Globalstar STX3 User Manual

8545-0198-01 Revision 1.9 STX3 Users Manual
9/24/2020 Globalstar, Inc. Confidential and Proprietary Page | 7
PIN
NAME
TYPE
Description
1
CTS
Output
5V tolerant, weak internal pull-up, may be pulled up to 5V max external
2
RTS
Input
5V tolerant, weak internal pull-up
3
RESERVED
No Connect
Do NOT connect
4
NC
No Connect
5
NC
No Connect
6
RESERVED
No Connect
Do NOT connect
7
VRF
Power In
3.0 to 3.6 Volts, 350 mA max load @ 3.3V, ripple 50 mV (pk-pk) max
8
GND
Ground
9
GND
Ground
10
GND
Ground
11
GND
Ground
12
GND
Ground
13
GND
Ground
14
RFOUT
Output
50 ohm single ended antenna connection, use impedance matched trace
15
GND
Ground
16
GND
Ground
17
GND
Ground
18
GND
Ground
19
GND
Ground
20
GND
Ground
21
RESERVED
No Connect
22
RESERVED
No Connect
23
RESERVED
No Connect
24
PWR_EN
Output
Open collector output to control VRF supply. VRF must be stable within 25ms after assertion.
25
NC
No Connect
26
TxD
Output
5V tolerant, weak internal pull-up, may be pulled up to 5V max external
27
RxD
Input
5V tolerant, weak internal pull-up
28
Test2
Input
internal pull-up, only drive with open collector or ground,
no external voltage to be applied
29
Test1
Input
internal pull-up, only drive with open collector or ground,
no external voltage to be applied
30
RESERVED
No Connect
Do NOT connect
31
RESET
Input
Only drive with open collector, no external voltage to be applied
32
VDIG
Power In
3.0 to 5.0 Volts, 50 mA max load @ 3.3V, ripple 50 mV (pk-pk) max

Globalstar STX3 Specifications

General

Brand	Globalstar
Model	STX3
Category	Control Unit
Language	English