Toshiba TA7136P / P1 / AP
Posted: Fri Oct 15, 2021 1:41 pm
You all know that I like to collect pedal variants, and that I like the DS-1 very much...
And one thing that is not commented very often (never) about MIJ DS-1 is the "variants" of the Toshiba TA7136 chip.
TA7136P in a 7600 NOV 1978 DS-1:
TA7136P1 in a 8500 AUG 1979 DS-1:
TA7136AP in a 9600 JUL 1980 DS-1:
I understand that it is probably an evolution of the chip, little changes to improve energy consumption, lower signal to noise ratio, expand working temperature range, etc.
Nothing that would change it soundwise, I guess.
Could not find any datasheet from the early specimens, only from the late :
http://j5d2v7d7.stackpathcdn.com/wp-con ... A7136P.pdf
But found a picture from the equivalent circuit of the P1 version, and comparing it to the AP, as seen in the datasheet, there is a small difference:
TA7136P1
TA7136AP
Did you find it?
It is a diode, right in the middle of the circuit picture of the P1 version, and it is absent in the AP.
No info about the earliest P version.
So, if any of you guys have an "antique" datasheet of the P or P1 "variants", or have some knowledge about those small differences, please share it here with us, it will be very much appreciated.
And one thing that is not commented very often (never) about MIJ DS-1 is the "variants" of the Toshiba TA7136 chip.
TA7136P in a 7600 NOV 1978 DS-1:
TA7136P1 in a 8500 AUG 1979 DS-1:
TA7136AP in a 9600 JUL 1980 DS-1:
I understand that it is probably an evolution of the chip, little changes to improve energy consumption, lower signal to noise ratio, expand working temperature range, etc.
Nothing that would change it soundwise, I guess.
Could not find any datasheet from the early specimens, only from the late :
http://j5d2v7d7.stackpathcdn.com/wp-con ... A7136P.pdf
But found a picture from the equivalent circuit of the P1 version, and comparing it to the AP, as seen in the datasheet, there is a small difference:
TA7136P1
TA7136AP
Did you find it?
It is a diode, right in the middle of the circuit picture of the P1 version, and it is absent in the AP.
No info about the earliest P version.
So, if any of you guys have an "antique" datasheet of the P or P1 "variants", or have some knowledge about those small differences, please share it here with us, it will be very much appreciated.