SMJ27C512 Datasheet, PDF (1/11 Pages) Austin Semiconductor – UV Erasable Programmable Read-Only Memory

Austin Semiconductor, Inc.
UVEPROM
SMJ27C512
512K UVEPROM
UV Erasable Programmable
Read-Only Memory
AVAILABLE AS MILITARY
SPECIFICATIONS
• SMD 5962-87648
• MIL-STD-883
FEATURES
• Organized 65,536 x 8
• High-reliability MIL-PRF-38535 processing
• Single +5V ±10% power supply
• Pin-compatible with existing 512K read-only memories (ROMs)
and electrically programmable ROMs (EPROMs)
• All inputs/outputs fully TTL compatible
• Power-saving CMOS technology
• Very high-speed SNAP! Pulse Programming
• 3-state output buffers
• 400mV minimum DC noise immunity with standard TTL loads
• Latchup immunity of 250mA on all input and output lines
• Low power dissipation (CMOS input levels)
PActive - 193mW (MAX)
PStandby - 1.7mW (MAX)
PIN ASSIGNMENT
(Top View)
28-Pin DIP (J) 600-Mils
A15 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\/V_PP
21 A10
20 E\
19 DQ7
18 DQ6
17 DQ5
16 DQ4
15 _DQ3
Pin Name
Function
A0 - A15 Address Inputs
DA0-DQ7 Inputs (programming)/Outputs
E\ Chip Enable/Power Down
GND Ground
G\ /V_PP Output Enable/13V Programming
V_CC 5V Power Supply
OPTIONS
• Timing
150ns access
200ns access
250ns access
MARKING
-15
-20
-25
• Package(s)
Ceramic DIP (600mils)
J No. 110
• Operating Temperature Ranges
Military (-55^oC to +125^oC)
M
For more products and information
please visit our web site at
www.austinsemiconductor.com
SMJ27512
Rev. 1.0 9/01
GENERAL DESCRIPTION
The SMJ27C512 is a set of 65536 by 8-bit (524,288-bit),
ultraviolet (UV) 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 SMJ27C512 is
pin-compatible with existing 28-pin 512K ROMs and
EPROMs.
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 V_PP of 13V
and a V_CC of 6.5V for a nominal programming time of seven
seconds. For programming outside the system, existing
EPROM programmers can be used. Locations may be
programmed singly, in blocks, or at random.
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
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