zilog w orldwide h eadquarters ? 910 e. h amilton a venue ? c ampbell , ca 95008 t elephone : 408.558.8500 ? f ax : 408.558.8300 ? i nternet : http :// www . zilog . com 1 p roduct b lock d iagram f eatures highly-integrated mixed-signal solution user-contguarable timer otp-programmable improved accuracy industry-standard 8-pin package g eneral d escription the zsbi050 is a programmable replacement for the widely-available 555 timer and the discrete components normally required for its operation. the zsbi050 timer is designed for applications which would otherwise use the industry-standard 555 timer, but could take advantage of its ability to be programmed in-circuit. the timer features on- chip programmable memory to store timing param- eters, and replaces the external trimming resistor that requires manual tuning on traditional timers. the zsbi050 may be programmed by a micropro- cessor or by automated test equipment. zilog?s zsbi050 is the trst programmable timer device to feature built-in calibration, enabling products to include automated test and calibration. through a bidirectional serial port, the customer can set the zsbi050 to operate as a variable-duty- cycle oscillator or a monostable multivibrator with specited delays. the delay intervals can range from milliseconds to over 44 days, giving oem engineers maximum ?exibility. the zsbi050 is available in 8-pin dip or soic packages, ideal for applications with minimum board space requirements. i mprovement on the 555 t imer the zsbi050 delivers ?exibility, high reliability, and reduced manufacturing time, and it offers pre- cise timing of the delay cycle or frequencies stored in memory. the new in-circuit programming elimi- nates the need for manual calibration. additionally, the potentiometer and timing capaci- tor are eliminated, due to the user?s ability to pro- gram automatically through the serial interface. u ser -c onfigurable the zsbi050 offers the ?exibility to contgure the device to the customer?s specitcations. the fre- quency, timing pulse, duty cycle and triggering modes are all adjustable, thus providing superior performance. user-contgurable monostable and astable modes are easily selected through the external program- ming port, with the astable mode enabling addi- tional triggering controls not supported by other 555 timers. otp-p rogrammable the zsbi050 is controlled by 35 bits of nonvola- tile memory. these bits are shifted into an internal holding register, which acts like the non-volatile memory during calibration and testing. once the program characteristics have been determined, the date is burned into the internal memory. an optional security bit is provided to lock the device from being further modited. the zsbi050 offers an increase in accuracy over the traditional 555 timer. while operating in the variable duty cycle oscillator mode, the timer can operate with a precision of up to 0.1%. overall, the zsbi050 offers an increase of 5e7% accuracy over traditional 555 timers. band-gap voltage source mode control logic otp memory counter/timer zsbi050 o ne -t ime p rogrammable 555 t imer pb001900-sec1099
zilog w orldwide h eadquarters ? 910 e. h amilton a venue ? c ampbell , ca 95008 t elephone : 408.558.8500 ? f ax : 408.558.8300 ? i nternet : http :// www . zilog . com 2 i ndustry -s tandard p ackaging the zsbi050 is available in 8-pin dip or soic packages to accommodate surface mounting on densely- populated pcbs. zsbi050 b lock d iagram bandgap v source output control programming logic and otp memory input control (trigger mode) counters output input sclk sleep v ref pgrm
zilog w orldwide h eadquarters ? 910 e. h amilton a venue ? c ampbell , ca 95008 t elephone : 408.558.8500 ? f ax : 408.558.8300 ? i nternet : http :// www . zilog . com 3 p in -o uts and p in d irection a pplications and s upport t ools the following development tools are available for the programming and debugging of this device: development board/evaluation kit available early 2000 r elated p roducts security products of interest are: e lectrical f eatures s ummary zsbi050 f amily p in d iagram zsbi010 passive infrared ampliter for motion sensing, measurement, and detection o rdering i nformation part psi description zsbi050 sz000sc otp timer soic zsbi050 pz000sc otp timer pdip sclk input ref gnd v dd output sleep v pgm 8 8-pin dip/ soic 1 2 3 4 5 6 7
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