My Inquiry
My Account
Infineon Technologies CY7C185-15VC
- Part No.:
- CY7C185-15VC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
CY7C185-15VC.pdf
- Description:
- IC SRAM 64KBIT PARALLEL 28SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:3,954
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CY7C185-15VC from Cypress Semiconductor is an 8K × 8 (64 Kbit) high-speed CMOS static RAM with 15 ns access time, TTL-compatible I/O, dual chip enables (CE1 active-low, CE2 active-high), and automatic power-down reducing standby current to 15 mA. It operates at 5V ±10% over industrial temperature (–40°C to +85°C) and is packaged in a 28-pin molded SOJ for embedded memory expansion in legacy control systems.
For engineers reviewing the CY7C185-15VC datasheet, CY7C185-15VC pinout, CY7C185-15VC application, or CY7C185-15VC equivalent, key selection criteria include tAA = 15 ns read timing, ISB2 = 15 mA low-power deselected state, CE1/CE2/OE logic flexibility for banked memory decoding, and SOJ-28 mechanical compatibility with board-level space constraints.
Technical Context
The CY7C185-15VC implements a synchronous, non-volatile-independent SRAM array with full address decoding (A0–A12), bidirectional 8-bit data bus (I/O0–I/O7), and three-state output drivers controlled by OE. Its dual CE architecture allows hierarchical memory mapping without external gating logic.
Write operation requires simultaneous CE1 = LOW, CE2 = HIGH, and WE = LOW; read requires CE1 = LOW, CE2 = HIGH, OE = LOW, and WE = HIGH. Power-down activates when either CE1 ≥ VIH or CE2 ≤ VIL, dropping ICC from 130 mA to 15 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 8,192 × 8 bits - supports byte-wide data transfers without bit-slicing logic |
| Access Time (tAA) | 15 ns - enables direct interface with 66 MHz Z80/8086-class processors |
| Supply Voltage | 5.0 V ±10% - compatible with standard TTL/CMOS logic rails; no LDO required |
| Active Current (ICC) | 130 mA max - defines PCB trace width and local decoupling (≥10 µF ceramic + bulk) |
| Standby Current (ISB2) | 15 mA max - enables low-quiescent power in sleep-mode microcontroller systems |
| Input/Output Compatibility | TTL-level - eliminates level-shifter need when interfacing with 74LS/74HC peripherals |
| Operating Temperature | –40°C to +85°C - qualified for industrial automation and motor control environments |
Pinout & Package
Package: 28-pin molded SOJ (Small Outline J-Lead), 300-mil width, JEDEC MS-013AC compliant. Lead finish: matte tin, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A12 | Address Inputs | 13-bit address bus supporting full 8K-word decoding; no external address latching needed |
| I/O0–I/O7 | Bidirectional Data Bus | Three-state CMOS I/Os; high-impedance when CE1=HIGH, CE2=LOW, or OE=HIGH |
| CE1 | Active-Low Chip Enable | Primary selection signal; asserts internal power-up and enables outputs when LOW |
| CE2 | Active-High Chip Enable | Secondary enable; must be HIGH for any operation; enables bank-select logic sharing |
| OE | Active-Low Output Enable | Controls output driver state independently of CE; allows read-modify-write cycles |
| WE | Active-Low Write Enable | Directly gates write path; LOW with CE1/CE2 asserted initiates memory write |
| VCC | Power Supply | +5 V supply pin; requires local 0.1 µF ceramic decoupling adjacent to pin |
| GND | Ground Reference | Signal and power ground return; must connect to low-impedance plane |
Key Features
| Feature | Design Value |
|---|---|
| Fast tDOE = 8 ns | Minimizes read latency in burst-access microcontroller systems using OE-controlled page reads |
| Automatic power-down (70% reduction) | Drops ICC from 130 mA to 15 mA when deselected-critical for battery-backed real-time clocks |
| Three-state outputs with independent OE | Enables shared data bus architectures without external bus transceivers |
| Dual CE architecture (CE1/CE2) | Supports 2:1 memory banking with single gate logic-reduces FPGA I/O count in custom controllers |
| Die coat for alpha immunity | Prevents soft errors in high-reliability industrial settings near radiation sources |
Applications
| Industrial PLC Memory Buffer | Legacy Microprocessor System Cache |
|---|---|
Use Scenario: Stores I/O scan data between CPU polling cycles in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Byte-wide SRAM buffer holding 8K words of process image data; accessed via Z80 DMA bursts. Use Value: 15 ns tAA ensures zero-wait-state operation with 6 MHz Z80 CPU clock; SOJ package fits dense backplane layouts. |
Use Scenario: Serves as instruction/data cache for 8088-based embedded controllers in CNC motion systems. IC Role / Device Role / Timing Role: Non-volatile-independent fast memory mapped at 0x0000–0x1FFF; selected via 74LS138 decoder. Use Value: Dual CE inputs simplify multi-bank decode; tLZOE = 3 ns enables tight bus turnaround in 8-bit multiplexed buses. |
| Medical Instrument Data Logger | Avionics Sensor Interface Module |
Use Scenario: Captures analog-to-digital conversion results from ECG front-end ASICs during diagnostic mode. IC Role / Device Role / Timing Role: High-reliability SRAM buffer with die coat protection against cosmic-induced bit flips. Use Value: ISB2 = 15 mA extends battery life in portable defibrillators; industrial temp rating supports operating range. |
Use Scenario: Buffers discrete sensor status (fuel pressure, flap position) for ARINC 429 protocol translation. IC Role / Device Role / Timing Role: Glue logic SRAM interfaced to FPGA-based serial encoder; accessed via synchronous read strobes. Use Value: tHZOE = 7 ns guarantees clean bus release before next sensor poll cycle; SOJ lead form withstands thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8K×8 SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AS6C8008-15TIN | Lower ICC (100 mA) but higher tAA (15 ns same); no CE2 pin - single CE only | Requires redesign of CE logic; lacks hierarchical bank select capability | Select if board space permits SOIC-28 and CE2 functionality is unused |
| IS61LV5128-15KLI | 3.3 V supply only; 15 ns tAA; LVCMOS I/O - not TTL-compatible | Needs level shifters for 5 V systems; incompatible with legacy 5 V bus designs | Select only for new 3.3 V designs where voltage scaling justifies redesign cost |
Compared with AS6C8008-15TIN and IS61LV5128-15KLI, the CY7C185-15VC uniquely retains 5 V TTL compatibility, dual CE decoding, and industrial temperature support in a single SOJ-28 package-making it irreplaceable in field-upgraded legacy control hardware.
Availability
CY7C185-15VC is available at Aetrix Electronics and suitable for industrial PLC memory buffers, legacy microprocessor system caches, and medical instrument data loggers requiring stable component supply across extended product lifecycles.
Supply support for CY7C185-15VC 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 specializing in memory, PSoC, and USB solutions for industrial and automotive markets.
The CY7C185 belongs to Cypress's legacy parallel SRAM product line, designed specifically for drop-in replacement of bipolar and early CMOS SRAMs in 5 V industrial control and instrumentation systems.
FAQ
Is CY7C185-15VC pin-compatible with CY7C185-15PC?
Yes-both share identical 28-pin SOJ (CY7C185-15VC) and DIP (CY7C185-15PC) footprints with matching pin functions and electrical behavior. The only difference is package type and temperature grade: VC is industrial SOJ, PC is commercial DIP. Mechanical mounting and PCB layout are interchangeable at the footprint level.
Does CY7C185-15VC require external pull-up resistors on CE2 or OE?
No-CE2 and OE have TTL-compatible input thresholds (VIH = 2.2 V min, VIL = 0.8 V max) and do not require external pull-ups when driven directly by 5 V logic. Internal input load current is ±5 µA, so standard 74LS/74HC outputs drive them reliably without added components.
Can CY7C185-15VC operate at 4.5 V supply?
Yes-the device is specified for 5.0 V ±10%, meaning 4.5 V to 5.5 V operation is fully guaranteed per datasheet Electrical Characteristics. At 4.5 V, tAA remains 15 ns (min), and ISB2 stays at 15 mA max, ensuring full functionality across the entire voltage range.
What is the maximum capacitive load supported on I/O pins?
The CY7C185-15VC drives up to 30 pF load capacitance while maintaining specified tAA = 15 ns and tDOE = 8 ns, as verified in AC Test Loads (Figure 4a). Exceeding 30 pF increases propagation delay linearly-e.g., 60 pF adds ~12 ns to tAA-so keep trace lengths short and avoid daisy-chaining more than two devices per bus segment.
CY7C185-15VC 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:
- 15ns
- Access Time:
- 15 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
CY7C185-15VC FAQ
1.How can I place an order for CY7C185-15VC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C185-15VC 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 CY7C185-15VC reliable?
The price and inventory of CY7C185-15VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C185-15VC is usually 5 days.
3.What payment methods are accepted for CY7C185-15VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C185-15VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C185-15VC?
CY7C185-15VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C185-15VC 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 CY7C185-15VC?
For technical support, including CY7C185-15VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C185-15VC requirements.
6.How does Aetrix verify that CY7C185-15VC is sourced from the original manufacturer or authorized distributors?
All CY7C185-15VC 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 CY7C185-15VC meets industry standards.
7.What is the process for return or replacement of CY7C185-15VC?
All CY7C185-15VC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C185-15VC, 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 CY7C185-15VC part is unused and in its original packaging.
Return procedure for CY7C185-15VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY7C185-15VC Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
