AS27C256 Datasheet, PDF (1/13 Pages) Austin Semiconductor – 256K UVEPROM UV Erasable Programmable Read-Only Memory

Austin Semiconductor, Inc.
UVEPROM
AS27C256
256K UVEPROM
UV Erasable Programmable
Read-Only Memory
AVAILABLE AS MILITARY
SPECIFICATIONS
• -55C to 125C operation
• MILITARY Processing Method MIL-PRF-38535, Class Q
• Commercial Version Available
FEATURES
• Organized 32,768 x 8
• Single +5V ±10% power supply
• Pin-compatible with existing 256K ROM’s and EPROM’s
• All inputs/outputs fully TTL compatible
• Power-saving CMOS technology
• Very high-speed FLASHRITE Pulse Programming
• 3-state output buffers
• 400-mV DC assured noise immunity with standard TTL
loads
• Latchup immunity of 250 mA on all input and output pins
• Low power dissipation (CMOS Input Levels)
-Active - 165mW Worst Case
-Standby - 1.7mW Worst Case (CMOS-input levels)
* FUTURE High Speed Offerings: 55ns, 70ns, 90ns
OPTIONS
• Timing
120ns access
150ns access
170ns access
200ns access
250ns access
300ns access
55ns access
70ns access
90ns access
MARKING
-12
-15
-17
-20
-25
-30
-55
-70
-90
• Package(s)
Ceramic DIP (600mils) J No. 110
Ceramic LCC (450 x 550 mils) ECA No. 208
• Processing / Operating Temperature Ranges
Full Military (-55^oC to +125^oC) M
Industrial (-40°C to +85°C)
I
Military Temp (-55^oC to +125^oC) XT
PIN ASSIGNMENT
(Top View)
28-Pin DIP (J)
(600 MIL)
V_PP 1
A12 2
A7 3
A6 ⁴
A5 ⁵
A4 ⁶
A3 ⁷
A2 ⁸
A1 ⁹
A0 ¹⁰
DQ0 ¹¹
DQ1 ¹²
DQ2 ¹³
GND ¹⁴
28 ^Vcc
27 A14
26 A13
25 A8
24 A9
23 A11
22 G\
21 A10
20 E\
19 DQ7
18 DQ6
17 DQ5
16 DQ4
15 DQ3
32-Pin LCC (ECA)
(450 x 550 mils)
4 3 2 1 32 31 30
AA7 6 5
AA6 5 6
AA5 4 7
AA4 3 8
AA3 2 9
AA2 1 10
AA1 0 11
AN0C 12
DDQQ1 0 13
14 15 16 17 18 19 20
29 AW8 E \
28 AA913
27 AA181
26 NAC9
25 GA\11
24 AO10E \
23 EA\ 10
22 _DC_QE₇1\
21 _DD_QQ₆8
Pin Name
Function
A^P0ⁱⁿ- ^NA^a1^m4^e Address I^Fn^upⁿu^ct^ts^ion
DQ0-DQ7 Inputs (programming)/Outputs
E\ Chip Enable/Power Down
G\ Output Enable
GND Ground
V_CC 5V Supply
V_PP 13V Programming Power Supply
For more products and information
please visit our web site at
www.austinsemiconductor.com
AS27C256
Rev. 2.0 7/06
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
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