SN260Q STMicroelectronics, SN260Q Datasheet - Page 19

• Manufacturer Part Number: SN260Q
• Description: IC ZIGBEE/802.15.4 PROC 40-QFN
• Manufacturer: STMicroelectronics

Specifications of SN260Q

• Frequency: 2.4GHz
• Modulation Or Protocol: 802.15.4
• Applications: ZigBee™
• Power - Output: -32dBm ~ 5dBm
• Sensitivity: -97.5dBm
• Voltage - Supply: 2.1 V ~ 3.6 V
• Current - Receiving: 35.5mA
• Current - Transmitting: 35.5mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-QFN
• For Use With: 497-6404 - BOARD EVAL SPZB260 MOD FOR STR9497-5990 - KIT EVAL REVA FOR ZIGBEE497-5879 - NETWORK DEVELOPMENT FOR SN260497-5877 - KIT RADIO CARRIER FOR SN260
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Data Rate - Maximum: -

SN260
6.10
6.11
6.11.1
Power-on-reset (POR)
Each voltage domain (1.8V digital core supply VDD_CORE and pads supply VDD_PADS)
has a power-on-reset (POR) cell.
The VDD_PADS POR cell holds the always-powered high-voltage domain in reset until the
following conditions have been met:
●
●
●
Additionally, the digital domain counts 1,024 clock edges on the 24MHz crystal before
releasing the reset to the main digital core.
Table 4
Table 4.
Clock sources
The SN260 integrates two oscillators: a high-frequency 24-MHz crystal oscillator and a low-
frequency internal 10-kHz RC oscillator.
High-frequency crystal oscillator
The integrated high-frequency crystal oscillator requires an external 24MHz crystal with an
accuracy of ±40ppm. Based upon the application bill of materials and current consumption
requirements, the external crystal can cover a range of ESR requirements. For a lower ESR,
the cost of the crystal increases but the overall current consumption decreases. Likewise, for
higher ESR, the cost decreases but the current consumption increases. Therefore, the
designer can choose a crystal to fit the needs of the application.
Table 5
Table 5.
VDD_PADS POR release
VDD_PADS POR assert
1.8V POR release
1.8V POR hysteresis
Frequency
Duty cycle
Phase noise from 1 kHz to
100 kHz
Accuracy
The high-voltage pads supply VDD_PADS voltage rises above a threshold.
The internal RC clock starts and generates three clock pulses.
The 1.8V POR cell holds the main digital core in reset until the regulator output voltage
rises above a threshold.
Parameter
lists the features of the SN260 POR circuitry.
lists the specifications for the high-frequency crystal.
POR specifications
High-frequency crystal specifications
Parameter
Initial, temperature, and aging
Test conditions
Min.
1.00
0.50
1.35
0.08
Min.
- 40
40
Typ.
1.20
0.60
1.50
0.10
Functional description
Typ.
24
Max.
1.40
0.70
1.65
0.12
- 120
Max.
+ 40
60
dBc/Hz
Unit
MHz
ppm
Unit
%
V
V
V
V
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