SMJ27C256 データシートの表示（PDF） - Austin Semiconductor
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SMJ27C256 Datasheet PDF : 11 Pages
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Austin Semiconductor, Inc.
UVEPROM
SMJ27C256
256K UVEPROM
UV Erasable Programmable
Read-Only Memory
AVAILABLE AS MILITARY
SPECIFICATIONS
• 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)
PActive - 165mW Worst Case
PStandby - 1.7mW Worst Case (CMOS-input levels)
OPTIONS
• Timing
150ns access
170ns access
200ns access
250ns access
300ns access
MARKING
-15
-17
-20
-25
-30
• Package(s)
Ceramic DIP (600mils)
J
No. 110
• Operating Temperature Ranges
Military (-55oC to +125oC) M
For more products and information
please visit our web site at
www.austinsemiconductor.com
PIN ASSIGNMENT
(Top View)
32-Pin DIP (J)
(600 MIL)
VPP 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
Pin Name
Function
A0 - A14 Address Inputs
DA0-DQ7 Inputs (programming)/Outputs
E\ Chip Enable/Power Down
G\ Output Enable
GND Ground
VCC 5V Supply
VPP 13V Programming Power Supply
GENERAL DESCRIPTION
The SMJ27C256 series is a set of 262,144 bit, ultraviolet-
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.
Because this EPROM operates from a single 5V supply (in
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 VPP of 13V
and a VCC of 6.5V for a nominal programming time of four
seconds. For programming outside the system, existing
EPROM programmers can be used. Locations can be
programmed singly, in blocks, or at random.
SMJ27C256
Rev. 1.0 9/01
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
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