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| SYNCHRONOUS TIMING MODULES TMB SERIES SYNCHRONOUS TIMING MODULES 8kHz Inputs, LVPECL outputs <622.080MHz DESCRIPTION TMB (Synchronous Timing Module, model B) series parts consists of a PLL module that generates LVPECL outputs up to 622.080MHz from a lowjitter VCXO. The module is locked to one of two 8kHz reference inputs, selectable by the A/B SEL pad. PECL and complimentary PECL outputs can be disabled by pad 1, the control pad. Pad 12 gives an alarm signal when `Loss Of Lock' or `Loss Of Reference' occurs. The module will enter into Free Run mode, signaled from pad 9 FR status, when both REF A and REF B are absent. Applications include Line Cards and Service Termination Cards for SONET, SDH, ATM and PDH network equipment. Page 1 of 2 OUTLINES & DIMENSIONS FEATURES Loss of Reference (LOR) and Loss of Lock (LOL) active alarms. Two 8kHz reference inputs, CMOS levels. Custom input frequencies upon request. Continuous input monitoring of the two external frequencies. Automatic FREE RUN mode on Loss of Reference (both A&B) <622.080MHz LVPECL outputs with enable/disable functions Free-run clock output +3.3V SMD package, current 150mA. GENERAL SPECIFICATION Input Reference Frequency: Output Frequency: Supply Voltage: Current Consumption: 8kHz (A & B)* <622.080MHz +3.3 Volts 5% 120mA minimum 150mA typical 200mA maximum 1 second 40ppm CMOS 2.2V mon., 2.3V typ., 2.5V max. 1.4V min., 1.5V typ., 1.6V max. 10pF 40%60% at 50% level 220ps 20ppm maximum 1ps RMS, 12kHz to 20MHz bandwidth 7microseconds 10Hz max. 3dB loop response 0~+70C (Code `C') -40~+85C (Code `I') FUNCTIONAL BLOCK DIAGRAM Acquisition Time: Capture/Pull-in Range: Input Logic: Output Logic Levels HIGH: LOW: Output Capacitance: Duty Cycle: Rise and Fall Times: Free Run Accuracy: Output Jitter: Input Jitter Tolerance: Jitter Filter Band Width: Operating Temperature Range COMMERCIAL: INDUSTRIAL: * Custom inputs available. 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 +100C 240C PART NUMBERS Part numbers are generated according to this scheme: Supply Voltage "3" for +3.3 V Package Type TMB25 Operating Temperature Range "C"=0~+70C "I"=-40~+85C Input Frequency Add "k" for kHz Output Frequency Output Frequency in MHz EXAMPLE: 3TMB25-C-8K-622.080 Representing: +3.3V supply, model TMB (25mm square, 18 pad SMD package), Commercial operating temperature range, 8kHz input frequency and output frequency is 622.080MHz 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 Inputs, LVPECL outputs <622.080MHz INPUT SELECTION AND OUTPUT RESPONSE AUTO 0 0 0 0 0 0 0 0 0 0 1 1 1 1 RESET 1 X 0 0 0 0 0 0 0 0 0 0 0 0 ENABLE 0 1 0 0 0 0 0 0 0 0 0 0 0 0 A/B SELECT X X X 0 1 0 1 1 0 X X X X X REF A X X X A A NA NA A A NA A A NA NA REF B X X X A A A A NA NA NA A NA A NA FR X X 1 0 0 0 0 0 0 0 0 0 0 0 FR STATUS 1 X 1 0 0 0 0 0 0 1 0 0 0 1 ALARM X X X 0 0 1 0 1 0 1 0 0 0 1 Q X 0 X X X X X X X X X X X X Q X 1 X X X X X X X X X X X X FR RA RB NL RB NL RA FR RA* RA* RB** FR NOTE FR Page 2 of 2 KEY A: ACTIVE NA: NOT ACTIVE FR: FREE RUN MODE NL: NOT LOCKED RA: LOCKED TO A X: DON'T CARE RB: LOCKED TO B * If AUTO is on (1) the system will lock to REF A ** If REF A is lost the system will lock to REF B automatically; if both References are lost the unit go into FREE RUN. PAD CONNECTION DESCRIPTION Pad No. Pad Name 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 ENABLE NC NC REF A A/B SEL RESET REF B GRN FR STATUS Vcc AUTO ALARM FR NC NC Q GRN Q Description of Function VCXO Enable (0=Enable, 1= Disable) Not connected Not connected Reference Input A Reference Select (0=Input A, 1=Input B) Reset (Reset = 1) Reference Inpt B Ground Free Run Status (Unit on Free Run = 1) Supply Voltage (+3.3VDC) Automatic Function Loss of Reference (Alarm = 1) Force Free Run (Free Run = 1) Not connected Not connected LVPECL Complimentary Output Ground LVPECL Output 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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