ba8270f/ba8270fv audio ics 1/5 bus interface for car audio ba8270f/ba8270fv the ba8270f/ba8270fv is bus interface ic (master side) developed for car audio applications. when used with the ba827f/ba8272fv (slave side), it is possible to communi cation system for the deck and components such as power amplifiers, cd and md changers, tuners and tvs us ing bus on, data, clock and reset signals. z applications car audio systems z features 1) allows construction of communication system with bus on, data, clock and reset signals with used with the ba8272f/ 8272fv (slave side). 2) ideal for car audio systems. z absolute maximum ratings (ta=25 c) parameter symbol limits unit pd topr tstg 7.0 450 400 ? 40 to + 85 ? 55 to + 125 ? 0.3 to + 18.0 ? 0.3 to + 7.0 v mw v v ba8270f ba8270fv c c v batt v in v cc ? 1 ? 2 operating temperautre range is for i l 1=50ma, and i l 2=5ma. ? 1 reduced by 4.5mw for each increase in ta of 1 c over 25 c. ? 2 reduced by 4.0mw for each increase in ta of 1 c over 25 c. power supply voltege power dissipation operating temperature storage temperature voltage range for batt voltage range for input z recommendable operating voltage range (ta=25 c) parameter symbol unit max. typ. min. 4.0 7.0 v v cc ? power supply voltage
ba8270f/ba8270fv audio ics 2/5 z electrical characteristic curves 14 v cc r9 100k 12 11 9 8 10 13 7 2 3 5 6 4 1 bus on out clk out data in / out vref batt reset out gnd reset out batt check data out r35 100k r20 100k r15 100k r34 47k r32 56k r10 4.7k 22k r22 1k 3.9k 10k r20 22k r14 1k 47k r10 3k data in clk in bus on in z electrical characteristics (unless otherwise noted, ta=25 c, v cc =5.5v) parameter symbol min. typ. max. unit conditions i cc1 i cc2 i cc3 v loss1 v loss2 i in1 i in2 i in3 i in4 r 14 r 22 r 29 i data v sat v 6on v 10on 32 175 150 38 0.75k 0.75k 75k 0.75 8.5 17 0.25 0.15 48 220 190 48 1k 1k 100k 1.1 0.2 0.1 300 15.0 30 0.35 0.2 70 300 300 70 1.25k 1.25k 125k 1.45 0.4 0.25 0.4 a a a a a ma ma v v ma v v v no load, bus on in 1 1.0v il1=50ma, il2=50ma bus on in pin, 0v input data in pin | 5.5v input batt pin | 5.5v input reset out pin | 0v input clk out data in / out batt check clk out | data out data in / out 5.5v applied to data in 0v input to bus on in circuit current 1 circuit current 2 circuit current 3 voltage 1 between vcc and bus on out voltage 2 between vcc and bus on out input pin current 1 input pin current 2 input pin current 3 input pin current 4 output internal resistor 1 output internal resistor 2 output internal resistor 3 data out pin output current on output voltage for each data in / out on output voltage battcheck output voltage ? ? ? ? ? ? ? ?? ? ? ? ? no load and batt pin (pin 3)=5.5v. other pins off (excluding the batt input current) il1=100ma il2=40ma not designed for raduation resistance.
ba8270f/ba8270fv audio ics 3/5 z measurement current bus on out clk out data in / out vref batt reset out gnd reset out batt check data out data in clk in bus on in 14 13 12 11 10 9 8 7 6 5 4 3 2 1 v a a a v a v a v v a v ba8270f / ba8270fv v cc i ln4 i ln1 2 1 2 1 2 11 2 s9 s8 s7 r29 s12 v11 v10 e11 5.5v 1 2 s6 e9 i ln2 5.5v s5 1 2 v8 i data 1 2 s1 v cc 5.5v v loss2 v loss1 s11 12 12 s10 21 s2 s3 s4 21 2 1 i l1 i l2 r14 r22 i in3 5.5v e3 v6 ? i cc ?? fig.1
ba8270f/ba8270fv audio ics 4/5 z measurement circuit switch operation table parameter symbol s 1 s 2 s 3 s 4 s 5 s 6 s 7 s 8 s 9 conditions i cc1 i cc2 i cc3 v loss1 v loss2 i in1 i in2 i in3 i in4 r 14 r 22 r 29 22 2 2 22 1 11 1 1 1 1 1 111 1 1 1 1 111 21 2 1 2 1 2 1 2 1 2 1 2 1 1 2 1 22 2 2 1 1 2 2 2 2 pin14 pin14 pin14 pin1-pin14 pin1-pin14 pin1-pin14 pin12 pin9 pin3 pin13 pin10-pin14 pin6-pin4 pin8 pin4 pin8 pin6 pin10 circuit current 1 circuit current 2 circuit current 3 voltage 1 between v cc and bus on out voltage 2 between v cc and bus on out input pin current 1 input pin current 2 input pin current 3 input pin current 4 output internal resistor 1 output internal resistor 2 output internal resistor 3 clk out pin output voltage data in / out on output voltage data in / out on output volotage batt chrck output voltage measured pin data out pin output current i data v 4on v 8on v 6on v 1on s 10 s 11 s 12 3pin=5.5v 12pin=0v i l1 =50ma, i l2 =50ma i l1 =100ma i l1 =40ma ? ? ? ? ? e 9 =5.5 e 9 =5.5 e 11 =5.5 e 9 =5.5 e 9 =5.5 e 3 =5.5 e 3 =5.5 z application example ? fig.2 1 2 3 4 5 6 7 14 13 12 11 10 9 8 f e d c b a bus on out reset out batt clk out vref data in / out gnd reset out batt check data out data in clk in bus on in cc bus on reset batt bus data gnd bus clk (power supply) to slave unit construct zener diode circuits to provide over-voltage protection for data.
ba8270f/ba8270fv audio ics 5/5 z operation notes (1) we guarantee the application circuit des ign, but recommend that you thoroughly c heck its characteristics in actual use. if you change any of the external co mponent values, check both the static and tr ansient characteristics of the circuit, and allow sufficient margin in your selection to ta ke into account variations in the components and ics. note that rohm has not fully investi gated patent tights regarding this product. (2) based on the eiaj static electric destruction voltage measurement (c=200pf and r0 ? ), the withstanding voltage of pins 9 and 11 has been determined to be 200v or less. take due care. note that rohm has not fullyinvesti gated patent rights regarding this product. z external dimensions (unit : mm) sop14 ssop-b14 ba8270f ba8270fv 0.4 0.1 1.27 1 14 8.7 0.2 7 8 4.4 0.2 6.2 0.3 0.11 1.5 0.1 0.15 0.15 0.1 0.3min. 0.1 0.22 0.1 0.65 8 7 14 1 6.4 0.3 5.0 0.2 1.15 0.1 0.15 0.1 0.3min. 0.1 + ? + ? + ? + ? + ? + ? + ? + ? + ? 4.4 0.2 + ? + ? + ?
appendix appendix1-rev1.0 the products listed in this document are designed to be used with ordinary electronic equipment or devices (such as audio visual equipment, office-automation equipment, communications devices, electrical appliances and electronic toys). should you intend to use these products with equipment or devices which require an extremely high level of reliability and the malfunction of with would directly endanger human life (such as medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other safety devices), please be sure to consult with our sales representative in advance. notes no technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of rohm co.,ltd. the contents described herein are subject to change without notice. the specifications for the product described in this document are for reference only. upon actual use, therefore, please request that specifications to be separately delivered. application circuit diagrams and circuit constants contained herein are shown as examples of standard use and operation. please pay careful attention to the peripheral conditions when designing circuits and deciding upon circuit constants in the set. any data, including, but not limited to application circuit diagrams information, described herein are intended only as illustrations of such devices and not as the specifications for such devices. rohm co.,ltd. disclaims any warranty that any use of such devices shall be free from infringement of any third party's intellectual property rights or other proprietary rights, and further, assumes no liability of whatsoever nature in the event of any such infringement, or arising from or connected with or related to the use of such devices. upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or otherwise dispose of the same, no express or implied right or license to practice or commercially exploit any intellectual property rights or other proprietary rights owned or controlled by rohm co., ltd. is granted to any such buyer. products listed in this document use silicon as a basic material. products listed in this document are no antiradiation design. about export control order in japan products described herein are the objects of controlled goods in annex 1 (item 16) of export trade control order in japan. in case of export from japan, please confirm if it applies to "objective" criteria or an "informed" (by miti clause) on the basis of "catch all controls for non-proliferation of weapons of mass destruction.
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