FS7145-01-XTD ON Semiconductor

FS7140, FS7145 Programmable Phase- Locked Loop Clock Generator Description FS7140, FS7145 Figure 1. Device Block Diagram Table 1. PIN DESCRIPTIONS* Pin Type Name Description 1 DI SCL Serial interface clock (requires an external pullup) 2 DIO SDA Serial interface data input/output (requires an external pull up) 3 DI ADDR0 Address select bit 0 D 4 P VSS Ground 5 AI XIN Crystal oscillator feedback 6 AO XOUT Crystal oscillator drive 7 DI ADDR1 Address select bit 1 D 8 P VDD Power supply (+3.3 V nominal) 9 AI IPRG PECL current drive programming 10 n/c No connection 11 P VSS Ground U 12 DI REF Reference frequency input 13 n/c FS7140 = No connection U DI SYNC FS7145 = Synchronization input 14 P VDD Power supply (+3.3 V nominal) 15 DO CLKP Clock output 16 DO CLKN Inverted clock output U *Key: AI: Analog Input; AO = Analog Output; DI = Digital Input; DI = Input with Internal Pullup; DI = Input with Internal Pulldown; DIO = Digital D Input/Output; DI 3 = ThreeLevel Digital Input; DO = Digital Output; P = Power/Ground; # = Active Low Pin