U2391B TEMIC | Alldatasheet
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Technical content
Features
/C0068Standard quartz fosc = 32.768 kHz /C0068Minimum operating voltage 4.5 V/1.5 mA /C0068Pulse width, tp = 31.25 ms /C0068Power stage with current limitation: typical 150 mA /C0068Tristate period selection: 1/36/60 s /C0068Reset and disable possibility /C0068Operation with C /C0121 33 pF, as operational time counter possible /C0068Minimum dimensions due to SO-case Application Operational time counter Case: SO8 Block Diagram Selection logic36 Tristate Pulse former Programmable divider Switch on monitoring Divider 2
16 Hz Divider 2
V S = 4.75 to 14 V Start with VS Reset Tristate Interrupt 2048 Hz 5 32768 Hz To test 36 s 60 s 1 s 0.22 F Reset Interrupt 390 R L 10 x VS in Ohm 10 F 96 11740 /C0119 /C0109 /C0109 /C0087 Figure 1. Block diagram with external circuit
Rev. A1, 30-May-96 Preliminary Information 2 (7) Pin Description Pin Symbol Function
1 Period Period selection input
2 GND Ground
3 Output Output control pulse
4 Contr. Control input 5, 6 Osc. Quartz-oscillator input
7 Test Test logic input/output
8 V S Supply voltage
Contr. V S Test Osc. Osc. Figure 2. Pinning
Description
Pin 1, Period Selection Logic Period selection at Pin 1 is as follows: Pin 1 = open, /C0116 /C0061 /C0051/C0054/C0032s Pin 1 = ground /C0116 = 1 s Pin 1 = VS (Pin 8), /C0116 = 60 s Pin 2, Ground Pin 3, Output Stage Output stage, being short circuit protected is limited to a current value of typical 150 mA. Apart from it, there is a voltage limitation which controls the power stage at the rate of V 3 /C0119 28.8 to 32 V and serves as an active Z-diode. Output pulse width is 31.25 ms when quartz frequency is 32.768 kHz. It is independent of the selected period. Pin 4, Control Logic /C0068Counting delay is typ 1.5 s (maximum 8 s) when Pin 4 is open and VS is switched on. /C0068Programmable residual divider /C0116 /C01211 s is reseated if Pin 4 is connected to Pin 8. This results in an absolute tolerance, at the start across “Reset/End” to be /C0118 1 s. /C0068Clock input to the 27 divider is inhibited, if Pin 4 is connected to the ground (Pin 2). Absolute tolerance for every interruption is /C0118 0.488 ms. /C0068An interruption is ignored (Pin 4 = /C0259) during the out- put pulse time. /C0068When Pin 4 is switched to VS during the output pulse time /C0042 this output pulse will be reseated. Pin 5, 6 Quartz-Oscillator Input The propagated period time selection is based on circuit with a low cost clock quartz of 32.768 kHz. Pin 7, Test Logic, Figure 2, 3 To test the circuit in a reasonable time, it is possible to control the divider (f o = 16 Hz) at Pin 7 as well as to feed in a higher frequency to the programmed residual counter i /C0118 2 kHz). Pin 8, Supply Voltage An operating voltage of 4.5 V is necessary for the func- tioning of the circuit, although an internal switch-on monitoring allows it to operate with a voltage of 3.6 V . This means that there is sufficient reliability for the per- formance of the circuit. The circuit is designed for 12 V /C0034 10% with internal sup- ply voltage limitation of typical 15 V . In case of higher voltages there is a need of a series resistance and buffer capacitance as shown in figure 1.
Rev. A1, 30-May-96 3 (7) Absolute Maximum Ratings Reference point Pin 2, unless otherwise specified Parameters Symbol Value Unit Supply current Pin 8 t /C0118 10 /C0109s IS is 150 mA Supply voltage Pin 8 without series resistance V S 13.2 V Voltages Selection logic Pin 1 Control logic Pin 4 Output stage, without protection circuit Pin 3 V 1 V 4 V 3 0 to VS 0 to VS 28.8 V Currents Test logic Pin 7 Oscillator Pin 5, 6 Output stage t /C0118 1 ms Pin 3 Iosc ± 100 ± 100 300 /C0109A /C0109A mA Power dissipation Tamb = 45°C Tamb = 85°C Ptot 270 135 mW Storage temperature range Tstg –40 to +125 °C Ambient temperature range Tamb –20 to +100 °C Junction temperature Tj 125 °C
Electrical Characteristics
V S = 5 V , Tamb = 25°C, figure 1, reference point Pin 2, unless otherwise specified Parameters Test Conditions / Pins Symbol Min. Typ. Max. Unit DC supply currents V 8 = 5 V Pin 8 V 8 = 12 V IS 1.2 1.5 mA Minimum supply voltage Pin 8 V S 4.5 V Supply voltage limitationI8 = 3 mA Pin 8 I8 = 30 mA V S 13.2 15 16.3 17.2 V Voltage monitoring Pin 8 Turn-on threshold V TON 3.6 V Turn-off threshold V TOFF 2.4 V Temperature coefficient –TC 0.33 %/K Selection logic Pin 1 = /C0259(1 s) Pin 1 = + (60 s) –I1 /C0109A Control logic Pin 4 = 0 V (Interrupt) Pin 4 = 5 V (Reset) Reset current –I4 –I4 65 135 1500 /C0109A Oscillator fosc = 32768 Hz, Cosc /C0119 33 pF Operating current Pin 5, 6 –Iosc 20 /C0109A Build-up time ton 1.5 8 s
Rev. A1, 30-May-96 Preliminary Information 6 (7) Dimensions in mm 94 8862
Rev. A1, 30-May-96 7 (7) 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. It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as ozone depleting substances (ODSs). The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs and forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban on these substances. TEMIC TELEFUNKEN microelectronic GmbH semiconductor division has been able to use its policy of continuous improvements to eliminate the use of ODSs listed in the following documents. 1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively 2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental Protection Agency (EPA) in the USA 3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively. TEMIC can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain such substances. We reserve the right to make changes to improve technical design and may do so without further notice. Parameters can vary in different applications. All operating parameters must be validated for each customer application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use. TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 (0)7131 67 2831, Fax number: 49 (0)7131 67 2423