 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
SP207H Datasheet(PDF) 7 Page - Sipex Corporation |
|
||||||||||||||||||||||||||||||
SP207H Datasheet(HTML) 7 Page - Sipex Corporation |
|
|
7 / 14 page  7 TGoddard/SP207H/9614R0 SP207H/SP211H High–Speed Transceivers © Copyright 2000 Sipex Corporation Power Receiver SD EN Up/Down Outputs 0 0 Up Enable 0 1 Up Tri–state 1 0 Down Tri-state 1 1 Down Tri–state SHUTDOWN MODE The SP207HB, SP211H and SP211HB all fea- ture a control input which will disable the device and reduce the power supply current to less than 10 µA, making the parts ideal for battery–pow- ered systems. In the “shutdown” mode the re- ceivers and transmitters will both be tri–stated. The V+ output of the charge pump will discharge to V CC , and the V – output will discharge to ground. For complete shutdown to occur and the 10 µA power drain to be realized, the following condi- tions must be met: • +5V must be applied to the SD pin • ENABLE must be either 0V, +5.0V or not connected • the transmitter inputs must be either +5.0V or not connected • V CC must be +5V • Receiver inputs must be >0V and <+5V ENABLE The SP207HB, SP211H and SP211HB feature an enable input pin, which allows the receiver VCC = +5V +10V VSS Storage Capacitor VDD Storage Capacitor C1 C2 C3 C4 + + ++ – – – – Table 2. Truth Table for SP2xxH Power Receiver SD EN Up/Down Outputs 0 0 Up Enable 0 1 Up Tri–state 1 0 Down Enable 1 1 Down Tri–state Table 3. Wake–Up Truth Table for SP2xxHB Figure 5. Charge Pump — Phase 4 outputs to be either tri–stated or enabled. This can be especially useful when the receiver is tied directly to a microprocessor data bus. The en- able is active low; that is, 0V applied to the ENABLE pin will enable the receiver outputs. WAKEUP FUNCTION The SP207HB and SP211HB have a wake–up feature that keeps all the receivers in an enabled state when the device is in the shutdown mode. With only the receivers active during shutdown, the devices draw 5–10 µA of supply current. A typical application of this function would be where a modem is interfaced to a computer in a power–down mode. The ring indicator signal from the modem could be passed through an active receiver that is in the shutdown mode. The ring indicator signal would propagate through the receiver to the power management circuitry of the computer to power up the micro- processor and the SP207HB/SP211HB drivers. After the supply voltage to the transceivers reaches +5.0V, the SHUTDOWN pin can be disabled. All receivers that are active during shutdown maintain 500mV (typ.) of hysteresis. |
Similar Part No. - SP207H |
|
Similar Description - SP207H |
|
|
|
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
