as27c256 Austin Semiconductor, Inc., as27c256 Datasheet

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as27c256

Manufacturer Part Number
as27c256
Description
Uv Erasable Programmable Read-only Memory
Manufacturer
Austin Semiconductor, Inc.
Datasheet
AVAILABLE AS MILITARY
• -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
• Latchup immunity of 250 mA on all input and output pins
• Low power dissipation (CMOS Input Levels)
* FUTURE High Speed Offerings: 55ns, 70ns, 90ns
OPTIONS
• Timing
• Package(s)
• Processing / Operating Temperature Ranges
AS27C256
Rev. 2.0 7/06
256K UVEPROM
UV Erasable Programmable
Read-Only Memory
SPECIFICATIONS
-Active - 165mW Worst Case
-Standby - 1.7mW Worst Case (CMOS-input levels)
120ns access
150ns access
170ns access
200ns access
250ns access
300ns access
55ns access
70ns access
90ns access
Ceramic DIP (600mils)
Ceramic LCC (450 x 550 mils) ECA No. 208
Full Military (-55
Industrial (-40°C to +85°C)
Military Temp (-55
loads
o
C to +125
o
C to +125
o
C)
J
o
Austin Semiconductor, Inc.
C) XT
MARKING
No. 110
-12
-15
-17
-20
-25
-30
-55
-70
-90
M
I
1
For more products and information
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
www.austinsemiconductor.com
Pin Name
DQ0-DQ7 Inputs (programming)/Outputs
A0 - A14 Address Inputs
Pin Name
please visit our web site at
GND
V
V
G\
E\
CC
PP
DQ1
PIN ASSIGNMENT
DQ0
A7
A6
A5
A4
A3
A2
A1
A0
NC
A6
A5
A4
A3
A2
A1
A0
GND
DQ0
DQ1
DQ2
10
11
12
13
A12
V
5
6
7
8
9
A7
A6
A5
A4
A3
A2
A1
A0
32-Pin LCC (ECA)
Chip Enable/Power Down
Output Enable
Ground
5V Supply
13V Programming Power Supply
PP
(450 x 550 mils)
(Top View)
28-Pin DIP (J)
14 15 16 17 18 19 20
1
2
3
4
5
6
7
8
9
10
11
12
13
14
4 3 2 1 32 31 30
(600 MIL)
UVEPROM
UVEPROM
UVEPROM
UVEPROM
UVEPROM
Function
Function
28
27
26
25
24
23
22
21
20
19
18
17
16
15
Vcc
A14
A13
A8
A9
A11
G\
A10
E\
DQ7
DQ6
DQ5
DQ4
DQ3
AS27C256
29
28
27
26
25
24
23
22
21
A8
A9
A11
NC
G\
A10
E\
DQ7
DQ6
WE
A13
A8
A9
A11
OE
A10
CE1
DQ8
\
\
\

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as27c256 Summary of contents

Page 1

... Military Temp (- +125 C) XT AS27C256 Rev. 2.0 7/06 I For more products and information Austin Semiconductor, Inc. reserves the right to change products or specifications without notice. 1 UVEPROM UVEPROM UVEPROM UVEPROM UVEPROM AS27C256 PIN ASSIGNMENT (Top View) 28-Pin DIP (J) (600 MIL Vcc A12 A14 27 ...

Page 2

... Austin Semiconductor, Inc. GENERAL DESCRIPTION The AS27C256 series is a set of 262,144 bit, ultraviolet-light erasable, electrically programmable read-only These devices are fabricated using power-saving CMOS tech- nology for high speed and simple interface with MOS and bipo- lar circuits. All inputs (including program data inputs) can be driven by Series 54 TTL circuits without the use of external pullup resistors ...

Page 3

... Austin Semiconductor, Inc. OPERATION The seven modes of operation for the AS27C256 are listed in Table 1. The read mode requires a single 5V supply. All inputs are TTL level except for V for signature mode. FUNCTION OUTPUT (PINS) READ DISABLE ...

Page 4

... Austin Semiconductor, Inc. READ/OUTPUT DISABLE When the outputs of two or more AS27C256 are connected in parallel on the same bus, the output of any particular device in the circuit can be read with no interference from the ing outputs of the other devices. To read the output of the selected AS27C256, a low-level signal is applied to E\ and G\. ...

Page 5

... Program One 100us Pulse Increment YES NO Program FAIL Verify Byte? Pass Last NO Address? Yes VCC = VPP = 5.25V READ Verify FAIL Bytes? Pass Device Passed Austin Semiconductor, Inc. reserves the right to change products or specifications without notice. 5 UVEPROM UVEPROM UVEPROM UVEPROM UVEPROM AS27C256 Device Failed ...

Page 6

... 5.5V, E\= 5.5V, E\= E\= =5. minimum, outputs cycle open Austin Semiconductor, Inc. reserves the right to change products or specifications without notice. 6 UVEPROM UVEPROM UVEPROM UVEPROM UVEPROM AS27C256 TYP MAX 5 5.5 6.25 6.5 V -0.6 CC 12. +. +.6 CC 0.8 0.2 12 12.5 +125 . The deivce must not be inserted into ...

Page 7

... CONDITIONS see Figure 2 3 MIN MAX UNIT 0 130 ns 150 ns Austin Semiconductor, Inc. reserves the right to change products or specifications without notice. 7 UVEPROM UVEPROM UVEPROM UVEPROM UVEPROM AS27C256 MAX UNIT -12 -15 UNIT MIN MAX MIN MAX 120 150 ns 120 150 ns 40 ...

Page 8

... Figure 2) A 2.08V R = 800Ω L Output Under Test 100 pF Austin Semiconductor, Inc. reserves the right to change products or specifications without notice. 8 UVEPROM UVEPROM UVEPROM UVEPROM UVEPROM AS27C256 = 6.5 and MIN TYP MAX UNIT 0 µs 2 µs 95 100 105 µs 2 µ ...

Page 9

... Austin Semiconductor, Inc. FIGURE 4. PROGRAM-CYCLE TIMING (FLASHRITE PULSE PROGRAMMING) AS27C256 Rev. 2.0 7/06 FIGURE 3. READ-CYCLE TIMING Austin Semiconductor, Inc. reserves the right to change products or specifications without notice. 9 UVEPROM UVEPROM UVEPROM UVEPROM UVEPROM AS27C256 ...

Page 10

... D --- 1.490 E 0.500 0.610 eA 0.600 BSC e 0.100 BSC L 0.125 0.200 Q 0.015 0.060 S1 0.005 --- S2 0.005 --- Austin Semiconductor, Inc. reserves the right to change products or specifications without notice. 10 UVEPROM UVEPROM UVEPROM UVEPROM UVEPROM AS27C256 ...

Page 11

... D 0.442 D1 0.300 BSC E 0.540 E1 0.400 BSC e 0.050 BSC L 0.045 L1 0.075 Austin Semiconductor, Inc. reserves the right to change products or specifications without notice. 11 UVEPROM UVEPROM UVEPROM UVEPROM UVEPROM AS27C256 See Detail A L MAX 0.120 0.028 0.022 0.458 0.560 0.055 0.095 ...

Page 12

... Austin Semiconductor, Inc. EXAMPLE: AS27C256-30JM/MIL Device Number Speed AS27C256 -55 AS27C256 -70 AS27C256 -90 AS27C256 -12 AS27C256 -15 AS27C256 -17 AS27C256 -20 AS27C256 -25 AS27C256 -30 EXAMPLE: AS27C256-15ECAM Device Number Speed AS27C256 -55 AS27C256 -70 AS27C256 -90 AS27C256 -12 AS27C256 -15 AS27C256 -17 AS27C256 -20 AS27C256 -25 AS27C256 -30 *PROCESS / OPERATING TEMPERATURE M = Full Military Processing Per MIL-PRF-3835, Class Industrial Temperature Range ...

Page 13

... ASI PN SPEED AS27C256 -20ECA 200ns AS27C256 -20ECA 200ns AS27C256 -25ECA 250ns AS27C256 -25ECA 250ns AS27C256 -30ECA 300ns AS27C256 -30ECA 300ns AS27C256 -17ECA 170ns AS27C256 -17ECA 170ns AS27C256 -15ECA 150ns AS27C256 -15ECA 150ns AS27C256 -12ECA 120ns AS27C256 -12ECA 120ns AS27C256 -90ECA 90ns ...

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