參數(shù)資料
型號(hào)： XR19L222IL64-0B-EB
廠商： Exar Corporation
文件頁數(shù)： 45/53頁
文件大?。?/td> 0K
描述： EVAL BOARD FOR XR19L202 64QFN
標(biāo)準(zhǔn)包裝： 1
系列： *
XR19L222
5
REV. 1.0.1
TWO CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER
ANCILLARY SIGNALS (CMOS/TTL Voltage Levels)
XTAL1
18
I
Crystal or external clock input. This input is not 5V tolerant.
XTAL2
19
O
Crystal or buffered clock output. This output may be use to drive a clock buffer which can
drive other device(s).
PwrSave
14
I
Power-Save (active high). This feature isolates the L222’s data bus interface from the host
preventing other bus activities that cause higher power drain during sleep mode. See Sleep
Mode with Auto Wake-up and Power-Save Feature section for details.
ACP
25
I
Autosleep for Charge Pump (active HIGH). When this pin is HIGH, the charge pump is shut
off if the L222 is already in partial sleep mode, i.e. the crystal oscillator is stopped.
I/M#
30
I
Intel or Motorola Bus Select.
When I/M# pin is HIGH, 16 or Intel Mode, the device will operate in the Intel bus type of
interface.
When I/M# pin is LOW, 68 or Motorola mode, the device will operate in the Motorola bus
type of interface.
RESET
(RESET#)
47
I
When I/M# pin is HIGH for Intel bus interface, this input becomes RESET (active high).
When I/M# pin is LOW for Motorola bus interface, this input becomes RESET# (active low).
A 40 ns minimum active pulse on this pin will reset the internal registers and all outputs of
the UART. The UART transmitter output will be held HIGH, the receiver input will be ignored
and outputs are reset during reset period (see
C2+
C2-
46
45
-
Charge pump capacitors. As shown in
Figure 1, a 0.1 uF capacitor should be placed
between these 2 pins.
C1+
C1-
52
51
-
Charge pump capacitors. As shown in
Figure 1, a 0.1 uF capacitor should be placed
between these 2 pins.
VREF+
53
Pwr +5.0V generated by the charge pump.
VREF-
27
Pwr -5.0V generated by the charge pump.
R_EN
24
I
When the supply voltage is < 3.6V, connect R_EN to VCC.
When the supply voltage is > 3.6V, connect R_EN to GND.
C3A
C3B
55
56
I
When the supply voltage is 3.3 V, C3A and C3B should be connected to VCC.
When the supply voltage is 5 V, C3A should be connected to C3B with a 1 uF capacitor to
GND.
RXBSEL
8
I
When RXBSEL is HIGH, RXB is the input to the receiver of the UART.
When RXBSEL is LOW, RXDB is the input to the receiver of the UART.
FAST
21
I
When FAST is HIGH, the maximum serial data rate is 1 Mbps.
When FAST is LOW, the maximum serial data rate is 250 Kbps.
VCC
48, 54
Pwr 3.3V to 5.5V power supply. All CMOS/TTL input pins, except XTAL1, are 5V tolerant.
GND
2, 17, 22,
35
Pwr Power supply common, ground.
Pin Descriptions
NAME
64-QFN
PIN#
TYPE
DESCRIPTION
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR19L222IL64-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
XR19L400 制造商:EXAR 制造商全稱:EXAR 功能描述:SINGLE CHANNEL INTEGRATED UART AND RS-485 TRANSCEIVER
XR19L400_09 制造商:EXAR 制造商全稱:EXAR 功能描述:SINGLE CHANNEL INTEGRATED UART AND RS-485 TRANSCEIVER
XR19L400IL40 制造商:EXAR 制造商全稱:EXAR 功能描述:SINGLE CHANNEL INTEGRATED UART AND RS-485 TRANSCEIVER
XR19L400IL40-0B-EB 功能描述:界面開發(fā)工具 Supports L400 40 pin QFN, PCI Interface RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V
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