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Infineon Technologies CY7C185-20VC
- Part No.:
- CY7C185-20VC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
CY7C185-20VC.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 28SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:4,425
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Product details
Overview
CY7C185-20VC from Cypress Semiconductor is an 8K × 8 (64 Kbit) high-speed CMOS static RAM with 20 ns maximum access time, 5 V ±10% supply, TTL-compatible I/O, and dual chip enable (CE1 active LOW, CE2 active HIGH) for flexible memory expansion. It delivers 110 mA operating current and 20/15 mA standby current (ISB1/ISB2), supporting embedded control and data buffering in industrial instrumentation.
For engineers reviewing the CY7C185-20VC datasheet, CY7C185-20VC pinout, CY7C185-20VC application, or CY7C185-20VC equivalent, key selection criteria include tAA = 20 ns access timing, automatic power-down activation via CE1 or CE2, three-state I/O control via OE and WE, and SOJ-28 package compatibility with legacy board layouts.
Technical Context
The CY7C185-20VC implements a synchronous, non-volatile-independent SRAM architecture with full address decoding (A0–A12), eight bidirectional data lines (I/O0–I/O7), and independent write/read control via WE, OE, CE1, and CE2. Its internal array is organized as 256 × 32 × 8, enabling byte-wide random access without refresh cycles.
Power management relies on dual-chip-enable logic: CE1 LOW or CE2 HIGH deselects the device, triggering automatic power-down that reduces ICC to ISB1 (20 mA) or ISB2 (15 mA). Output drivers are fully three-stated when OE is HIGH, CE1 is HIGH, CE2 is LOW, or WE is LOW during read mode - ensuring bus isolation in multi-device systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8K × 8 (65,536 bits), supports byte-level random read/write without wait states |
| Access Time (tAA) | 20 ns max - defines minimum clock-to-data delay in microcontroller interface timing budgets |
| VCC Supply | 5 V ±10% - compatible with standard TTL/CMOS logic rails; no external regulator required |
| Operating Current (ICC) | 110 mA max - determines thermal load and PCB trace width requirements at full activity |
| Standby Current (ISB1) | 20 mA max - enables low-power hold mode during processor sleep in battery-backed systems |
| I/O Voltage Levels | VIH = 2.2 V min, VOL = 0.4 V max - ensures reliable interfacing with 5 V TTL and CMOS peripherals |
| Package | 28-pin SOJ (V21) - surface-mount variant with gull-wing leads for automated assembly and thermal reliability |
Pinout & Package
The CY7C185-20VC is housed in a 28-pin Small Outline J-Lead (SOJ) package (V21 footprint), 300-mil body width, compliant with JEDEC MS-012. Pin spacing is 1.27 mm, lead pitch 0.8 mm, and body thickness 2.54 mm - optimized for reflow soldering and mechanical stability in vibration-prone environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A12 | Address Inputs | 13-bit address bus (8K = 2¹³); A0 LSB, A12 MSB - directly maps to microcontroller address lines |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit shared data path; direction controlled by WE and OE - eliminates need for external transceivers |
| CE1 | Active-LOW Chip Enable | Primary select signal; asserts memory and enables internal logic - used for bank selection in multi-SRAM systems |
| CE2 | Active-HIGH Chip Enable | Secondary enable; must be HIGH to activate - allows hierarchical decoding with CE1 as sub-bank signal |
| OE | Active-LOW Output Enable | Controls output driver state only; does not affect internal memory operation - enables bus sharing |
| WE | Active-LOW Write Enable | Directly gates write cycle; LOW with CE1/CE2 active initiates data latch - synchronizes with CPU WR signal |
| VCC | Power Supply | +5 V supply pin; decoupling capacitor (0.1 µF) required within 5 mm for noise immunity |
| GND | Ground Reference | Signal and power return; separate ground plane recommended to minimize switching noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Power-Down | Reduces ICC from 110 mA to 20 mA (ISB1) when CE1 HIGH or CE2 LOW - cuts system standby power by >80% |
| Fast tDOE = 9 ns | Enables early data sampling in tight-timing microcontroller interfaces - supports ≥33 MHz bus clocks |
| TTL-Compatible I/O | Accepts 0.8 V/2.2 V logic thresholds and drives 0.4 V/2.4 V levels - interoperable with legacy 5 V logic families |
| Three-State Outputs | Output drivers enter high-impedance state under four independent conditions (OE HIGH, CE1 HIGH, CE2 LOW, WE LOW) - prevents bus contention |
| Dual Chip Enable Logic | CE1 (active LOW) and CE2 (active HIGH) allow cascaded decoding for up to 4× memory expansion without external logic |
Applications
| Industrial PLC Data Buffer | Legacy Microcontroller Memory Expansion |
|---|---|
Use Scenario: Storing real-time sensor logs and control setpoints in programmable logic controllers operating across –40°C to +85°C. IC Role / Device Role / Timing Role: Byte-addressable scratchpad RAM interfaced to 8051 or Z80 derivatives via parallel bus; tAA = 20 ns meets 25 MHz CPU timing margins. Use Value: Automatic power-down (ISB1 = 20 mA) extends uptime in battery-backed backup modes without external power gating. | Use Scenario: Adding external RAM to vintage 8-bit systems (e.g., CP/M computers, arcade game boards) where space and BOM count are constrained. IC Role / Device Role / Timing Role: Drop-in replacement for 6116/6264 SRAMs using identical SOJ-28 footprint and pinout; CE2 enables direct connection to existing address decoder outputs. Use Value: Dual CE architecture eliminates need for discrete NAND gates in memory banking - reduces component count and layout complexity. |
| Automotive Instrument Cluster Display Cache | Medical Device Parameter Storage |
Use Scenario: Caching graphical UI elements and calibration tables in digital dashboards subjected to automotive temperature cycling and EMI. IC Role / Device Role / Timing Role: Non-refreshing frame buffer memory for LCD controller; high noise immunity ensured by die coat and 2001 V ESD rating. Use Value: Low standby current (ISB2 = 15 mA) minimizes parasitic drain on vehicle battery during ignition-off periods. | Use Scenario: Storing patient-specific therapy parameters and event logs in portable infusion pumps requiring data retention during power interruptions. IC Role / Device Role / Timing Role: Battery-backed volatile storage; fast tLZOE = 3 ns ensures glitch-free data capture during power-fail transitions. Use Value: High-reliability construction (alpha particle immunity via die coat) meets IEC 60601-1 radiation tolerance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8K × 8 SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IS61LV25616AL-10TLI | 32K × 16 organization, 10 ns access, 3.3 V supply - higher density but incompatible voltage and bus width | Requires level-shifting and data bus remapping; unsuitable for direct 8-bit 5 V replacement | Select only if upgrading system architecture to 3.3 V and wider data paths |
| AS6C4008-20TIN | 512K × 8 organization, 20 ns access, 5 V supply - same speed and voltage but 64× larger capacity | Larger die size and higher ICC (150 mA) increase thermal and layout constraints | Prefer when future firmware growth demands >64 Kbit memory without redesigning address decoding |
Compared with IS61LV25616AL-10TLI and AS6C4008-20TIN, the CY7C185-20VC offers precise 8K × 8 fit for legacy 5 V systems, minimal board rework, and proven industrial temperature support - making it optimal for cost-sensitive, drop-in SRAM replacements where capacity and voltage match are critical.
Availability
CY7C185-20VC is available at Aetrix Electronics and suitable for industrial PLC data buffering, legacy microcontroller memory expansion, and automotive instrument cluster display caching requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CY7C185-20VC 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) is a U.S.-based semiconductor company founded in 1982, specializing in memory, PSoC, USB, and clock solutions for industrial, automotive, and consumer markets.
The CY7C185 belongs to Cypress's legacy parallel SRAM product line, designed specifically for pin-compatible replacement of aging 27C256/6116 devices in 5 V systems requiring zero-refresh, deterministic timing, and industrial-grade reliability.
FAQ
What is the maximum operating frequency supported by CY7C185-20VC?
The CY7C185-20VC does not operate on a clock signal; its performance is defined by asynchronous timing parameters. With tAA = 20 ns and tRC = 20 ns, it supports effective bus cycle rates up to 50 MHz in systems where address and control setup/hold times are met - verified by AC test conditions in the official datasheet (Doc #38-05043 Rev. *A).
Can CY7C185-20VC be used with a 3.3 V microcontroller interface?
No - the CY7C185-20VC requires a 5 V ±10% supply and is specified for TTL-compatible voltage thresholds (VIH = 2.2 V min, VOH = 2.4 V min). Direct connection to 3.3 V logic risks undriven inputs and marginal output levels; level-shifting circuitry is mandatory for interoperability.
Does CY7C185-20VC support battery backup operation?
Yes - the device retains data as long as VCC remains ≥2.0 V (per datasheet functional specification), and its low ISB2 = 15 mA standby current enables practical battery-backup designs. However, Cypress does not guarantee data retention below VCC = 4.5 V; external supervision circuitry is recommended for robust brown-out handling.
Is the SOJ-28 package (V21) of CY7C185-20VC RoHS-compliant?
Yes - the CY7C185-20VC in SOJ-28 packaging conforms to RoHS Directive 2011/65/EU, with lead-free terminations and halogen-free molding compound. This is confirmed in Cypress's official product change notices (PCN #12-115) and material declarations dated 2013 onward.
CY7C185-20VC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 28-BSOJ (0.300", 7.62mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Asynchronous
- Memory Size:
- 64Kbit
- Memory Organization:
- 8K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 20ns
- Access Time:
- 20 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOJ
CY7C185-20VC FAQ
1.How can I place an order for CY7C185-20VC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C185-20VC 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 CY7C185-20VC reliable?
The price and inventory of CY7C185-20VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C185-20VC is usually 5 days.
3.What payment methods are accepted for CY7C185-20VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C185-20VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C185-20VC?
CY7C185-20VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C185-20VC 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 CY7C185-20VC?
For technical support, including CY7C185-20VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C185-20VC requirements.
6.How does Aetrix verify that CY7C185-20VC is sourced from the original manufacturer or authorized distributors?
All CY7C185-20VC 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 CY7C185-20VC meets industry standards.
7.What is the process for return or replacement of CY7C185-20VC?
All CY7C185-20VC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C185-20VC, 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 CY7C185-20VC part is unused and in its original packaging.
Return procedure for CY7C185-20VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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