- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384931 > ST16C650 (Exar Corporation) Voltage Regulator IC; Output Current Max:350mA; Supply Voltage Max:6V; Package/Case:8-TSSOP; Output Current:350mA; Output Voltage:3.3V; Current Rating:30.05A; Leaded Process Compatible:Yes; Output Voltage Max:3.3V RoHS Compliant: Yes PDF資料下載
參數(shù)資料
| 型號： | ST16C650 |
| 廠商： | Exar Corporation |
| 英文描述： | Voltage Regulator IC; Output Current Max:350mA; Supply Voltage Max:6V; Package/Case:8-TSSOP; Output Current:350mA; Output Voltage:3.3V; Current Rating:30.05A; Leaded Process Compatible:Yes; Output Voltage Max:3.3V RoHS Compliant: Yes |
| 中文描述： | 2.90V至5.5V UART的32字節(jié)FIFO |
| 文件頁數(shù)： | 21/53頁 |
| 文件大?。?/td> | 666K |
| 代理商： | ST16C650 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁當前第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁
á
REV. 5.0.0
ST16C650A
2.90V TO 5.5V UART WITH 32-BYTE FIFO
21
2.17
The 650A is designed to operate with low power consumption. A special sleep mode is included to further
reduce power consumption when the chip is not being used. All of these conditions must be satisfied for the
650A to enter sleep mode:
Sleep Mode & Wake-up Indicator
I
no interrupts pending 650A (ISR bit-0 = 1)
I
sleep mode is enabled (IER bit-4 = 1)
I
modem inputs are not toggling (MSR bits 0-3 = 0)
I
RX input pin are idling at a logic 1
The 650A stops its crystal oscillator to conserve power in the sleep mode. User can check the XTAL2 pin for
no clock output as an indication that the device has entered the sleep mode.
The 650A resumes normal operation by any of the following:
I
a receive data start bit transition (logic 1 to 0)
I
a data byte is loaded to the transmitter, THR or FIFO
I
a change of logic state on any of the modem or general purpose serial inputs: CTS#, DSR#, CD#, RI#
If the sleep mode is enabled and the 650A is awakened by one of the conditions described above, an interrupt
is issued by the 650A to signal to the CPU that it is awake. The lower nibble of the interrupt source register
(ISR) will read a value of 0x1 for this interrupt and reading the ISR clears this interrupt. Since the same value
(0x1) is also used to indicate no pending interrupt, users should exercise caution while using the sleep mode.
Once awakened, the 650A will return to the sleep mode automatically after any other interrupting condition (the
true cause of waking up the 650A) has been serviced. If the 650A is awakened by the modem inputs, a read to
the MSR is required to reset the modem inputs. In any case, the sleep mode will not be entered while an
interrupt is pending. The 650A will stay in the sleep mode of operation until it is disabled by setting IER bit-4 to
a logic 0.
A word of caution: owing to the starting up delay of the crystal oscillator after waking up from sleep mode, the
first few receive characters may be lost. The number of characters lost during the restart also depends on your
operating data rate. More characters are lost when operating at higher data rate. Also, it is important to keep
RX input idling at logic 1 or “marking” condition during sleep mode to avoid receiving a “break” condition upon
the restart. This may occur when the external interface transceivers (RS-232, RS-485 or another type) are also
put to sleep mode and cannot maintain the “marking” condition. To avoid this, the designer can use a 47k-100k
ohm pull-up resistor on the RX pin.
2.17.1
Sleep Mode in IR Mode
If operating in the infrared mode, the 650A will not wake up via the conditions described above. To exit out of
sleep mode, sleep mode must be disabled (IER bit-4 = 0).
相關PDF資料 |
PDF描述 |
|---|---|
| ST26C32CF16 | QUAD RS-422, RS-423 CMOS Differential Line Receiver |
| ST26C32 | MOSFET; Transistor Polarity:N Channel; Drain Source Voltage, Vds:20V; Continuous Drain Current, Id:13.4A; On-Resistance, Rds(on):0.0065ohm; Rds(on) Test Voltage, Vgs:4.5V; Package/Case:8-SOIC; Leaded Process Compatible:No |
| ST26C32CP16 | QUAD RS-422, RS-423 CMOS Differential Line Receiver |
| ST26C32IF16 | QUAD RS-422, RS-423 CMOS Differential Line Receiver |
| ST26C32IP16 | QUAD RS-422, RS-423 CMOS Differential Line Receiver |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ST16C650A | 制造商:EXAR 制造商全稱:EXAR 功能描述:2.90V TO 5.5V UART WITH 32-BYTE FIFO |
| ST16C650A_0508 | 制造商:EXAR 制造商全稱:EXAR 功能描述:2.90V TO 5.5V UART WITH 32-BYTE FIFO |
| ST16C650A_09 | 制造商:EXAR 制造商全稱:EXAR 功能描述:2.90V TO 5.5V UART WITH 32-BYTE FIFO |
| ST16C650ACJ44 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
| ST16C650ACJ44-F | 功能描述:UART 接口集成電路 UART W/32BYTE FIFO RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復。