DS87C520/DS83C520 EPROM/ROM High-Speed Microcontrollers

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DATA SHEET REVISION SUMMARY

REVISION

DESCRIPTION

091605

070505

3) Added Pb-free/RoHS-compliant part numbers to Ordering Information table.

4) Deleted the “A” from the IPC/JEDEC J-STD-020 specification in the Absolute Maximum Ratings.

040104

5) Removed “Preliminary” status.

6) Soldering temperature parameter now references JEDEC specification.

7) Added note to absolute maximums clarifying voltages referenced to ground.

9) Added note clarifying DC electrical test conditions.

11) Updated AC and MOVX electrical characteristics with final characterization values.

070300

1) Corrected P0 pinout description for TQFP package.

2) Clarified point at which reset delay begins.

070698

1) Update PMM operating current estimates

3) Added note to prevent accidental corruption of Watchdog Timer count while changing counter length.

4) Changed minimum oscillator frequency to 1MHz when using external crystal.

5) Changed RST pulldown resistance from 170k

Ω to 200kΩ maximum.

6) Corrected “Data memory write with stretch” diagrams to show falling edge of ALE coincident with

rising edge of C3 clock.

022097

1) Update ALE pin description.

2) Add note pertaining to erasure window.

3) Add note pertaining to internal MOVX SRAM.

110195

Preliminary release.