AEROFLEX ACT-S512K32N-020P7EQ
- 512K x 32 high-density SRAM memory configuration
- 20ns maximum access time for fast data retrieval
- Radiation-hardened design for space applications
- Wide operating temperature range (-55°C to +125°C)
- Hermetic ceramic package for extreme environment protection
In demanding aerospace and defense applications, reliable high-speed memory is critical for processing radar data, managing electronic warfare systems, and supporting satellite operations. The AEROFLEX ACT-S512K32N-020P7EQ is a space-grade SRAM memory device designed to meet these rigorous requirements, providing high-density storage with fast access times in harsh operating environments.
This memory device features a radiation-hardened design that withstands the extreme conditions of space, including high levels of ionizing radiation and temperature fluctuations. Its hermetic ceramic package ensures protection against moisture and contamination, making it suitable for long-duration missions where component reliability is non-negotiable.
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The AEROFLEX ACT-S512K32N-020P7EQ is a 16Mbit (512K×32) CMOS SRAM Multichip Module with 20ns maximum access time, MIL-PRF-38534 compliant, in the 66-pin hermetic ceramic P7 PGA package (1.09″×1.09″×0.185″ with shoulder). It is the 20ns speed-grade variant of the same ACT-S512K32 family as the ACT-S512K32N-017P7EQ, sharing identical package, supply voltage, temperature range, die architecture, and DESC SMD# 5962-94611 qualification. The 20ns grade is specified when the target processor memory bus cycle allows slightly relaxed timing, often enabling improved power budget or availability on extended procurement lead times.
17ns vs. 20ns Speed Grade — When to Specify Each
| Parameter | ACT-S512K32N-017P7EQ | ACT-S512K32N-020P7EQ |
|---|---|---|
| Access Time | 17 ns | 20 ns |
| Package | P7 PGA, 1.09″×1.09″ | P7 PGA, 1.09″×1.09″ |
| Operating Temperature | −55°C to +125°C | −55°C to +125°C |
| Quality Level | MIL-PRF-38534 (Q) | MIL-PRF-38534 (Q) |
| DESC SMD | 5962-94611 | 5962-94611 |
| Supply Voltage | +5V (4.5–5.5V) | +5V (4.5–5.5V) |
| Typical Application | High-speed cache, radar DSP | Mass memory, data buffering |
| Pin-Compatible | Yes | Yes |
The 17ns grade is preferred for cache-tier memory interfacing high-speed radar DSPs and EW processor ASICs where every nanosecond of bus latency impacts throughput. The 20ns grade is appropriate for mass memory data buffering and store-and-forward applications where bus cycle time is not the binding constraint, and is often more readily available from stock for MRO and sustainment procurement. Both variants are pin-compatible in the P7 package, enabling speed-grade substitution without PCB redesign when vetted by the system integrator.
Supply Chain and Qualification
Both speed grades are manufactured in Aeroflex’s MIL-PRF-38534-certified facility (Cage Code 51863) and released under DESC SMD 5962-94611. The ACT-S512K32N-020P7EQ is stocked and supplied with full lot traceability, certificates of conformance, and AS6081-compliant anti-counterfeit inspection documentation. For satellite programs requiring SEE or TID radiation characterization, consult Aeroflex for RHA-designated lot availability in the 20ns grade.
FAQ
What is the only difference between ACT-S512K32N-020P7EQ and ACT-S512K32N-017P7EQ?
Access time: 20ns vs. 17ns. Package, pinout, temperature range, supply voltage, die architecture, MIL-PRF-38534 qualification, and DESC SMD number are identical.
Can the -020P7EQ substitute for the -017P7EQ on an existing PCB?
Yes — they are pin-compatible in the P7 PGA package. Whether the 20ns grade meets timing requirements depends on the processor memory bus cycle time. Verify with system timing analysis before substitution in a qualified program BOM.
Why would a procurement engineer specify 20ns over 17ns?
The 20ns grade is typically more available from distributor stock for MRO and sustainment orders. It also suits mass memory and data buffering applications where 17ns access time provides no additional system benefit, making the 20ns grade the more cost-effective and supply-chain-resilient choice for those use cases.
What does the EQ suffix mean?
E = extended military temperature grade (−55°C to +125°C); Q = MIL-PRF-38534 compliant MCM. Together EQ confirms the part is fully qualified for defense and space programs requiring military full-temperature screening.
Is DESC SMD 5962-94611 the same across all speed grades?
Yes. The DESC SMD 5962-94611 covers the entire ACT-S512K32N family across all speed grades (17–55ns) and package types (F1, F2, F18, P1, P7), providing a single qualified parts list entry that covers the full product family.
What documentation is available for defense program procurement?
Certificates of conformance, lot traveler records, date code documentation, and incoming inspection reports per AS6081. RHA lot documentation for satellite and space programs is available directly from Aeroflex upon request.
