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NE5090N Datasheet(PDF) 4 Page - NXP Semiconductors |
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NE5090N Datasheet(HTML) 4 Page - NXP Semiconductors |
4 / 6 page Philips Semiconductors Linear Products Product specification NE/SA5090 Addressable relay driver August 31, 1994 515 SWITCHING CHARACTERISTICS VCC=5V, TA=25°C, VOUT=5V, IOUT=100MA, VIL=0.8V, VIH=2.0V. SYMBOL PARAMETER TO FROM MIN TYP MAX UNIT Propagation delay time tPLH Low-to-high1 Output CE 900 1800 ns tPHL High-to-low1 130 260 tPLH Low-to-high2 920 1850 Output Data ns tPHL High-to-low2 130 260 tPLH Low-to-high3 900 1800 Output Address ns tPHL High-to-low3 130 260 tPLH Low-to-high4 920 1850 Output CLR ns tPHL High-to-low4 Switching setup requirements tS(H) Setup time high Setup time low Chip enable Chip enable High data Low data 40 50 ns tS(A) Address setup time Chip enable Address 40 ns tH(H) Hold time high Hold time low Chip enable Chip enable High data Low data 10 10 ns tPW(E) Chip enable pulse width1 40 ns NOTES: 1. See Turn-On and Turn-Off Delays, Enable-to-Output and Enable Pulse Width timing diagram. 2. See Turn-On and Turn-Off Delays, Data-to-Output timing diagram. 3. See Turn-On and Turn-Off Delays, Address-to-Output timing diagram. 4. See Turn-Off Delay, Clear-to-Output timing diagram. 5. See Setup and Hold Time, Data-to-Enable timing diagram. 6. See Setup Time, Address-to-Enable timing diagram. FUNCTIONAL DESCRIPTION This peripheral driver has latched outputs which hold the input date until cleared. The NE5090 has active-Low, open-collector outputs, all of which are cleared when power is first applied. This device is identical to the NE590, except the outputs can withstand 28V. Addressable Latch Function Any given output can be turned on or off by presenting the address of the output to be set or cleared to the three address pins, by holding the “D” input High to turn on the selected output, or by holding it Low to turn off, holding the CLR input High, and bringing the CE input Low. Once an output is turned on or off, it will remain so until addressed again, or until all outputs are cleared by bringing the CLR input Low while holding the CE input High. Demultiplexer Operation By holding the CLR and CE inputs Low and the ”D“ input High, the addressed output will remain on and all other outputs will be off. High Current Outputs The obvious advantage of this device over other drivers such as the 9334 and N74LS259 is the fact that the outputs of the NE5090 are each capable of 200mA and 28V. It must be noted, however, that the total power dissipation would be over 2.5W if all 8 outputs were on together and carrying 200mA each. Since the total power dissipation is limited by the package to 1W, and since power dissipation due to supply current is 0.25W, the total load power dissipation by the device is limited to 0.75W at room temperature, and decreases as ambient temperature rises. The maximum die junction temperature must be limited to 165 °C, and the temperature rise above ambient and the junction temperature are defined as: TR=θJA×PD TJ =TA+tR where For example, if we are using the NE5090 in a plastic package in an application where the ambient temperature is never expected to rise above 50 °C, and the output current at the 8 outputs, when on, are 100, 40, 50, 200, 15, 30, 80, and 10mA, we find from the graph of output voltage vs load current that the output voltages are expected to be about 0.92, 0.75, 0.78, 1.04, 0.5, 0.7, 0.9, and 0.4V, respectively. Total device power due to these loads is found to be 473.5mW. Adding the 200mW due to the power supply brings total device power dissipation to 723.5mW. The thermal resistances are 83 °C,per W for plastic packages and 100°C per W for Cerdips. Using the equations above we find: Plastic TR=83×0.7235=60°C Plastic TJ =50+60=100°C Cerdip TR=100×0.7235=72.4°C Cerdip TJ =50+72.4=122.4°C Thus we find that TJ for either package is below the 165°C maximum and either package could be used in this application. The graphs of total load power vs ambient temperature would also give us this same information, although interpreting the graphs would not yield the same accuracy. |
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