My Inquiry
My Account
Infineon Technologies CY7C136A-55NXI
- Part No.:
- CY7C136A-55NXI
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 52-BQFP
- Datasheet:
-
CY7C136A-55NXI.pdf
- Description:
- IC SRAM 16KBIT PARALLEL 52PQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,461
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CY7C136A-55NXI from Cypress Semiconductor is a 2K × 8 true dual-port static RAM with independent left/right ports, 55 ns maximum access time, 5 V ±10% supply, and industrial temperature range (–40 °C to +85 °C). It supports simultaneous reads of the same memory location, features BUSY arbitration logic and INT flags for port-to-port communication, and is used in multiprocessor interconnect buffers and DSP cache subsystems.
For engineers reviewing the CY7C136A-55NXI datasheet, CY7C136A-55NXI pinout, CY7C136A-55NXI application, or CY7C136A-55NXI equivalent, key selection criteria include dual-port arbitration timing (tBLA = 20 ns, tBHA = 20 ns), standby current (ISB1 = 35 mA), open-drain BUSY output requiring pull-up, and compatibility with CY7C142/CY7C146 slave devices for 16-bit expansion.
Technical Context
The CY7C136A-55NXI implements fully asynchronous dual-port operation with independent CE, R/W, and OE controls per port. Its arbitration logic resolves contention via open-drain BUSY outputs that assert when both ports access the same address - requiring external pull-up resistors per datasheet Note 2.
It includes dedicated INT pins on both ports (7FF/7FE interrupt locations) for inter-port signaling, and supports automatic power-down per port via CE assertion. The device uses 0.65 µm CMOS process and is functionally identical to CY7C136 but qualified for industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 2K × 8 (2048 words × 8 bits); provides 16 KB total storage with true dual-port access |
| Access Time (tRC) | 55 ns max; defines minimum cycle time between successive read operations on same port |
| VCC Supply | 5 V ±10%; requires stable 4.5–5.5 V rail; not compatible with 3.3 V systems without level translation |
| Operating Temperature | –40 °C to +85 °C; qualified for industrial environments including motor control and PLC applications |
| ICC Operating Current | 110 mA max at fMAX; determines thermal budget and power supply sizing for continuous active use |
| ISB1 Standby Current | 35 mA max (both ports disabled); critical for low-power modes in battery-backed or energy-sensitive systems |
| BUSY Output Type | Open-drain; mandates external pull-up resistor (typically 4.7 kΩ) to VCC for proper logic-level assertion |
Pinout & Package
Package: 52-pin PQFP (Plastic Quad Flat Pack), 10 mm × 10 mm body, 0.65 mm pitch, lead-free (RoHS compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 48) | Power supply input | 5 V ±10% main supply; decoupling capacitor (0.1 µF ceramic) required adjacent to pin |
| GND (Pin 24) | Ground reference | Common return path for all I/O and core logic; must be low-impedance plane |
| A0L–A10L (Pins 1–11) | Left port address inputs | 11-bit address bus for left port; accesses 2K locations (000h–7FFh) |
| A0R–A10R (Pins 39–49) | Right port address inputs | 11-bit address bus for right port; independent addressing enables concurrent access |
| I/O0L–I/O7L (Pins 12–19) | Left port bidirectional data | 8-bit data bus; high-impedance when OE_L = HIGH or CE_L = HIGH |
| I/O0R–I/O7R (Pins 30–37) | Right port bidirectional data | 8-bit data bus; electrically isolated from left port I/O lines |
| CEL, CER (Pins 20, 38) | Chip enable (active LOW) | Per-port power-down control; asserting HIGH disables port and reduces ICC to ISB levels |
| R/WL, R/WR (Pins 21, 31) | Read/write control (active HIGH = read) | Asynchronous mode: HIGH = read, LOW = write; no internal latching |
| OEL, OER (Pins 22, 32) | Output enable (active LOW) | Controls tri-state of respective I/O bus; independent of CE and R/W states |
| BUSYL, BUSYR (Pins 23, 33) | Arbitration status flag (open drain) | LOW indicates port contention on shared address; requires external pull-up to VCC |
| INTL, INTR (Pins 25, 35) | Interrupt request (open drain) | Asserts when data written to 7FFh (left) or 7FEh (right); used for inter-port handshaking |
Key Features
| Feature | Design Value |
|---|---|
| True dual-port architecture | Enables simultaneous, independent read/write access to any memory location by two controllers without arbitration overhead |
| Automatic per-port power-down | Reduces ICC to ISB1 (35 mA) or ISB2 (75 mA) by disabling CE on idle port - critical for asymmetric workload systems |
| Hardware BUSY arbitration | Prevents data corruption during address collisions via open-drain BUSY signals with deterministic timing (tBLA = 20 ns) |
| Dedicated INT handshake | Eliminates polling: INTL/INTR assert on fixed addresses (7FFh/7FEh) to signal completion or event between ports |
| Master-slave expandability | Supports 16-bit+ data buses using CY7C142/CY7C146 slaves via BUSY chaining - no external glue logic required |
Applications
| DSP Cache Buffer | Multiprocessor Shared Memory |
|---|---|
|
Use Scenario: High-speed data exchange between TMS320C6000 DSP and ARM host processor in real-time audio processing. IC Role / Device Role / Timing Role: Dual-port SRAM acts as zero-wait-state shared buffer; left port serves DSP, right port serves ARM, with BUSY managing concurrent access to FFT coefficient tables. Use Value: Eliminates software semaphore overhead; 55 ns access enables sustained 18.2 MB/s throughput per port without pipeline stalls. |
Use Scenario: Inter-processor communication in redundant PLC controller pair performing safety-critical motion control. IC Role / Device Role / Timing Role: Acts as synchronized message queue; INTL/INTR signals trigger context switches when new motion commands arrive at 7FFh/7FEh. Use Value: Hardware-interrupt handshake ensures sub-100 ns latency for command propagation, meeting SIL-2 response time requirements. |
| Bit-Slice Processor Interconnect | Industrial Ethernet Bridge Buffer |
|
Use Scenario: Data aggregation across four 4-bit ALUs in a custom bit-slice CPU design for legacy CNC machine retrofit. IC Role / Device Role / Timing Role: Serves as unified register file extension; each ALU accesses distinct 512-word segments via A10L/A10R bank select. Use Value: Enables full 2K × 8 word space visible to all ALUs without address decoding logic, reducing gate count by ~120 LUTs. |
Use Scenario: Packet buffering between 100BASE-TX PHY and real-time EtherCAT master stack in embedded gateway. IC Role / Device Role / Timing Role: Provides non-blocking store-and-forward buffer; left port handles MAC-layer RX, right port feeds EtherCAT state machine. Use Value: 55 ns access allows full 100 Mbps line-rate packet forwarding with <1.2 µs latency jitter, preserving real-time determinism. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C136-55NXI | Identical functionality and pinout; rated only for commercial temperature (0 °C to +70 °C) | Not suitable for industrial environments where ambient exceeds 70 °C | Select only if operating temperature remains within commercial range and cost sensitivity outweighs reliability margin |
| CY7C142-55NXI | Slave-only dual-port SRAM; lacks BUSY output (BUSY input only) and INT pins; no standalone operation | Requires master (e.g., CY7C136A) to drive BUSY; usable only in 16-bit expansion configurations | Choose solely for width-expansion roles where CY7C136A drives arbitration and CY7C142 adds second byte lane |
Compared with CY7C136-55NXI, the -55NXI variant adds industrial temperature qualification and identical timing - making it the sole choice for ruggedized systems. Versus CY7C142-55NXI, it provides full master capability with autonomous arbitration and interrupt signaling, eliminating dependency on external coordination logic.
Availability
CY7C136A-55NXI is available at Aetrix Electronics and suitable for industrial automation, real-time DSP subsystems, and multiprocessor interconnects requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CY7C136A-55NXI 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-performance memory and programmable solutions for industrial, automotive, and communications markets.
CY7C136A belongs to Cypress's legacy dual-port SRAM product line, engineered specifically for deterministic, low-latency shared memory in multiprocessor and digital signal processing architectures.
FAQ
Is CY7C136A-55NXI pin-compatible with CY7C136-55NXI?
Yes - CY7C136A-55NXI is functionally and physically identical to CY7C136-55NXI per datasheet Note 1, sharing the same 52-pin PQFP package, pinout, and electrical characteristics. The 'A' suffix denotes industrial temperature qualification (–40 °C to +85 °C), while the base CY7C136-55NXI is commercial-grade (0 °C to +70 °C). No layout changes are needed for migration.
What external components are required for BUSY and INT pins?
BUSYL, BUSYR, INTL, and INTR are open-drain outputs requiring external pull-up resistors to VCC. Cypress specifies 4.7 kΩ as typical; values between 2.2 kΩ and 10 kΩ maintain noise immunity and rise time within timing limits (tBHA ≤ 30 ns). No capacitors or series termination are needed unless board trace length exceeds 15 cm.
Can CY7C136A-55NXI operate with a 3.3 V supply?
No - CY7C136A-55NXI is specified only for 5 V ±10% (4.5–5.5 V) operation. Applying 3.3 V violates Absolute Maximum Ratings and results in undefined behavior, including failure to meet 55 ns access time, incorrect BUSY assertion, or data retention loss. Level-shifting circuitry is mandatory for interfacing with 3.3 V controllers.
How does the automatic power-down feature reduce system power?
When CE_L or CE_R is driven HIGH, the corresponding port enters standby mode, reducing its ICC contribution from 110 mA (active) to 35 mA (both ports standby) or 75 mA (one port active). This per-port control allows dynamic power gating - e.g., disabling the ARM port during DSP-only computation - cutting total supply current by up to 68% in asymmetric workloads.
CY7C136A-55NXI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 52-BQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 16Kbit
- Memory Organization:
- 2K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 55ns
- Access Time:
- 55 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 52-PQFP (10x10)
CY7C136A-55NXI FAQ
1.How can I place an order for CY7C136A-55NXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C136A-55NXI 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 CY7C136A-55NXI reliable?
The price and inventory of CY7C136A-55NXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C136A-55NXI is usually 5 days.
3.What payment methods are accepted for CY7C136A-55NXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C136A-55NXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C136A-55NXI?
CY7C136A-55NXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C136A-55NXI 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 CY7C136A-55NXI?
For technical support, including CY7C136A-55NXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C136A-55NXI requirements.
6.How does Aetrix verify that CY7C136A-55NXI is sourced from the original manufacturer or authorized distributors?
All CY7C136A-55NXI 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 CY7C136A-55NXI meets industry standards.
7.What is the process for return or replacement of CY7C136A-55NXI?
All CY7C136A-55NXI units undergo pre-shipment inspection (PSI). If there is an issue with CY7C136A-55NXI, 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 CY7C136A-55NXI part is unused and in its original packaging.
Return procedure for CY7C136A-55NXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY7C136A-55NXI 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
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…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
