the transmitter if the junction temperature exceeds a value of approximately 170 °C. Because the transmitter dissipates most of the power, the power dissipation and temperature of the IC is reduced. All other IC functions continue to operate. The transmitter off−state resets when the temperature decreases below the shutdown threshold and pin TxD goes high. The thermal protection circuit is particularly needed when a bus line short circuits. TxD Dominant Time−out Function A TxD dominant time−out timer circuit prevents the bus lines being driven to a permanent dominant state (blocking all network communication) if pin TxD is forced permanently low by a hardware and/or software application failure. The timer is triggered by a negative edge on pin TxD. If the duration of the low−level on pin TxD exceeds the internal timer value tdom(TxD), the transmitter is disabled, driving the bus into a recessive state. The timer is reset by a positive edge on pin TxD. This TxD dominant time−out time (tdom(TxD)) defines the minimum possible bit rate to 15 kbps. Fail Safe Features A current−limiting circuit protects the transmitter output stage from damage caused by accidental short circuit to either positive or negative supply voltage, although power dissipation increases during this fault condition. Undervoltage on VCC pin prevents the chip sending data on the bus when there is not enough VCC supply voltage. After supply is recovered TxD pin must be first released to high to allow sending dominant bits again. Recovery time from undervoltage detection is equal to td(stb−nm) time. VIO supply dropping below VUVDVIO undervoltage detection level will cause the transmitter to disengage from the bus (no bus loading) until the VIO voltage recovers (NCV7349−3 version only). The pins CANH and CANL are protected from automotive electrical transients (according to ISO 7637; see Figure 7). Pins TxD and STB are pulled high internally should the input become disconnected. Pins TxD, STB and RxD will be floating, preventing reverse supply should the VIO supply be removed. |
Similar Part No. - NCV7349D10R2G |
|
Similar Description - NCV7349D10R2G |
|
|
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 |