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參數(shù)資料
| 型號： | XR16C854DCV-F |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 14/53頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC UART FIFO 128B QUAD 64LQFP |
| 標(biāo)準(zhǔn)包裝： | 160 |
| 特點(diǎn)： | * |
| 通道數(shù)： | 4，QUART |
| FIFO's： | 128 字節(jié) |
| 規(guī)程： | RS232，RS485 |
| 電源電壓： | 2.97 V ~ 5.5 V |
| 帶自動(dòng)流量控制功能： | 是 |
| 帶IrDA 編碼器/解碼器： | 是 |
| 帶故障啟動(dòng)位檢測功能： | 是 |
| 帶調(diào)制解調(diào)器控制功能： | 是 |
| 帶CMOS： | 是 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 64-LQFP |
| 供應(yīng)商設(shè)備封裝： | 64-LQFP（10x10） |
| 包裝： | 托盤 |
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XR16C854/854D
21
REV. 3.1.0
2.97V TO 5.5V QUAD UART WITH 128-BYTE FIFO
The 854 resumes normal operation by any of the following:
s
a receive data start bit transition (logic 1 to 0)
s
a data byte is loaded to the transmitter, THR or FIFO
s
a change of logic state on any of the modem or general purpose serial inputs: CTS#, DSR#, CD#, RI#
If the 854 is awakened by any one of the above conditions, it will return to the sleep mode automatically after
all interrupting conditions have been serviced and cleared. If the 854 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 in any channel. The 854 will stay in the sleep mode of operation until it is disabled by
setting IER bit-4 to a logic 0.
If the address lines, data bus lines, IOW#, IOR#, CSA#, CSB#, CSC#, CSD# and modem input lines remain
steady when the 854 is in sleep mode, the maximum current will be in the microamp range as specified in the
DC Electrical Characteristics on page 41. If the input lines are floating or are toggling while the 854 is in sleep
mode, the current can be up to 100 times more. If any of those signals are toggling or floating, then an external
buffer would be required to keep the address, data and control lines steady to achieve the low current.
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. Also, make sure the RX input is idling at logic 1 or “marking” condition
during sleep mode. This may not 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 system design
engineer can use a 47k ohm pull-up resistor on the RX A-D inputs.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XR16C854DCVTR-F | 制造商:Exar Corporation 功能描述:UART 4-CH 128Byte FIFO 3.3V/5V 64-Pin LQFP T/R 制造商:Exar Corporation 功能描述:XR16C854DCVTR-F |
| XR16C854DIV | 制造商:EXAR 制造商全稱:EXAR 功能描述:2.97V TO 5.5V QUAD UART WITH 128-BYTE FIFO |
| XR16C854DIV-F | 功能描述:UART 接口集成電路 UART 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 |
| XR16C854DIV-F | 制造商:Exar Corporation 功能描述:IC QUAD UART 2MBPS 5.5V 64-LQFP |
| XR16C854DIVTR-F | 制造商:Exar Corporation 功能描述:UART 4-CH 128Byte FIFO 3.3V/5V 64-Pin LQFP T/R 制造商:Exar Corporation 功能描述:XR16C854DIVTR-F |
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