27c256t Maxwell Technologies, 27c256t Datasheet

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27c256t

Manufacturer Part Number
27c256t
Description
256k 32k X 8-bit Otp Eprom
Manufacturer
Maxwell Technologies
Datasheet
F
• 32K x 8-bit OTP EPROM organization
• R
• Total dose hardness:
• Excellent Single Event Effects:
• Package:
• Fast access time:
• Low power dissipation:
• Programming power supply:
• One-time programmable
• Pin arrangement
(858) 503-3300 - Fax: (858) 503-3301 - www.maxwell.com
EATURES
- > 100 Krad (Si), depending upon space mission
-SEL
-SEU
-32 pin R
-32 pin R
- 120, 150, 200 ns (max)
- Active mode: 100 mW/MHz (typ)
- Standby mode: 10 µ W (typ)
Page programming time: 14 sec (typ)
- V
- JEDEC standard byte-wide EPROM
- Flash memory and mask ROM compatible
radiation
AD
PP
-P
TH
TH
= 12.5 V
AK
NC
> 80 MeV/mg/cm2
® radiation-hardened against natural space
> 80 Mev/mg/cm2
AD
AD
-P
-P
:
AK
AK
® flat pack
® DIP
27C256T
A12-A16
A12-A14
06.24.02 REV 4
A5-A9
I/O15
I/O 7
I/O0
PGM
CE
OE
V
V
V
CC
PP
SS
D
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 R
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, R
krad (Si) radiation dose tolerance. This product is available
with screening up to Class S.
256K (32K x 8-Bit) OTP EPROM
ESCRIPTION
H
All data sheets are subject to change without notice
Logic Diagram
:
x-Decoder
AD
Control
Input
Data
-P
H
AK
® provides greater than 100
AD
: High Threshhold Inverter
-P
A0-A4
Y - Decoder
AK
©2003 Maxwell Technologies
Y- Gating
27C256T
Memory Matrix
1024 x 1022
® packaging technol-
A10-A11
All rights reserved.
1

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27c256t Summary of contents

Page 1

... The 27C256T features fast address times and low power dissipation. The 27C256T offers high speed programming using page pro- gramming mode. Maxwell Technologies' patented R AD ogy incorporates radiation shielding in the microcircuit pack- age ...

Page 2

... OTP EPROM T ABLE 12-5, 27, 26, 23, 25 13-15, 17- 27C256T A ABLE PARAMETER 1 Supply Voltage Programming Voltage 1 All Input and Output Voltage 1,2 A9 and OE Voltage Thermal Resistance Operating Temperature Range Storage Temperature Range 1. Relative ...

Page 3

... Operating Temperature Range 1. V min = -1.0V for pulse width < max = V + 1.5V for pulse width < PARAMETER Input Capacitance Output Capacitance 1. Guaranteed by design 27C256T DC E ABLE ( 10 PARAMETER TEST CONDITION Input Leakage Current Output Leakage Current V = 5.5 V/0.45 V ...

Page 4

... OTP EPROM T 7. 27C256T AC E ABLE ( 10 PARAMETER TEST CONDITION Address Access Time -120 -150 -200 Chip Enable Access Time -120 -150 -200 Output Enable Access Time -120 -150 -200 Output Hold to Address Change ...

Page 5

... OTP EPROM T 8. 27C256T AC E ABLE LECTRICAL (V CC PARAMETER Address Setup Time Address Hold Time Data Setup Time Data Hold Time V Setup Time PP V Setup Time CC Output Enable Setup Time Output Disable Time CE Initial Programming Pulse Width CE Overprogramming Pulse Width ...

Page 6

... IL T ABLE M ODE Read Output Disable Standby Program Program Verify Page Data Latch Page Program Program Inhibit Identifier Don’t care 11.5V < V < 12.5V. H 10. 27C256T M S ODE ELECTION ...

Page 7

... OTP EPROM IGURE EAD IMING AVEFORM 06.24.03 REV 4 All data sheets are subject to change without notice 27C256T 7 ©2003 Maxwell Technologies All rights reserved. ...

Page 8

... PW VERIFY B GO Program t =0.2ms OPW NO Last Address? YES SET PAGE MODE A V =5.0+0.25V READ All Address GO END 06.24.03 REV 4 All data sheets are subject to change without notice 27C256T n NO YES n=25 NOGO = NOGO FAIL 8 ©2003 Maxwell Technologies All rights reserved. ...

Page 9

... OTP EPROM IGURE AGE ROGRAMMING IMING AVEFORM 06.24.03 REV 4 All data sheets are subject to change without notice 27C256T 9 ©2003 Maxwell Technologies All rights reserved. ...

Page 10

... PP CC Address=0 n=0 n+1 n Program t =1ms+5% PW NOGO VERIFY GO Program t =0.2ms OPW Last Address? YES SET PAGE MODE V =5.0+0.25V READ NOGO All Address GO END 06.24.03 REV 4 All data sheets are subject to change without notice 27C256T NO n=25 YES FAIL 10 ©2003 Maxwell Technologies All rights reserved. ...

Page 11

... ESCRIPTION The Device Identifier Mode allows binary codes to be read from the outputs that identify the manufacturer and the type of device. Using this mode with programming equipment, the device will automatically match its own erase and pro- gramming algorithm. 27C256T I/O ...

Page 12

... BSC 0.300 BSC 0.100 BSC 0.135 0.145 0.015 0.035 0.005 0.025 0.005 -- 32 Note: All dimensions in inches 06.24.03 REV 4 All data sheets are subject to change without notice 27C256T M AX 0.240 0.026 0.065 0.018 1.680 0.620 0.155 0.070 -- -- 12 ©2003 Maxwell Technologies All rights reserved. ...

Page 13

... Any claim against Maxwell Technologies must be made within 90 days from the date of shipment from Maxwell Tech- nologies. Maxwell Technologies’ liability shall be limited to replacement of defective parts. 06.24.03 REV 4 All data sheets are subject to change without notice 27C256T 13 ©2003 Maxwell Technologies All rights reserved. ...

Page 14

... OTP EPROM Product Ordering Options Model Number 27C256T -XX Feature Option Details Access Time 12 = 120 150 200 ns Screening Flow Monolithic S = Maxwell Class Maxwell Class Industrial (testing @ -55°C, +25°C, +125° Engineering (testing @ +25°C) ...

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