m74hc4538 STMicroelectronics, m74hc4538 Datasheet
m74hc4538
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m74hc4538 Summary of contents
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... M74HC4538B1R M74HC4538RM13TR M74HC4538TTR May 2008 Dual retriggerable monostable multivibrator = 6 V Description The M74HC4538 is a high speed CMOS monostable multivibrator fabricated with silicon gate C = 4.5 V technology. CC Each multivibrator features both a negative A, and a positive B, edge triggered input, either of which can be used as an inhibit input. Also included is a clear input that when taken low resets the one shot ...
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... External resistor, capacitor connections 1CD, 2CD Direct reset inputs (active low) 1A, 2A Trigger inputs (low to high, edge-triggered) 1B, 2B Trigger inputs (high to low, edge-triggered) Q1, Q2 Pulse outputs Q1, Q2 Complementary pulse outputs GND Ground ( Positive supply voltage CC M74HC4538 Name and function ...
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... M74HC4538 Figure 2. Input and output equivalent circuit Table 3. Truth table Inputs Figure 3. System diagram Input GND GND Pin connection and IEC logic symbols Output Outputs Note Q Output enable H Inhibit H Inhibit ...
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... In cases where Cx is large the time taken for the supply voltage to fall to 0.4 V can be calculated as follows cases where t f current. 4/18 in the standby state, i.e. no trigger. When the supply voltage is CC > 0.7) x Cx/20 mA too short an external clamping diode is required to protect the IC from the surge M74HC4538 decreases slowly, the surge current ...
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... M74HC4538 2 Functional description Standby state The external capacitor Cx, is fully charged to V triggering, transistor Qp and Qn (connected to the Rx/Cx node) are both turned-off. The two comparators that control the timing and the two reference voltage sources stop operating. The total supply current is therefore only leakage current. ...
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... Operating temperature Input rise and fall time (CD only External capacitor Rx External resistor 6/18 Parameter or ground current ° C from 65 Parameter M74HC4538 Value -0 -0 0 0.5 CC ± 20 ± 20 ± 25 ± 50 (1) 500 -65 to +150 300 ° ° Value ...
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... M74HC4538 4 Electrical characteristics Table 6. DC specifications Symbol Parameter V High level input V IH voltage Low level input V IL voltage High level output V OH voltage Low level output V OL voltage Input leakage I I current Input leakage I I current Quiescent supply I CC current Quiescent supply ...
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... M74HC4538 Unit Max 110 375 295 1800 375 ns 320 96 μ 0.9 0.8 ms 0.8 % 110 110 ...
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... M74HC4538 Table 7. AC electrical characteristics (C Symbol Parameter V Minimum t rr retrigger time Table 8. Capacitive characteristics Symbol Parameter C Input capacitance IN Power dissipation C PD (1) capacitance defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current PD consumption without load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ...
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... Electrical characteristics Figure 6. Test circuit Figure 7. Waveform: propagation delay times ( MHz; 50% duty cycle) 10/18 M74HC4538 ...
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... M74HC4538 5 Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK packages. These packages have a Lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label ...
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... Package mechanical data DIM 12/18 Plastic DIP-16 (0.25) MECHANICAL DATA mm. MIN. TYP MAX. 0.51 0.77 1.65 0.5 0.25 20 8.5 2.54 17.78 7.1 5.1 3.3 1.27 M74HC4538 inch MIN. TYP. MAX. 0.020 0.030 0.065 0.020 0.010 0.787 0.335 0.100 0.700 0.280 0.201 0.130 0.050 P001C ...
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... M74HC4538 DIM SO-16 MECHANICAL DATA mm. MIN. TYP MAX. 1.75 0.1 0.25 1.64 0.35 0.46 0.19 0.25 0.5 45° (typ.) 9.8 10 5.8 6.2 1.27 8.89 3.8 4.0 4.6 5.3 0.5 1.27 0.62 8° (max.) Package mechanical data inch MIN. TYP. MAX. 0.068 0.004 0.010 0.063 0.013 0.018 0.007 0.010 0.019 0.385 0.393 0.228 0.244 0.050 ...
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... TYP MAX. 1.2 0.05 0.15 0.8 1 1.05 0.19 0.30 0.09 0.20 4.9 5 5.1 6.2 6.4 6.6 4.3 4.4 4.48 0.65 BSC 0° 8° 0.45 0.60 0. M74HC4538 inch MIN. TYP. 0.002 0.004 0.031 0.039 0.007 0.004 0.0079 0.193 0.197 0.244 0.252 0.169 0.173 0.0256 BSC 0° 0.018 0.024 0080338D MAX. 0.047 0.006 0.041 0.012 0.201 0.260 0.176 8° ...
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... M74HC4538 DIM Tape & Reel SO-16 MECHANICAL DATA mm. MIN. TYP MAX. 330 12.8 13.2 20.2 60 22.4 6.45 6.65 10.3 10.5 2.1 2.3 3.9 4.1 7.9 8.1 Package mechanical data inch MIN. TYP. MAX. 12.992 0.504 0.519 0.795 2.362 0.882 0.254 0.262 0.406 0.414 0.082 0.090 0.153 0.161 0.311 0.319 15/18 ...
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... Package mechanical data DIM 16/18 Tape & Reel TSSOP16 MECHANICAL DATA mm. MIN. TYP MAX. 330 12.8 13.2 20.2 60 22.4 6.7 6.9 5.3 5.5 1.6 1.8 3.9 4.1 7.9 8.1 M74HC4538 inch MIN. TYP. MAX. 12.992 0.504 0.519 0.795 2.362 0.882 0.264 0.272 0.209 0.217 0.063 0.071 0.153 0.161 0.311 0.319 ...
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... M74HC4538 6 Revision history Table 9. Document revision history Date 01-Jul-2001 26-May-2008 Revision 1 Initial release. Document converted and restructured to new template. Removed: M74HC4538M1R order code. 2 Minor text changes. Added: SO-16 and TSSOP16 tape and reel specifications. Revision history Changes 17/18 ...
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... Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 18/18 Please Read Carefully: © 2008 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com M74HC4538 ...