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PDF AS27C256 Data sheet ( Hoja de datos )
| Número de pieza | AS27C256 | |
| Descripción | 256K UVEPROM UV Erasable Programmable Read-Only Memory | |
| Fabricantes | Austin Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AS27C256 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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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
www.Data1S7h0enest4aUc.ccoemss
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 (-55oC to +125oC) M
Industrial (-40°C to +85°C)
I
Military Temp (-55oC to +125oC) XT
PIN ASSIGNMENT
(Top View)
28-Pin DIP (J)
(600 MIL)
VPP
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
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 DCQE71\
21 DDQQ68
Pin Name
Function
AP0in- NAa1m4e Address IFnupnucttsion
DQ0-DQ7 Inputs (programming)/Outputs
E\ Chip Enable/Power Down
G\ Output Enable
GND Ground
VCC 5V Supply
VPP 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.
1
1 page  
Austin Semiconductor, Inc.
UVEPROM
AS27C256
FIGURE 1. FLASHRITE PULSE PROGRAMMING FLOWCHART
Start
Address = First Location
VCC=6.25V, VPP=12.75V
X=0
Program One 100us Pulse
Programming
Section
Increment X
X = 25 ?
YES
FAIL
NO
Program
Verify
Byte?
Pass
Last
www.DataSheet4U.com Increment Address NO Address?
Yes
VCC = VPP = 5.25V
Read
Verify
Section
READ
Verify
Bytes?
FAIL
Pass
Device Passed
Device Failed
AS27C256
Rev. 2.0 7/06
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
5
5 Page 
Austin Semiconductor, Inc.
MECHANICAL DEFINITIONS*
UVEPROM
AS27C256
ASI Case #208 (Package Designator ECA)
D1
L1
A
E E1
e
See Detail A
D
www.DataSheet4U.com
Detail A
b1
L
b
SYMBOL
A
b
b1
D
D1
E
E1
e
L
L1
SMD SPECIFICATIONS
MIN
MAX
0.060
0.120
0.022
0.028
0.006
0.022
0.442
0.458
0.300 BSC
0.540
0.560
0.400 BSC
0.050 BSC
0.045
0.055
0.075
0.095
*All measurements are in inches.
AS27C256
Rev. 2.0 7/06
11
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet AS27C256.PDF ] | |
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