The SGA is a high performance SiGe HBT. MMIC Amplifier. NOTE: The recommended operating current in the preliminary datasheet was mA. MOSFET are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for MOSFET. Datasheet, In Stock. SN datasheet, SN circuit, SN data sheet: TI – BIT RANDOM- ACCESS READ/WRITE MEMORY,alldatasheet, datasheet, Datasheet search site.

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To comment, click on the “add a comment” link by the answer or question your commenting to. At ohms the current is Is all that matters what the LEDs need or is there something relating to the that helps determine the size of the pull-up resistors?

schematics – Why are two LEDs on? is broken? – Electrical Engineering Stack Exchange

For LED drive, you do the same thing: Also, for the inputs address and data input I did choose 4. Datssheet see that for the question on how big a pull-up resistor in general should be. Have I understood this correctly? I have some jumper cables to control the input pins 4, 6, 10, 12 and I have been connecting them to either ground or 5V directly. If the IC’s output is irrational then it is oscillating or it is blown.

I would hook the up as follows:. If it is only the LEDs forward voltage 2V and current 0. Can you remember how you wired it up? For your switched inputs, a pullup resistor ought not to burn up, nor prevent a logic LOW level suitable for the inputs 0.

SN Datasheet(PDF) – TI store

R4 should be ON. It may not be able to drive LED’s directly. If I connect the ME to high, then this behavior does not change. Sign up or log in Sign up using Google. We Lo, the truth table on the data sheet says that if both are low the state when you have the switch closedall data outputs will be Hi. Sign up using Facebook. Sign up using Email and Password. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

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WE to replace the overscore notatation used for active low in the datasheet – you have! If the LEDs drop 2 volts, assume there is 3 volts across the resistors there’s be a bit less, because the can’t pull its outputs quite to groundthen for 20 mA, you’d want Ohms. Could you show a schematic of how you connected it? I have been learning about the memory chip. Sign up or log in Sign up using Google. A shunt resistor in parallel with the LED will ensure lights-off, and may improve the high-side logic margin because of the up-to-2V offset from the LED.

WE state – and if they’re high they shouldn’t be able to light the Dxtasheet. ME high should leave datashert high. Without the switch closed, the LED D1 is on. Home Questions Tags Users Unanswered. I got carried away that I might be able to help – so carried away that I didn’t see you’d put in a more succinct answer before I sent in my blurb: What MIGHT limit it, is the drive impedance with respect to input capacitance of the input pin; if there are transmission lines connected, a ohm pullup and ohm pulldown to ground gives good drive circa ohms to 3Vsuitable for the load of the cable.

What am I doing wrong? Sparky 11k 2 15 Sign up using Facebook. Sign up using Email and Password. Home Questions Tags Users Unanswered. How can one determine an appropriate pull-up resistor? ME always low, and hopefully can toggle!

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That is what I was thinking. So now I have the following schematics more or less copied from here. Use the ‘ ‘ symbol to find names in a long list of comments so that person gets the comment sent to them. The outputs are inverted OC type. Schematics for using IC memory Ask Question.

Post as a guest Name. Email Required, but never shown. From this answerI learned the basic idea of how to set up the circuit. The outputs are “active low” – if you write a High 1 to a memory location, you will read back a Low 0. I had two of these that fatasheet out to be broken see here for previous question on this. After playing around for some time with the IC, it got really hot and I am afraid that I ruined the chip.

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(PDF) 7489 Datasheet download

I bought two SN because I wanted to learn how the memory chip works. The following works well!

Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these datashet. I am guessing that the s that I got are broken. This is a follow up question to this question.