Replace obsolete Quad NPN
Found replacement part for Quad NPN transistor on Scoutfly
Should update schematic to follow this.
#3 Updated by Dan Shope over 10 years ago
Good catch. We are replacing this part: http://www.newark.com/fairchild-semiconductor/mmpq3904/bipolar-transistor-quad-npn-40v/dp/78K6028?Ntt=MMPQ3904
#4 Updated by Dan Shope over 10 years ago
All the quad NPN transistors I can find (in a SOIC-16 package) are end of life/obsolete. Digikey/Mouser don't carry any at all (all 0 stock). We might need to switch packages completely, and roll this change into Scoutfly v1.2 - we DO have some of the old SOIC-16 part in stock for v1.1 prototyping.
#5 Updated by Dan Shope over 10 years ago
Dual NPN, 500mA carrying current, 5V Base, Cheap
Mouser search results":http://www.mouser.com/Semiconductors/Discrete-Semiconductors/Transistors-General-Purpose/Bipolar-Small-"Signal/_/N-7h7n6?P=1z0xz4pZ1z0y4diZ1z0w4j8Z1z0w9spZ1z0w53mZ1z0w7u8Z1z0wajeZ1z0w6wj&Keyword=dual+npn&FS=True&Ns=Pricing|0
#6 Updated by Chris Mar about 10 years ago
- Status changed from Assigned to Fixed
- Target version changed from 1.0 to 1.2
created new BC817DS dual NPN part in kwoo library. used existing TSOP 6 package after verifying dimensions against datasheet. replaced quad NPN (MMPQ3904) with two dual NPNs in the BOM circuit. changes have been committed.