TMA EUROQUARTZ | Alldatasheet
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EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE SYNCHRONOUS TIMING MODULES Input Reference Frequency: 8, 16, 32 or 64kHz or <77.76MHz Selectable by SELA & SELB pads Output Frequency: from 1.544MHz to 77.760MHz Supply Voltage: +3.3 Volts ±5% Current Consumption: Less than 80mA Input Jitter Tolerance: 2us at 10Hz Acquisition Time: 1 second Capture/Pull-in Range: ±40ppm Input Logic: CMOS Output Logic: CMOS Duty Cycle: 40%60% at 50% level Rise and Fall Times: 2ns (20%~80% output levels) Free Run Accuracy: ±15ppm maximum Jitter at 77.760MHz: 7.5ps RMS typ. at 10Hz~1MHz 12kHz to 20MHz bandwidth Operating Temperature Range COMMERCIAL: 0°~+70°C (Code ‘C’) INDUSTRIAL: -40°~+85°C (Code ‘I’) Loss of Reference (LOR) and Loss of Lock (LOL) active alarms. Continuous input reference monitoring of external references. Automatic FREE RUN mode on Loss Of Reference (LOR) ±15ppm output accuracy guaranteed. Manually forced FREE-RUN mode by software control. Tristate (output high impedance) for external testing. +3.3V leadframe package, current <80mA. 1 second acquisition time TMA SERIES SYNCHRONOUS TIMING MODULES
FEATURES
OUTLINES & DIMENSIONS PART NUMBERS
DESCRIPTION
TMA (Synchronous Timing Module, model A) parts serve as a frequency translator in telecommunications systems. The device translates any CMOS input reference frequencies (8, 16, 32, 64kHz up to 77.760MHz) into jitter-attenuated, phase locked reference synchronized output frequencies up to 77.760MHz. FUNCTIONAL BLOCK DIAGRAM 8kHz to 77.760MHz Inputs, up to 77.760MHz CMOS output Page 1 of 2 Supply Voltage Package Type Operating Temperature Range Input Frequency Output Frequency “3” for +3.3 V TMA20 “C”=0°~+70°C “I”=-40°~+85°C Add “k” for kHz Output Frequency in MHz Part numbers are generated according to this scheme: EXAMPLE: 3TMA20-C-8K-77.760 Representing: +3.3V supply, TMA package, Commercial operating temperature range, 8kHz input frequency and output frequency of 77.760MHz. ABSOLUTE MAXIMUM RATINGS Vcc Supply Voltage relative to ground -0.5V to 4.0V Vin Input Voltage relative to ground -0.5V to 5.5V Tstg Storage Temperature (Ambient) -65° to +150°C Tref Maximum reflow Temperature 240°C Symbol Description Rating PAD CONNECTIONS
1 REF OP Reference Output
2 NC Do not connect - factory use only
3 NC Do not connect - factory use only
4 GND Ground
5 FREE RUN Control input to force FREE RUN
6 LOR Logic 1 indicates Loss Of Reference
7 LOL Logic 1 indicates Loss Of Lock
8 REFIN Reference input
9 OUTPUT VCXO output
10 E/D Enable/Disable output
11 VCC Supply Votage
12 TDO Do not connect - factory use only
13 SEL A Second bit reference frequency selection
14 SEL B First bit reference frequency selection
Pad No. Pad Name Description of Function
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE SYNCHRONOUS TIMING MODULES TMB SERIES SYNCHRONOUS TIMING MODULES Page 2 of 2 LOGIC CONTROLS OUTPUT PROGRAMMING 0 0 Locked to reference
1 X High impedance Tristate
0 1 Free run at nominal frequency TriState Free Run Output REFERENCE SELECTION 0 0 8 kHz 0 1 16 kHz 1 0 32 kHz 1 1 64 kHz SEL A SEL B Reference Selected ALARM STATE 0 0 No Alarm 1 0 Loss of Lock (LOL) 1 1 Loss of Reference (LOR) LOL LOR Alarm Contact Euroquartz for custom value reference inputs 8kHz to 77.760MHz Inputs, up to 77.760MHz CMOS output