{{tag>collection_FelineFriendly vendor_bosch year_1996 foundry_unknown tech_unknown}}

====== Description ======
This part was taken from a Motronic M1.7.3 engine control unit (ECU), which was commonly used on 1.6L & 1.8L 4-cylinder BMWs of the mid-E36 generation. While this chip was likely used on a number of ECUs, the specific one in this case had Bosch PN 0 261 203 661.

This chip is believed to be a Hitachi HM6264B 8KB SRAM. It provides XRAM to the 80C515 MCU used in the ECU.

Datasheet: [[http://esd.cs.ucr.edu/webres/hm6264b.pdf]]

====== Package ======
Label (top):

<code>
B57826 (Bosch internal PN)
JAPAN 9607HCK
</code>

{{:felinefriendly:bosch:b57826:s703_pkg.jpg?400|}}

====== Die ======

<code>
Decap Steps:
(Bic lighter + water quench) x 2 cycles
Selective crushing with pliers and bench vise

Capture Details:
Imaging device: Keyence VHX-2000
Magnification: 250X

Markings:
66460 (possibly, the die needs to be reimaged due to stitching errors)
</code>

The die seemed to have a polyimide ("Kapton") coating over most of its surface. Attempts to peel it off were unsuccessful, so it was imaged with this intact.

{{:felinefriendly:bosch:b57826:s703_die_coated_250x_small.jpg?400|}}


//Note: This is a ~4X downsampled version of the original image. A full resolution version (17MB) can be provided. On the to-do list...//