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| SYNCHRONOUS TIMING MODULES TMA SERIES SYNCHRONOUS TIMING MODULES 8kHz to 77.760MHz Inputs, up to 77.760MHz CMOS output 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. Page 1 of 2 OUTLINES & DIMENSIONS FEATURES 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 GENERAL SPECIFICATION Input Reference Frequency: Output Frequency: Supply Voltage: Current Consumption: Input Jitter Tolerance: Acquisition Time: Capture/Pull-in Range: Input Logic: Output Logic: Duty Cycle: Rise and Fall Times: Free Run Accuracy: Jitter at 77.760MHz: Operating Temperature Range COMMERCIAL: INDUSTRIAL: 8, 16, 32 or 64kHz or <77.76MHz Selectable by SELA & SELB pads from 1.544MHz to 77.760MHz +3.3 Volts 5% Less than 80mA 2us at 10Hz 1 second 40ppm CMOS CMOS 40%60% at 50% level 2ns (20%~80% output levels) 15ppm maximum 7.5ps RMS typ. at 10Hz~1MHz 12kHz to 20MHz bandwidth 0~+70C (Code `C') -40~+85C (Code `I') PAD CONNECTIONS Pad No. Pad Name 1 2 3 4 5 6 7 8 9 10 11 12 13 14 REF OP NC NC GND FREE RUN LOR LOL REFIN OUTPUT E/D VCC TDO SEL A SEL B Description of Function Reference Output Do not connect - factory use only Do not connect - factory use only Ground Control input to force FREE RUN Logic 1 indicates Loss Of Reference Logic 1 indicates Loss Of Lock Reference input VCXO output Enable/Disable output Supply Votage Do not connect - factory use only Second bit reference frequency selection First bit reference frequency selection ABSOLUTE MAXIMUM RATINGS Symbol Vcc Vin Tstg Tref Description Supply Voltage relative to ground Input Voltage relative to ground Storage Temperature (Ambient) Maximum reflow Temperature Rating -0.5V to 4.0V -0.5V to 5.5V -65 to +150C 240C FUNCTIONAL BLOCK DIAGRAM PART NUMBERS Part numbers are generated according to this scheme: Supply Voltage "3" for +3.3 V Package Type TMA20 Operating Temperature Range "C"=0~+70C "I"=-40~+85C Input Frequency Add "k" for kHz Output Frequency Output Frequency in MHz 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. EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE Tel: +44 1460 230000 Fax: +44 1460 230001 email: info@euroquartz.co.uk web: www.euroquartz.co.uk SYNCHRONOUS TIMING MODULES TMB SERIES SYNCHRONOUS TIMING MODULES 8kHz to 77.760MHz Inputs, up to 77.760MHz CMOS output Page 2 of 2 LOGIC CONTROLS OUTPUT PROGRAMMING TriState 0 1 0 Free Run 0 X 1 Output Locked to reference High impedance Tristate Free run at nominal frequency REFERENCE SELECTION SEL A 0 0 1 1 SEL B 0 1 0 1 Reference Selected 8 kHz 16 kHz 32 kHz 64 kHz Contact Euroquartz for custom value reference inputs ALARM STATE LOL 0 1 1 LOR 0 0 1 Alarm No Alarm Loss of Lock (LOL) Loss of Reference (LOR) EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE Tel: +44 1460 230000 Fax: +44 1460 230001 email: info@euroquartz.co.uk web: www.euroquartz.co.uk |
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