1.2 Absolute Maximum Ratings................................................................................................................................... 5
5.2 Modulation, Frequency, Deviation and Symbol Rate .......................................................................................... 12
5.3 Embedded EEPROM and RFPDK ...................................................................................................................... 13
5.4 Power Amplifier ................................................................................................................................................... 15
5.5 PA Ramping ........................................................................................................................................................ 15
5.6 Working States .................................................................................................................................................... 16
5.7 The Encoder........................................................................................................................................................ 17
5.8 ID Study .............................................................................................................................................................. 20
5.12 Crystal Oscillator and RCLK................................................................................................................................ 24
6. Ordering Information ................................................................................................................................................. 26
8. Top Marking ............................................................................................................................................................... 28
8.1 CMT2157A Top Marking ..................................................................................................................................... 28
9. Other Documentations .............................................................................................................................................. 29
11. Contact Information .................................................................................................................................................. 31
Rev 0.8 | Page 4/31
www.hoperf.com
CMT2157A
1.
Electrical Characteristics
V
DD
= 3.3 V, T
OP
= 25
℃
, F
RF
= 433.92 MHz, output power is +10 dBm terminated in a matched 50 Ω impedance, unless
otherwise noted.
1.1 Recommended Operating Conditions
Table 2. Recommended Operation Conditions
Parameter
Operation Voltage Supply
Operation Temperature
Supply Voltage Slew Rate
Symbol
V
DD
T
OP
Conditions
Min
1.8
-40
1
Typ
Max
3.6
85
Unit
V
℃
mV/us
1.2 Absolute Maximum Ratings
Table 3. Absolute Maximum Ratings
Parameter
Supply Voltage
Interface Voltage
Junction Temperature
Storage Temperature
Soldering Temperature
ESD Rating
Latch-up Current
Note:
[1]. Stresses above those listed as “absolute maximum ratings” may cause permanent damage to the device. This is a stress
rating only and functional operation of the device under these conditions is not implied. Exposure to maximum rating
conditions for extended periods may affect device reliability.
Symbol
V
DD
V
IN
T
J
T
STG
T
SDR
Lasts at least 30 seconds
Human Body Model (HBM)
@ 85
℃
-2
-100
Conditions
[1]
Min
-0.3
-0.3
-40
-50
Max
3.6
V
DD
+ 0.3
125
150
255
2
100
Unit
V
V
℃
℃
℃
kV
mA
Caution!
ESD sensitive device. Precaution should be used when handling the device in order