Military & Space Products
32K x 8 STATIC RAM—Low Power SOI
HLX6256
FEATURES
RADIATION
OTHER
• Fabricated with RICMOS™ IV Silicon on Insulator (SOI)
0.55 µm Low Power Process
• Read/Write Cycle Times
≤ 17 ns (Typical)
≤ 25 ns (-55 to 125°C)
• Total Dose Hardness through 1x106 rad(SiO2)
• Neutron Hardness through 1x1014 cm-2
• Typical Operating Power <10 mW/MHz
• Asynchronous Operation
• Dynamic and Static Transient Upset Hardness
through 1x109 rad(Si)/s
• JEDEC Standard Low Voltage
CMOS Compatible I/O
• Dose Rate Survivability through 1x1011 rad(Si)/s
• Soft Error Rate of <1x10-10 upsets/bit-day
• Latchup Free
• Single 3.3 V 0.3V Power Supply
• Packaging Options
- 28-Lead Flat Pack (0.500 in. x 0.720 in.)
- 28-Lead DIP, MIL-STD-1835, CDIP2-T28
- 36-Lead Flat Pack (0.630 in. x 0.650 in.)
- Various Multi-Chip Module (MCM) Configurations
GENERAL DESCRIPTION
The 32K x 8 Radiation Hardened Static RAM is a high
performance 32,768 word x 8-bit static random access
memory with industry-standard functionality. It is fabri-
cated with Honeywell’s radiation hardened technology,
and is designed for use in low voltage systems operating in
radiation environments. The RAM operates over the full
military temperature range and requires only a single 3.3 V
0.3V power supply. The RAM is compatible with JEDEC
standard low voltage CMOS I/O. Power consumption is
typically less than 10 mW/MHz in operation, and less than
2 mW when de-selected. The RAM read operation is fully
asynchronous,withanassociatedtypicalaccesstimeof14
ns at 3.3 V.
Honeywell’senhancedSOIRICMOS™IV(RadiationInsen-
sitiveCMOS)technologyisradiationhardenedthroughthe
use of advanced and proprietary design, layout and pro-
cess hardening techniques. The RICMOS™ IV low power
process is a SIMOX CMOS technology with a 150 Å gate
oxideandaminimumdrawnfeaturesizeof0.7µm(0.55µm
effective gate length—Leff). Additional features include
tungsten via plugs, Honeywell’s proprietary SHARP pla-
narization process and a lightly doped drain (LDD) struc-
ture for improved short channel reliability. A 7 transistor
(7T) memory cell is used for superior single event upset
hardening, while three layer metal power bussing and the
low collection volume SIMOX substrate provide improved
dose rate hardening.