smj27c256 Austin Semiconductor, Inc., smj27c256 Datasheet
smj27c256
Manufacturer Part Number
smj27c256
Description
256k Uveprom Semiconductor
Manufacturer
Austin Semiconductor, Inc.
Datasheet
1.SMJ27C256.pdf
(11 pages)
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TI
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TI
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AVAILABLE AS MILITARY
• SMD 5962-86063
• MIL-STD-883
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 SNAP! Pulse Programming
• 3-state output buffers
• 400-mV DC assured noise immunity with standarad
TTL loads
• Latchup immunity of 250 mA on all input and output
pins
• Low power dissipation (CMOS Input Levels)
OPTIONS
• Timing
• Package(s)
• Operating Temperature Ranges
256K UVEPROM
UV Erasable Programmable
Read-Only Memory
SPECIFICATIONS
2Active - 165mW Worst Case
2Standby - 1.7mW Worst Case (CMOS-input levels)
150ns access
170ns access
200ns access
250ns access
300ns access
Ceramic DIP (600mils)
Military (-55
For more products and information
www.austinsemiconductor.com
please visit our web site at
o
C to +125
o
C)
MARKING
-15
-17
-20
-25
-30
J
M
No. 110
GENERAL DESCRIPTION
light erasable, electrically programmable read-only
memories. These devices are fabricated using power-saving
CMOS technology for high speed and simple interface with
MOS and bipolar circuits. All inputs (including program data
inputs) can be driven by Series 54 TTL circuits without the
use of external pullup resistors. Each output can drive one
Series 54 TTL circuit without external resistors. The data
outputs are 3-state for connecting multiple devices to a
common bus. The SMJ27C256 is pin-compatible with
28-pin 256K ROMs and EPROMs. It is offered in a 600mil
dual-in-line ceramic pagackage (J suffix) rated for operation
from -55°C to 125°C.
the read mode), it is ideal for use in microprocessor-based
systems. One other supply (13V) is needed for programming.
All programming signals are TTL level. This device is
programmable by the SNAP! Pulse programming algorithm.
The SNAP! Pulse programming algorithm uses a V
and a V
seconds. For programming outside the system, existing
EPROM programmers can be used. Locations can be
programmed singly, in blocks, or at random.
Because this EPROM operates from a single 5V supply (in
The SMJ27C256 series is a set of 262,144 bit, ultraviolet-
CC
Pin Name
of 6.5V for a nominal programming time of four
DA0-DQ7 Inputs (programming)/Outputs
A0 - A14 Address Inputs
GND
V
V
G\
E\
CC
PP
PIN ASSIGNMENT
GND
DQ0
DQ1
DQ2
A12
Chip Enable/Power Down
Output Enable
Ground
5V Supply
13V Programming Power Supply
V
A7
A6
A5
A4
A3
A2
A1
A0
32-Pin DIP (J)
PP
(Top View)
(600 MIL)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
UVEPROM
Function
28
27
26
25
24
23
22
21
20
19
18
17
16
15
SMJ27C256
Vcc
A14
A13
A8
A9
A11
G\
A10
E\
DQ7
DQ6
DQ5
DQ4
DQ3
PP
of 13V
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