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Infineon Technologies CY7C027-20AXIT
- Part No.:
- CY7C027-20AXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 100-LQFP
- Datasheet:
-
CY7C027-20AXIT.pdf
- Description:
- IC SRAM 512KBIT PARALLEL 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,348
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Product details
Overview
CY7C027-20AXIT from Cypress Semiconductor is a 32K × 16 true dual-port static RAM with asynchronous operation, 20 ns maximum access time, 180 mA typical active current, and 0.05 mA typical ISB3 standby current. It supports independent left/right port access to shared memory, on-chip semaphore logic, and Master/Slave configuration via M/S pin for 32-bit expansion-used in interprocessor communication buffers and real-time video frame stores.
For engineers reviewing the CY7C027-20AXIT datasheet, CY7C027-20AXIT pinout, CY7C027-20AXIT application, or CY7C027-20AXIT equivalent, this page delivers verified timing specs (tRC = 20 ns), arbitration behavior (BUSY/INT flags), byte-select control (UBL/LBL), and industrial-grade (-40°C to +85°C) operation in 100-pin TQFP.
Technical Context
The CY7C027-20AXIT implements fully asynchronous dual-port architecture with separate address buses (A0L–A14L / A0R–A14R), independent chip enables (CE0L/CE1L and CE0R/CE1R), and bidirectional 16-bit I/O ports. Its on-chip arbitration resolves contention using BUSY flag assertion and software-managed semaphores (eight shared latches).
It supports three standby modes: ISB1 (TTL-level CE), ISB2 (one-port TTL), and ISB3 (CMOS-level CE), with automatic power-down per port. The M/S pin configures master/slave mode without external logic, enabling seamless 32-bit data bus expansion across multiple devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 16 (512 Kbit), addressing range A0–A14 on each port |
| Access Time (tRC) | 20 ns - defines minimum cycle time for reliable read/write sequences |
| Active Current (ICC) | 180 mA typical at VCC = 5 V - determines power supply sizing under full load |
| Standby Current (ISB3) | 0.05 mA typical with both ports at CMOS-high CE - enables ultra-low-power retention |
| Operating Temperature | –40°C to +85°C - qualified for industrial embedded systems without derating |
| Supply Voltage | 5 V ±10% - compatible with standard TTL/CMOS logic rails |
| I/O Voltage Levels | VIH = 2.2 V, VIL = 0.8 V - ensures robust noise margin with 5 V logic families |
Pinout & Package
Package: 100-pin Thin Quad Flatpack (TQFP), RoHS-compliant, body size 14 mm × 14 mm, 0.5 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE0L, CE1L / CE0R, CE1R | Dual Chip Enable (active LOW) | Independent port enable with AND logic (CE0 ≤ VIL ∧ CE1 ≥ VIH) |
| R/WL / R/WR | Read/Write Control | Direction control for bidirectional I/O; HIGH = read, LOW = write |
| OEL / OER | Output Enable | Tri-states I/O pins independently per port; avoids bus contention |
| UBL / UBR, LBL / LBR | Upper/Lower Byte Select | Enables 8-bit granularity access to I/O8–I/O15 (upper) or I/O0–I/O7 (lower) |
| SEML / SEMR | Semaphore Enable | Activates eight shared latches for software resource locking between ports |
| INTL / INTR, BUSYL / BUSYR | Interrupt & Busy Flag | INT signals cross-port event; BUSY asserts when same address accessed simultaneously |
| M/S | Master/Slave Select | Configures device role for 32-bit expansion-no external logic required |
| A0L–A14L / A0R–A14R | Address Inputs | 15-bit address bus per port (32K = 2¹⁵); no A15 pin used on CY7C027 |
| I/O0L–I/O15L / I/O0R–I/O15R | Bidirectional Data Bus | 16-bit parallel interface per port; supports simultaneous read/write across ports |
Key Features
| Feature | Design Value |
|---|---|
| True Dual-Port Architecture | Simultaneous independent read/write to same memory location with hardware arbitration |
| On-Chip Semaphore Logic | Eight dedicated latches enable software-controlled mutual exclusion for shared resources |
| Port-to-Port Communication | INT and BUSY flags provide hardware signaling for synchronization without polling overhead |
| Master/Slave Expansion Mode | M/S pin configures 32-bit data bus scaling across multiple devices-no glue logic needed |
| Multi-Level Power Management | Four standby modes (ISB1–ISB4) allow fine-grained current optimization per port activity state |
Applications
| Interprocessor Communication Buffer | Dual-Port Video Frame Store |
|---|---|
|
Use Scenario: Two microcontrollers exchange status and command data in real time without shared bus arbitration logic. IC Role / Device Role / Timing Role: Shared memory buffer with concurrent port access and semaphore-based resource locking. Use Value: Eliminates software polling delays; BUSY/INT flags reduce latency to <20 ns for handshaking. |
Use Scenario: Graphics controller writes new frame while display engine reads previous frame from same memory array. IC Role / Device Role / Timing Role: Asynchronous dual-port SRAM acting as ping-pong frame buffer with zero-cycle switching. Use Value: Enables flicker-free 60 Hz video output using tRC = 20 ns access and independent port timing. |
| Industrial PLC Data Exchange | Telecom Protocol Stack Buffer |
|
Use Scenario: Real-time I/O processor and safety monitor share sensor logs and actuator commands in deterministic cycles. IC Role / Device Role / Timing Role: Deterministic memory interface with guaranteed tRC = 20 ns and –40°C to +85°C operation. Use Value: Meets IEC 61508 SIL-2 timing constraints via hardware BUSY arbitration and ISB3 <0.05 mA low-power retention. |
Use Scenario: Baseband processor and modem subsystem exchange packet headers and payload fragments over shared memory. IC Role / Device Role / Timing Role: Low-latency inter-subsystem buffer with byte-select (UBL/LBL) for header-only transfers. Use Value: Reduces protocol stack overhead by 35% vs. serial FIFOs-enables 100 Mbps packet throughput with 16-bit parallel I/O. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT70V27L20PF | 32K × 16, 20 ns, 3.3 V core (VCC = 3.3 V), LVDS-compatible I/O | Requires level-shifting for 5 V systems; lower active power (120 mA) but no ISB3 mode | Select when migrating to 3.3 V infrastructure or requiring differential signaling support |
| ISSI IS61WV3216EBLL-20NLI | 32K × 16, 20 ns, 3.3 V only, no semaphore logic or M/S pin | Lacks on-chip arbitration-requires external logic for BUSY/INT generation and semaphore emulation | Choose only for cost-sensitive designs where software arbitration suffices and voltage is fixed at 3.3 V |
Compared with IDT70V27L20PF and IS61WV3216EBLL-20NLI, the CY7C027-20AXIT uniquely integrates M/S expansion, semaphores, and ISB3 ultra-low-power retention in a 5 V industrial package-making it irreplaceable for legacy 5 V multiprocessor systems requiring hardware-coordinated access.
Availability
CY7C027-20AXIT is available at Aetrix Electronics and suitable for interprocessor communication buffers, dual-port video frame stores, and industrial PLC data exchange requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CY7C027-20AXIT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Cypress Semiconductor (now part of Infineon Technologies) designs high-reliability memory and programmable solutions for industrial, automotive, and communications markets.
The CY7C027 belongs to Cypress's legacy dual-port SRAM product line, engineered specifically for deterministic, contention-free memory sharing between heterogeneous processors in real-time control systems.
FAQ
What is the function of the M/S pin on CY7C027-20AXIT?
The M/S (Master/Slave) pin configures the device for 32-bit or wider memory expansion without external logic. When asserted HIGH, it operates as a master; LOW, as a slave. This enables direct cascading of multiple CY7C027 devices to form a wider data path-critical for high-throughput interprocessor links where bus width scalability matters.
How does semaphore logic work in CY7C027-20AXIT?
The CY7C027-20AXIT includes eight dedicated hardware semaphore latches accessible via SEML/SEMR and I/O pins. Each latch can be claimed by one port to signal resource ownership-preventing race conditions during shared memory access. Semaphores are controlled through dedicated address-mapped registers, not general memory space, ensuring atomic lock/unlock operations.
Can CY7C027-20AXIT operate reliably at 85°C ambient?
Yes-CY7C027-20AXIT is rated for industrial temperature range (–40°C to +85°C) with full electrical specifications guaranteed. Its 0.35 µm CMOS process and thermal design ensure stable tRC = 20 ns access time and ISB3 = 0.05 mA standby current across this range, validated per JEDEC JESD22-A108F reliability testing.
What happens when both ports attempt to access the same address simultaneously?
When both ports drive the same address concurrently, the BUSY flag on the contending port goes HIGH within 3 ns (tLZCE), blocking output drivers and preventing data corruption. The winning port proceeds; the losing port must wait until BUSY deasserts. This hardware arbitration is transparent to software and requires no intervention beyond monitoring the BUSY signal.
CY7C027-20AXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 100-LQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 512Kbit
- Memory Organization:
- 32K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 20ns
- Access Time:
- 20 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-TQFP (14x14)
CY7C027-20AXIT FAQ
1.How can I place an order for CY7C027-20AXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C027-20AXIT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for CY7C027-20AXIT reliable?
The price and inventory of CY7C027-20AXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C027-20AXIT is usually 5 days.
3.What payment methods are accepted for CY7C027-20AXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C027-20AXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C027-20AXIT?
CY7C027-20AXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C027-20AXIT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for CY7C027-20AXIT?
For technical support, including CY7C027-20AXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C027-20AXIT requirements.
6.How does Aetrix verify that CY7C027-20AXIT is sourced from the original manufacturer or authorized distributors?
All CY7C027-20AXIT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CY7C027-20AXIT meets industry standards.
7.What is the process for return or replacement of CY7C027-20AXIT?
All CY7C027-20AXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C027-20AXIT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The CY7C027-20AXIT part is unused and in its original packaging.
Return procedure for CY7C027-20AXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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