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Micrel
Pin Configuration
MICRF219
RO1
GNDRF
ANT
GNDRF
Vdd
SQ
SEL0
SHDN
1
2
3
4
5
6
7
8
16 RO2
15 SCLK
14 RSSI
13 CAGC
12 CTH
11 SEL1
10 DO
9 GND
MICRF219AYQS
Pin Descript ion
16-Pin
Q SOP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pi n N ame
RO 1
GNDRF
ANT
G ND RF
V D D
SQ
S E L0
S HD N
G N D
DO
SEL1
CTH
CAGC
RSSI
SCLK
RO2
Pin Function
Reference Oscillator Inp ut: Reference resonator input connection to pierce oscillator stage. May also
be driven by external reference signal of 200mVp-p to 1.5V p-p amplitude m aximum. Internal
capacitanc e of 7pF to GND during normal operation.
Negative supply connection associated with ANT RF input.
Antenna Input: RF signal input from antenna. Internally AC coupled. It is recommended a matching
network with an inductor-to-RF ground be used to improve ESD protecti on.
Ground connection for ANT RF input.
Positive supply connection for all chip functions. Bypass with 0.1μF capacitor located as c lose to the
VDD pin as possible.
Squelch Control Logic-Level Input. An internal pul l-up pulls the logic-input HIGH when the device is
enabled. Bit D17 sets whether squelch is enabled or disabled when a logic-le vel signal is applied the
SQ pin. See Squelch Enable Truth-Table on page
Demodulator Filter Bandwidth Select Logic-Level Input. Internal pull-up (3u A typical) when not in
shutdown or SLEEP mode. Used in conjunction with SEL1 to control D3 ban dwidth LSB when serial
interface contains default setting. It does not need to be def ined in SLEEP mode.
Shutdown control Logic-Level Input. A logic-level LOW enables the device. A logic-level HIGH places
the device in low-power shutdown mode. An internal pull-up pulls the logic input HIGH.
Negative supply connection for all chip functions except for RF input.
Data Input and Output. Demodulated data output. May be blanked until bit checking test is accepta ble.
A current limited CMOS output during normal operation this pin is also u sed as a CMOS Schmitt input
for serial interface data. A 25k ? pull-down is present when device is in sh utdown and sleep modes.
Demodulator Filter Bandwidth Select Logic-Level Input: Internal (3uA ty pical) pull-up when not in
shutdown or SLEEP mode. Used in conjunction with SEL0, to control D4 bandwidth MSB, when serial
interface contains default setting. It does not need to be defined in SL EEP mo de.
Demodulation threshold voltage integration capacitor. Capacitor-to-GND sets the settling time for the
demodulation data slicing level. Values above 1nF are recommended and should be optimized for data
rate and data profile.
AGC filter capacitor. A capacitor, normally greater than 0.47 μ F, is connected from this pin-to-GND
Received signal strength indication (output): Output is from a switched capacitor integrating op amp
with 220 ? typical output impedance.
Serial interface input clock. CMOS Schmitt input. A 25k ? pull-down is present when device is in
shutdown mode.
Reference resonator connection. Internal capacitance of 7pF to GND during normal operation.
June 2011
2
M9999-060811
(408) 944-0800
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MICRF220-315-EV 功能描述:EVAL BOARD FOR MICRF220 制造商:microchip technology 系列:- 零件状态:有效 类型:接收器 频率:315MHz 配套使用产品/相关产品:MICRF220 所含物品:板 标准包装:1
MICRF220-433-EV 功能描述:EVAL BOARD FOR MICRF220 制造商:microchip technology 系列:- 零件状态:有效 类型:接收器 频率:433.92MHz 配套使用产品/相关产品:MICRF220 所含物品:板 标准包装:1
MICRF220AYQS 功能描述:射频接收器 300MHz to 450MHz, 3.0V to 3.6V, 6mA, <10kbps ASK Receiver with RSSI and Shutdown RoHS:否 制造商:Skyworks Solutions, Inc. 类型:GPS Receiver 封装 / 箱体:QFN-24 工作频率:4.092 MHz 工作电源电压:3.3 V 封装:Reel
MICRF220AYQS TR 功能描述:射频接收器 300MHz to 450MHz, 3.0V to 3.6V, 6mA, <10kbps ASK Receiver with RSSI and Shutdown RoHS:否 制造商:Skyworks Solutions, Inc. 类型:GPS Receiver 封装 / 箱体:QFN-24 工作频率:4.092 MHz 工作电源电压:3.3 V 封装:Reel
MICRF221 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:3.3V, QwikRadio 850 MHz to 950 MHz Receiver
MICRF221AYQS 功能描述:射频接收器 850MHz to 950MHz, 3.0V to 3.6V, 9mA, 10kbps ASK Recdeiver with Auto-Poll and RSSI, Shutdown in 16-lead QSOP RoHS:否 制造商:Skyworks Solutions, Inc. 类型:GPS Receiver 封装 / 箱体:QFN-24 工作频率:4.092 MHz 工作电源电压:3.3 V 封装:Reel
MICRF221AYQS TR 功能描述:射频接收器 850MHz to 950MHz, 3.0V to 3.6V, 9mA, 10kbps ASK Recdeiver with Auto-Poll and RSSI, Shutdown in 16-lead QSOP RoHS:否 制造商:Skyworks Solutions, Inc. 类型:GPS Receiver 封装 / 箱体:QFN-24 工作频率:4.092 MHz 工作电源电压:3.3 V 封装:Reel