Datasheet

DS87C520/DS83C520 EPROM/ROM High-Speed Microcontrollers
43 of 43
DATA SHEET REVISION SUMMARY
REVISION DESCRIPTION
110195 Preliminary release.
022097
1) Update ALE pin description.
2) Add note pertaining to erasure window.
3) Add note pertaining to internal MOVX SRAM.
4) Change Note 10 from RST = 5.5V to RST = V
CC
.
5) Change serial port mode 0 timing diagram label from t
QVXL
to t
QVXH
.
070698
1) Update PMM operating current estimates
2) Added note to clarify I
IL
specification.
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to 200kmaximum.
6) Corrected “Data memory write with stretch” diagrams to show falling edge of ALE coincident with
rising edge of C3 clock.
070300
1) Corrected P0 pinout description for TQFP package.
2) Clarified point at which reset delay begins.
040104
1) Removed “Preliminary” status.
2) Soldering temperature parameter now references JEDEC specification.
3) Added note to absolute maximums clarifying voltages referenced to ground.
4) Updated I
CC
, I
IDLE
, I
STOP
, I
SPBG
, I
IL
, and I
TL
to incorporate errata conditions.
5) Added note clarifying DC electrical test conditions.
6) Added note clarifying V
OH3
specification applies to first clock cycle following the transition.
7) Updated AC and MOVX electrical characteristics with final characterization values.
Added t
AVLL2
specification and corrected MOVX timing diagrams to show t
AVLL2
instead of t
AVLL
.
070505
1) Added Pb-free/RoHS-compliant part numbers to Ordering Information table.
2) Deleted the “A” from the IPC/JEDEC J-STD-020 specification in the Absolute Maximum Ratings.
091605
1) In DC Electrical Characteristics table, added separate specification for DS83C520 V
PFW
.
2) Changed V
RST
max to from 4.25V to 4.275V for DS83C520 value.
022207
1) (Page 30) In the Absolute Maximum Ratings table, changed the operating range from 0C to +70C to
-40C to +85C (correction for typographical error; this does not reflect a change in the device or device
testing).
2) (Page 33) In the MOVX Characteristics table, added Note 2 and changed t
RLAZ
max from Note 1 to
Note 2.
42 of 42
Maxim/Dallas Semiconductor cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim/Dallas Semiconductor product. No
circuit patent licenses are implied. Maxim/Dallas Semiconductor reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2007 Maxim Integrated Products
The Maxim logo is a registered trademark of Maxim Integrated Products, Inc. The Dallas logo is a registered trademark of Dallas Semiconductor Corporation.