
FTS125-CTV Data Sheet #:
SG185
Page 4
Rev:
02
Date:
01/03/12
Copyright 2012 The Connor-Winfield Corp. All Rights Reserved
Specifications subject to change without notice
Pin Description
Table 1
Pin #
Pin Name
Description
1
TXC
RS-232communicationtransmitsignalforUART2(Optional)
2
TXB
RS-232communicationtransmitsignalforUART1(Optional)
3
TXA
RS-232communicationtransmitsignalforUART0(Optional)
4
GND
5
RXC
RS-232communicationreceivesignalforUART2(Optional)
6
RXB
RS-232communicationreceivesignalforUART1(Optional)
7
RXA
RS-232communicationreceivesignalforUART0(Optional)
8
*Bootsel
NormallyHIGH-OnlypulledlowforRS-232re-programmingofGPSsoftware.
Defaultstateispulledhighinternally.
9
10MHzRefInput
ExternalLVCMOS10MHzreference(Optional).Defaultstateispulledhighinternally.
10
*Reset
HardwareResetfortheGPStimingcircuitry.Pulllowtoreset.Defaultstateispulled
highinternally.
11
GND
12
1PPSRefInput
ExternalLVCMOS1PPSreference(Optional).Defaultstateispulledhighinternally.
13
GND
14
AntennaSupplyVoltage
AntennaSupplyVoltage.Limitcontinuouscurrentto45mAMax.
15
GND
16
VCC1
SupplyvoltageforGPStimingcircuitry.
17
VCC2
Supplyvoltagefornoiseclean-upandinterfacingcircuitry.
18
GND
19
SYNC1Control
Lockmodecontrolsignal1.SeeTable4forfunctionaldescription.
Defaultstateispulledhighinternally.
20
SYNC2Control
Lockmodecontrolsignal2.SeeTable4forfunctionaldescription.
Defaultstateispulledhighinternally.
21
*Disable
Open/High=enabledoutputs.Pulllowtodisablethe10MHzCMOSandSINEoutputs.
Defaultstateispulledhighinternally.
22
Unused
23
HoldoverStatus
High=UnitisinHoldover
24
LockStatus
High=Unitislockedtoselectedreference.
25
AntennaFaultStatus
High=AfaulthasbeendetectedonPin14(AntennaSupplyVoltage)
26
1PPSCMOSOutput
1PPSCMOSoutputprovidedbytheWi125
27
GND
28
10MHzCMOSOutput
10MHzlowjitterCMOSoutput
29
Unused
30
Unused
31
GND
32
10MHzSINEOutput
10MHzACcoupledlowjitterSINEoutput