• State Resolved
  • Locked Locked
  • Replies 6 replies
  • Subscribers 48 subscribers
  • Views 223 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Original question:

LM139AQML-SP: LM139AW-SMD vs 5962

LM139AQML: LM139AW-SMD Radiation Harden

SJ Park
Prodigy 10 points
Part Number: LM139AQML
Other Parts Discussed in Thread: LM139A, , LM139A-MIL, LM139-MIL

Tool/software:

Hi TI Team,

I am a bit confused about the specs of LM139AW-SMD.

Let me explain the background story:

We initially picked out 5962R9673801VDA as it's a Rad Hardened component.

Due to lead time and cost concerns, we have found LM139AW-SMD.

From this datasheet, it is written in the introduction that Rad Harden components are available: LM139AQML

In the following picture from that datasheet, LM139AW-SMD is suppose to have a device marking as 5962-8773901DA.

However, under "LM139A SMD 5962–8773901 Electrical Characteristics DC Parameters", the title for 5962-8773901 does not have "QMLV & RH" while 5962R9673801 section contains "LM139A 883, QMLV & RH, SMD 5962–9673801 Electrical Characteristics DC Parameters".

1. Does this mean that LM139AW-SMD = 5962-8773901 = Not a Rad Hardened part? Could you confirm that "RH" means Radiation Hardened? This kind of aligns with LM139A-MIL. 5962-8773901 is also listed in this MIL datasheet, but this datasheet never mentions about Radiation Hardening.

2. Also, the LM139AQML datasheet lists LM139AW-SMD as "CFP-NAD" package, while the MIL datasheet lists 5962-8773901 as "CFP-W". Which package is correct for LM139AW-SMD?

3. Although both datasheet both contain "LM139AW-SMD or 5962-8773901", the ThetaJC seems to differ between the two. LM139AQML datasheet says 23°C/W, while LM139A-MIL datasheet says 86.7°C/W. Which one is correct?

4. Are the internal dies and structures the same in between LM139AW-SMD and 5962R9673801VDA ?

Thank you!

  • 0
    Prodigy 10 points

    It looks like the picture is somewhat broken. The same picture can be found in "LM139AQML" datasheet under PACKAGING INFORMATION section.

  • +1
    TI__Guru 53036 points

    Hello SJ,

    #1 - The dash in the part number, after the 5962, means it is NOT Rad Hard. For TI, there will be either be "R" or "L"

    If it was rad-hard, the dash would be replaced with one of the following depending on dose rate:

    TI generally has "R" or "L" for rad hard devices.

    #2 - The "W" is the designator for the untrimmed ceramic flat-pack package. "W" was the original National Semi package designator. TI's package designator is NAD. The "A" is the A grade spec (lower offset/bias current) and is part of the LM139A family.

    The "LM139A 883, QMLV & RH, SMD 5962–9673801" is a word-salad. What it is saying is "LM139A, 883, QMLV, and Radiation Hardened versions AND also SMD 5962–9673801" devices. So there are both rad-hard and non-rad hard devices in that table.

    #3 - 5962-8773901 is a SMD - and is a general specification. Two devices fall under this SMD, one from the former National Semiconductor (LM139AQML) and a native TI device (LM139-MIL).

    5962-8773901 = LM139AWB = TI Die

    LM139AW-SMD = National Die

    Two different die from two different manufacturers (at the time). But both meet the 5962-8773901 SMD.

    #4 Yes. Same die revision and package. LM139AW-SMD does not go through radiation testing.

    So if you need the "same" device, but not Rad Hard, the LM139AW-SMD would be the choice.

    Whew!

  • 0 in reply to Paul Grohe
    Prodigy 10 points

    Thanks for the long and detailed information Paul.

    If I understood you correctly, I'd like to confirm the following..! after incorporating your answers.

    I have additional questions as well.

    "W" = National

    "NAD" = TI

    5962-8773901 = TI = LM139-MIL

    LM139AW-SMD = National

    Question:

    1. If 5962R9673801VDA  has the same die revision and package as LM139AW-SMD,

    5962R9673801VDA  = National?

    LM139AW-SMD = Non-Rad version of 5962R9673801VDA?

    2. So, for LM139AW-SMD, follow the specs including ThetaJC from LM139AQML(National) datasheet since this is National Die?

    (and NOT LM139-MIL as that is for TI Die such as 5962-8773901)

    Again, 

    LM139AQML(National) datasheet says 23°C/W, and

    LM139A-MIL(TI) datasheet says 86.7°C/W

    In other words, LM139AW-SMD follows the same ThetaJC as 5962R9673801VDA which is 23°C/W?

    3. If the package designators are

    "W" = National

    "NAD" = TI

    Why do

    National Semiconductor (LM139AQML) lists LM139AW-SMD as "NAD" Link of LM139AQML

    and a native TI device (LM139-MIL) lists "W"..? Link of LM139-MIL

    Are they flipped? since "NAD" is TI's and "W" is from National..?

  • 0 in reply to SJ Park
    TI__Expert 4460 points

    Hi SJ,

    Please give me some time to get answers to these questions.

  • +1 in reply to SJ Park
    TI__Guru 53036 points

    Hi SJ,

    #1. Yes. 5962R9673801VDA = LM139AW-SMD *minus* the radiation testing. We cannot say they are *exactly* the same die as space die can go through additional processing...but they are basically the same (same design, process, basic die ID, size and revision). Electrically, there should be no difference. Both are ex-National die.

    #2...I cannot comment on the tJA numbers. Again, these were numbers from two different companies with two different die at the time - and we have to stick with the published numbers. The LM139A-MIL is a different die from the National die.

    #3 Two different companies at the time. National called it the "W' package back in the early 1970's, and TI called it the NAD package when they  second-sourced it. You will have to ask the retired guys why they did not use "W"... "NAD" = "W."

    Do not rely on package as to which die is contained. The SMD 5962-8773901 is a generic specification and both die meet the specification.

    Depending on options, you can get either die. From what  I see, the 5962-87739012A (LM139QML) will get you the National die. The others will get you the TI die (LM139-MIL).

  • 0 in reply to Paul Grohe
    Prodigy 10 points

    Thanks for confirmation Paul!