mc14c89b ON Semiconductor, mc14c89b Datasheet
mc14c89b
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mc14c89b Summary of contents
Page 1
... LSTTL and CMOS compatibility for easy interface to +5.0 V digital systems. Internal time−domain filtering eliminates the need for external filter capacitors in most cases. The MC14C89B has an input hysteresis of 0.35 V, while the MC14C89AB hysteresis is 0.95 V. The response control pins allow adjustment of the threshold level if desired. Additionally, an external capacitor may be added for additional noise filtering ...
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... CC Normally High Output shorted to ground Normally Low Output shorted Input Threshold Voltage ( (MC14C89AB, see Figure 5) Low Level High Level (MC14C89B, see Figure 6) Low Level High Level Input Impedance (+4 +5.5 V − Typicals reflect performance @ T = 25°C A **Only one output shorted at a time, for not more than 1.0 seconds. ...
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... The MC14C89B and MC14C89AB are designed to comply with EIA−232−E (formerly RS−232), the newer EIA−562 (which is a higher speed version of the EIA−232), and CCITT V.28 Recommendations. EIA−562 was written around modern integrated circuit technology, whereas EIA−232 retains many of the specifications written around the electro− ...
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... OL out 0 4.5 4.7 4.9 5 SUPPLY VOLTAGE (V) CC Figure 3. Typical Output Voltage versus Temperatur 5.0 4.0 MC14C89AB MC14C89B T = 25°C A 3.0 2.0 1.0 0 5.3 5.5 −40 http://onsemi.com 4 = −20 μ out MC14C89AB −3.2 mA) OH out MC14C89B 3.2 mA) OL out −7 AMBIENT TEMPERATURE (° ...
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... 1.4 1.2 1.0 0.8 57.5 85 −40 5 4.0 3 2.0 1 Figure 8. Typical Noise Pulse Rejection MC14C89AB MC14C89B Pulse Rate = 300 kHz RC Pin Open Noise Pulse Rejection 1.6 1.8 2.0 2.2 2.4 PW, INPUT PULSE WIDTH (μs) http://onsemi.com 5 Figure 5. Typical Threshold Voltage versus Temperature V IH MC14C89AB 4 −7 AMBIENT TEMPERATURE (° ...
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... Description The MC14C89AB and MC14C89B are designed to be direct replacements for the MC1489A and MC1489. Both devices meet all EIA−232 specifications and also the faster EIA−562 and CCITT V.28 specifications. Noise pulse rejection circuitry eliminates the need for most response control filter capacitors but does not exclude the possibility as filtering is still possible at the Response Control (RC) pins ...
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... V can be found by calculating for V IH adding the hysteresis for each device (0.35 for the MC14C89B or 0.95 V for the MC14C89AB). Figure 7 plots equation (1) for two values of V and a range bat pin used for low pass filtering, the capacitor chosen ...
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... C 1.35 1.75 0.054 0.068 D 0.35 0.49 0.014 0.019 F 0.40 1.25 0.016 0.049 J G 1.27 BSC 0.050 BSC J 0.19 0.25 0.008 0.009 K 0.10 0.25 0.004 0.009 5.80 6.20 0.228 0.244 R 0.25 0.50 0.010 0.019 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative MC14C89B/D _ ...