• State TI Thinks Resolved
  • Replies 2 replies
  • Answers 1 answer
  • Subscribers 47 subscribers
  • Views 41 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

  • 0
    TI__Guru 51946 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!