MICRF620 Micrel Inc, MICRF620 Datasheet - Page 18

• Manufacturer Part Number: MICRF620
• Manufacturer: Micrel Inc

Specifications of MICRF620

• Operating Temperature (min): -20C
• Operating Temperature Classification: Commercial
• Modulation Type: FSK
• Lead Free Status / Rohs Status: Not Compliant

If FEE = -128 and still counting dwn-pulses:
To avoid this situation, always make sure max count is
between limits.
Application Circuit Illustration
Figure 12 shows a typical set-up with the MICRF620, a
Low-Drop-Out voltage regulator (LDO)
controller (MCU). When the MICRF620 and the MCU runs
on the same power supply (min 2.0, max. 2.5V), the IO
can be connected directly to the MCU. If the MCU needs a
higher VDD than the max. specified VDD of the MICRF620
(2.5V), voltage dividers need to be added on the IO lines
not to override the max. input voltage.
Figure 11 shows a recommended voltage divider circuit for
a MCU running at 3.0V and the MICRF620 at 2.5V.
Micrel, Inc.
July 2006
Figure 11. Circuit illustration of MICRF620, LDO and MCU
1) =>-129 = +127
2) 126
3) 125
and a mikro-
18
MICRF6xx
Figure 12. How to connect MICRF620 (2.5V) and MCU (3.0V)
DATACLK
DATAIXO
RSSI
SCLK
LD
CS
IO
18k
18k
18k
3k3
3k3
3k3
15k
MICRF620/MICRF620Z
MCU
CS
SCLK
IO
DATAIXO
DATACLK
LD
RSSI
M9999-120205