CYPRESS CY7C1370D-167AXI
- 18Mbit NoBL™ pipelined synchronous SRAM — 512K × 36 or 1M × 18 dual organization
- 167MHz clock, 3.4ns pipelined read access, simultaneous independent read and write port operation
- NoBL™ (No Bus Latency) architecture: back-to-back read/write cycles with zero dead cycles between operations
- 100-pin TQFP, industrial temperature −40°C to +85°C, 3.3V supply (3.0V to 3.6V)
- Obsolete lifecycle — finite remaining stock; verified lot inventory available at Sparkle Electronics
Cypress Semiconductor (now Infineon Technologies) developed the NoBL™ (No Bus Latency) pipelined SRAM architecture to address the throughput bottleneck imposed by conventional synchronous SRAM designs when transitioning between read and write operations. Standard synchronous SRAMs require dead cycles — idle bus cycles — when switching between reads and writes, reducing effective memory bandwidth in alternating access patterns that are characteristic of networking packet forwarding, radar signal processing, and defense DSP pipeline designs. The NoBL™ architecture eliminates these dead cycles entirely by providing separate, independent read and write ports that operate simultaneously without bus turnaround penalty. The CY7C1370D-167AXI is available from stock at Sparkle Electronics, a specialized distributor serving embedded systems engineers, defense electronics procurement teams, and networking equipment OEMs requiring reliable access to high-performance SRAM with verified sourcing and same-day response on RFQs and pricing inquiries.
The CY7C1370D-167AXI carries an obsolete lifecycle designation — Infineon has discontinued production, and the global supply of this part is finite and actively depleting as production programs and repair depots continue to consume available inventory. The AXI ordering suffix designates the 100-pin TQFP package in industrial temperature grade (−40°C to +85°C) in tube packaging — a through-hole-compatible flat package format suited to both established board designs and mixed-technology assemblies. At 167MHz with 3.4ns pipelined read latency and 18Mbit (512K × 36) capacity, the CY7C1370D-167AXI was a reference specification for high-throughput networking and defense signal processing applications, and remains irreplaceable in programs that designed to its interface architecture. For radar and electronic warfare systems, aerospace and defense embedded computing platforms, and high-performance networking equipment with open production schedules, securing verified stock is an immediate procurement priority. Contact Sparkle Electronics to confirm current inventory and initiate an RFQ.
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NoBL™ Architecture and the Obsolescence Procurement Imperative
Two procurement realities define the CY7C1370D-167AXI in today’s market: its NoBL™ architecture made it a performance reference for networking and defense signal processing designs that could not tolerate the dead cycles of conventional synchronous SRAM — and its obsolete lifecycle status means that the supply window for securing verified stock is closing. Programs that specified the CY7C1370D-167AXI for its architectural advantages now face a procurement environment where spot market availability is declining, counterfeit exposure in unverified channels is rising, and no pin-compatible replacement exists from any current production source. Procurement engineers sourcing CY7C1370D-167AXI in stock, Cypress NoBL SRAM 18Mbit 167MHz, CY7C1370D-167AXI last-time buy, or CY7C1370D-167AXI obsolete stock distributor will find Sparkle Electronics maintains verified lot inventory with full traceability documentation. Submit an inquiry immediately to confirm current quantity and pricing before stock position changes.
What NoBL™ Architecture Delivers That Conventional SRAM Cannot
In a conventional pipelined synchronous SRAM, switching from a read burst to a write burst — or vice versa — requires one or more dead cycles on the data bus to allow the bus drivers to change direction. In a 167MHz system, each dead cycle represents a 6ns throughput gap. In networking packet forwarding engines and radar signal processors where read-write alternating patterns are the dominant access mode, these dead cycles accumulate into a measurable bandwidth reduction that limits system throughput below the theoretical memory bandwidth ceiling.
The NoBL™ architecture addresses this with a structural solution: separate dedicated read and write data buses that operate independently and simultaneously. The processor can issue a write operation on the write port during the same clock cycle that a read result is being returned on the read port — zero dead cycles, zero bus turnaround penalty. The effective memory bandwidth of a 167MHz NoBL™ SRAM in alternating read-write patterns equals that of a significantly faster conventional SRAM, making the CY7C1370D-167AXI’s 167MHz rating deliver higher real-world throughput than the clock frequency alone implies.
CY7C1370D-167AXI vs. Related NoBL™ SRAM Variants
| Parameter | CY7C1370D-167AXI | CY7C1370D-167AXC | CY7C1372D-167AXI |
|---|---|---|---|
| Availability | In Stock at Sparkle | Confirm with Sparkle | Confirm with Sparkle |
| Lifecycle | Obsolete | Obsolete | Obsolete |
| Capacity | 18Mbit | 18Mbit | 18Mbit |
| Organization | 512K × 36 / 1M × 18 | 512K × 36 / 1M × 18 | 512K × 36 / 1M × 18 |
| Clock Frequency | 167MHz | 167MHz | 167MHz |
| Read Latency | 3.4ns | 3.4ns | 3.4ns |
| Package | 100-pin TQFP | 100-pin TQFP | 100-pin TQFP |
| Temperature | −40°C to +85°C | 0°C to +70°C | −40°C to +85°C |
| Supply Voltage | 3.3V | 3.3V | 3.3V |
| Packaging | Tube | Commercial | Tube |
The AXI suffix designates industrial temperature grade (−40°C to +85°C) in tube packaging — the correct specification for embedded industrial and defense applications operating outside the commercial 0°C to +70°C boundary. The AXC suffix designates commercial temperature grade. The CY7C1372D is a related NoBL™ device with different internal pipeline configuration — confirm datasheet compatibility before substitution. All variants carry obsolete lifecycle status; stock across all suffix variants is finite.
For broader memory and storage procurement across defense and industrial programs, Sparkle Electronics maintains inventory spanning active and obsolete SRAM, dual-port SRAM, and non-volatile memory categories. Active lifecycle dual-port SRAM alternatives for new designs include the CYPRESS CY7C0851AV-133BBI — 2Mbit synchronous dual-port SRAM at 133MHz with active lifecycle status in the FBGA package.
Frequently Asked Questions
What does CY7C1370D-167AXI decode to?
CY7C = Cypress SRAM product family prefix; 1370 = NoBL™ pipelined synchronous SRAM, 18Mbit density; D = D-generation silicon revision with updated NoBL™ architecture; -167 = 167MHz clock frequency rating; A = TQFP package type; X = RoHS/lead-free compliant; I = industrial temperature grade (−40°C to +85°C); tube packaging.
Where can I buy CY7C1370D-167AXI in stock?
Sparkle Electronics maintains verified stock of the CY7C1370D-167AXI. Given the obsolete lifecycle status and actively depleting global supply, procurement teams with ongoing production or sustainment requirements should submit an RFQ immediately to confirm current quantity and pricing. Contact our team — same-day response on pricing, available quantity, lot documentation, and lead time.
What is the NoBL™ architecture and why does it matter for procurement?
NoBL™ (No Bus Latency) is a Cypress SRAM architecture that provides separate simultaneous read and write ports, eliminating the bus turnaround dead cycles required by conventional synchronous SRAM when switching between read and write operations. Designs that specified the CY7C1370D specifically for its NoBL™ interface — including networking ASICs, FPGAs, and DSP devices with dedicated separate read/write bus pins — cannot directly substitute a conventional synchronous SRAM without hardware redesign. This interface dependency is the primary reason why obsolete NoBL™ SRAMs cannot be easily cross-referenced to current production alternatives.
What replacement or cross-reference options exist for CY7C1370D-167AXI?
No current production device provides a direct pin-compatible NoBL™ replacement for the CY7C1370D-167AXI. IDT (Renesas) produced NoBL™-compatible devices under their QuadBus architecture, but these also carry obsolete or end-of-life status. For programs evaluating hardware redesign to accommodate a conventional synchronous SRAM or DDR SRAM, a full interface and timing analysis is required before substitution. Sparkle Electronics can provide cross-reference support and sourcing assistance for both direct obsolete stock procurement and alternative component evaluation. Contact our team with your specific design constraints.
What documentation is available for CY7C1370D-167AXI procurement?
Sparkle Electronics provides packing documentation, lot traceability, and country of origin certification for CY7C1370D-167AXI procurement. For programs where counterfeit risk mitigation is a procurement requirement — particularly relevant for obsolete components with known open-market counterfeit exposure — our team can advise on available lot history and inspection options before order placement. Submit documentation requirements at inquiry stage. Contact us to confirm scope.
Is CY7C1370D-167AXI suitable for defense applications?
The CY7C1370D-167AXI is an industrial-grade commercial device (−40°C to +85°C) without MIL-SPEC screening or QPL qualification. It is applicable to defense embedded computing and signal processing programs operating within the −40°C to +85°C temperature envelope where MIL-STD-883 screened SRAM is not contractually required. For programs specifying MIL-SPEC screened memory components, screened SRAM alternatives should be evaluated — contact Sparkle Electronics for sourcing guidance on qualified memory alternatives for your specific program requirements. Contact us to discuss your program’s memory qualification requirements.
Sourcing CY7C1370D-167AXI for a production program before verified stock is exhausted? Sparkle Electronics maintains confirmed inventory of obsolete and hard-to-find Cypress NoBL™ SRAM with full lot traceability and same-day RFQ response. Submit an inquiry now — pricing, quantity, and documentation scope confirmed within 24 hours.
