U4285BM-MFSG3 Atmel, U4285BM-MFSG3 Datasheet
U4285BM-MFSG3
Specifications of U4285BM-MFSG3
Related parts for U4285BM-MFSG3
U4285BM-MFSG3 Summary of contents
Page 1
... High Signal/Noise Ratio Description The U4285BM is an integrated circuit in BICMOS technology for frequency synthesiz- ers. It performs all the functions of a PLL radio tuning system and is controlled by a 2-wire bus. The device is designed for all frequency synthesizer applications in radio receivers, as well as for RDS (Radio Data System) applications. ...
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... AM analog output 16 VA Analog supply voltage 17 C Capacitor 18 OSCIN Oscillator input 19 OSCOUT Oscillator output 20 GND1 Ground 1 (digital) U4285BM 2 V GND1 SCL 2 19 OSCOUT 18 OSCIN 3 SDA SWO1 U4285BM 15 SWO2 PDAMO 6 SWO3 14 PDAM 7 SWO4 13 PDFM 8 12 FMOSC PDFMO GND2 AMOSC 4750A–AUDR–11/03 ...
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... The module address contains a programmable address bit A 1, which (along with address select input AS, pin 4), enables the operation of two U4285BM devices in one system. If bit identical with the status of the address select input AS, the chip is selected ...
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... Saturation voltage HIGH Bus SCL, SDA, AS Input voltage HIGH Input voltage LOW Output voltage acknowledge LOW Clock frequency Rise time SDA, SCL Fall time SDA, SCL Period of SCL HIGH Period of SCL LOW U4285BM 4 Symbol R thJA Test Conditions Pins 1 AM mode/FM mode 1 ...
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... Min. Typ. t 4.7 sSTA t 250 sDAT t 4.7 sSTOP t 4.7 wSTA t 4.0 hSTA t 0 hDAT T = 85° 5.5 V 5.0 V 4.5 V 60.0 100.0 f (MHz) iFM T = -30° 5.5 V 5.0 V 4.5 V 60.0 100.0 f (MHz) iFM U4285BM Max. Unit µs µs µs µs µs µs 5 ...
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... U4285BM 6 Figure 5. AM Input Sensitivity 100 85°C 10.0 1.0 0 Figure 6. AM Input Sensitivity -30 C 100 -30°C 10.0 1.0 0 Figure 7. Bus Timing SDA wSTA SCL hDAT hSTA Stop Start 5.5 V 5 100 V ( 5.5 V 5 hSTA sSTA hDAT 100 t sSTOP P 4750A–AUDR–11/03 ...
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... X X SWO1 SWO2 SWO3 operation PD analog Negative polarity Output current 2 Subaddress A Data 0 R-divider Subaddress A Data 3 N-divider SWO4 AM/ ANA R-divider R-divider N-divider N-divider LOW AM operation TEST Positive polarity Output current 1 A Data 1 A Data 2 A Data 4 A U4285BM LSB 0 POL PD - CUR HIGH ...
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... Figure 8. Application Circuit 110 100 nF 100 Recommendations for Applications U4285BM 8 100 F 110 MHz U4289BM 12k 12k *) Values depend on the step frequency and used varicaps • 100 nF should be very close to pin • GND 2 (pin 10 - analog ground) and GND 1 (pin - digital ground) must be connected according to Figure 8 • ...
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... Ordering Information Extended Type Number U4285BM-MFS U4285BM-MFSG3 Package Information Package SSO20 Dimensions in mm 0.25 0. 4750A–AUDR–11/03 Package Remarks SSO20 plastic – SSO20 plastic Taping according to IEC-286-3 6.75 6.50 1.30 0.15 0.05 5.85 11 technical drawings according to DIN specifications 10 U4285BM 5.7 5.3 4 ...
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... No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical components in life support devices or systems. ...