U4285BM-AFS TEMIC Semiconductors, U4285BM-AFS Datasheet
U4285BM-AFS
Related parts for U4285BM-AFS
U4285BM-AFS Summary of contents
Page 1
... PLL radio tuning system and is controlled Features D Reference oscillator MHz D Two programmable 16 bit dividers adjustable from 2 to 65535 D y Fine tuning steps kHz FM 2 kHz Ordering Information Extended Type Number U4285BM-AFS U4285BM-AFSG3 Block Diagram 18 OSCIN Oscillator OSCOUT 19 2 SCL bus 3 SDA interface ...
Page 2
... The module address contains a programmable address bit A 1 which with address select input AS (Pin 4) makes it possible to operate two U4285BM in one system. If bit identical with the status of the address select input AS, the chip is selected . The subaddress determines which one of the data bytes is transmitted first ...
Page 3
... SWO2 SWO3 SWO4 R-divider 7 2 R-divider 15 N-divider 7 2 N-divider LOW FM-operation PD analog Negative polarity Output current 2 Figure 2. U4285BM LSB LSB AM ANA POL CUR ...
Page 4
... U4285BM Transmission Protocol MSB LSB S Address A Subaddress A7 A0 R-divider MSB LSB S Address A Subaddress A7 A0 N–divider S = Start P = Stop A = Acknowledge Absolute Maximum Ratings Parameters Supply voltage Pin 1 Input voltage Pins 11, 18 and 19 Output current Pins and 8 Output drain voltage ...
Page 5
... Pins 12 and 15 V satL V 9.5 satH Pins 2, 3 and 4 V iBUS 3.0 0 Pin Pin 2 f SCL Pins 2 and Pins 2 and Pin 4.7 L U4285BM Typ. Max. Unit 5.0 5.5 V 4.0 7.0 mA 4.0 7.0 mV rms mV rms mV rms mV rms 100 400 mV 100 nA m 2000 2400 A m 500 ...
Page 6
... U4285BM Parameters Test conditions / Pin Setup time Start condition Data Stop condition 1) Time space Hold time Start condition DATA 1) This is a space of time where the bus must be free from data transmission and before a new transmission can be started Bus Timing SDA t t wSTA ...
Page 7
... V 1 100.0 0.1 13356 Figure 6. AM input sensitivity 100 6 U4285BM Values depend on the step 12 k frequency and used varicaps Figure 7. U4285BM 1.0 10.0 100 MHz ) iAM 100 FMOSC AMOSC * 2 ...
Page 8
... U4285BM Recommendations for Applications 100 nF should be very close to Pin Pin 20 (GND 1) D GND 2 (Pin 10 – analogue ground) and GND 1 (Pin 20 – digital ground) must be connected according to figure 8 PCB-Layout GND (10 and 4 MHz crystal must be very close to Pin 18 and Pin 19 ...
Page 9
... Package Information Package SSO20 Dimensions in mm 6.75 6.50 0.25 0.65 5. TELEFUNKEN Semiconductors Rev. A3, 14-May-97 5.7 5.3 4.5 4.3 1.30 0.15 0.05 6.6 6.3 11 technical drawings according to DIN specifications 10 U4285BM 0.15 13007 9 (10) ...
Page 10
... U4285BM Ozone Depleting Substances Policy Statement It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to 1. Meet all present and future national and international statutory requirements. 2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment ...