27C256T Datasheet, PDF (1/14 Pages) Maxwell Technologies – 256K (32K x 8-Bit) OTP EPROM

27C256T
256K (32K x 8-Bit) OTP EPROM
NC
A5-A9
AA1122--AA1164
I/O0
II//OO175
x-Decoder
1024 x 1022
Memory Matrix
Input
Data
Control
Y- Gating
Y - Decoder
27C256T
FEATURES:
• 32K x 8-bit OTP EPROM organization
• RAD-PAK® radiation-hardened against natural space
radiation
• Total dose hardness:
- > 100 Krad (Si), depending upon space mission
• Excellent Single Event Effects:
-SEL_TH > 80 MeV/mg/cm2
-SEU_TH > 80 Mev/mg/cm2
• Package:
-32 pin RAD-PAK® flat pack
-32 pin RAD-PAK® DIP
• Fast access time:
- 120, 150, 200 ns (max)
• Low power dissipation:
- Active mode: 100 mW/MHz (typ)
- Standby mode: 10 µ W (typ)
Page programming time: 14 sec (typ)
• Programming power supply:
- V_PP = 12.5 V
• One-time programmable
• Pin arrangement
- JEDEC standard byte-wide EPROM
- Flash memory and mask ROM compatible
CE
OE
PGM
V_CC
V_PP
H
V_SS
A0-A4 A10-A11
H
: High Threshhold Inverter
Logic Diagram
DESCRIPTION:
Maxwell Technologies’ 27C256T high density 256-Kilobit one-
time programmable electrically programmable read only mem-
ory microcircuit features a greater than 100 krad (Si) total
dose tolerance, depending upon space mission. The 27C256T
features fast address times and low power dissipation. The
27C256T offers high speed programming using page pro-
gramming mode.
Maxwell Technologies' patented RAD-PAK® packaging technol-
ogy incorporates radiation shielding in the microcircuit pack-
age. It eliminates the need for box shielding while providing
the required radiation shielding for a lifetime in orbit or space
mission. In a GEO orbit, RAD-PAK® provides greater than 100
krad (Si) radiation dose tolerance. This product is available
with screening up to Class S.
06.24.02 REV 4
[phone] - Fax: [phone] - www.maxwell.com
All data sheets are subject to change without notice 1
©2003 Maxwell Technologies
All rights reserved.