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Renesas 7134LA20JI8
- Part No.:
- 7134LA20JI8
- Manufacturer:
- Renesas
- Category:
- Memory
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
7134LA20JI8.pdf
- Description:
- IC SRAM 32KBIT PARALLEL 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,475
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Product details
Overview
IDT7134LA20JI8 from Renesas Electronics is a high-speed 4K × 8 dual-port static RAM with independent left/right asynchronous ports, 20 ns read cycle time (max), 5 V ±10% single-supply operation, and industrial temperature range (–40°C to +85°C). It supports battery-backed data retention down to 2 V and is used in real-time digital signal processing systems requiring concurrent access without wait states.
For engineers reviewing the 7134LA20JI8 datasheet, 7134LA20JI8 pinout, 7134LA20JI8 application, or 7134LA20JI8 equivalent, key selection criteria include dual-port arbitration-free timing, sub-1 µA full-standby current (ISB3), TTL-compatible I/O, and PLCC-52 package compatibility with legacy military/industrial board layouts.
Technical Context
The 7134LA20JI8 implements fully asynchronous dual-port architecture with separate address, control, and bidirectional I/O buses per port-no on-chip arbitration logic required. Each port features independent chip enable (CEL/CER), output enable (OEL/OER), and read/write (R/WL/R/WR) controls, enabling external contention management.
It uses CMOS high-performance fabrication for low active power (700 mW typ.) and ultra-low standby modes: ISB3 = 0.2 mA (typ.) at CMOS-level CE inputs, and battery-retention mode (2 V, 100–4000 µA) exclusive to LA variants. Timing is defined by tRC = 20 ns (max), tAA = 20 ns (max), and tAOE = 15 ns (max) under commercial/industrial conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4K × 8 bits (32 Kbit); supports two independent 4K address spaces with shared memory array |
| Read Cycle Time | 20 ns (max); enables 50 MHz sustained read throughput per port without wait states |
| Supply Voltage | 5.0 V ±10%; operates across 4.5–5.5 V with TTL-compatible input thresholds (VIH ≥ 2.2 V) |
| Full Standby Current | 0.2 mA (typ.); achieved when both CEL and CER > VCC − 0.2 V and all inputs static - critical for low-power hold modes |
| Data Retention Voltage | 2.0 V (min.); LA-only feature allowing backup power operation with guaranteed data integrity |
| Operating Temperature | –40°C to +85°C; qualified for industrial-grade reliability with MIL-PRF-38535 QML compliance available in other variants |
| Package | 52-pin PLCC (PLG52); 0.75″ × 0.75″ footprint with gull-wing leads, RoHS-compliant green variant available |
Pinout & Package
7134LA20JI8 is housed in a 52-pin Plastic Leaded Chip Carrier (PLCC, package code PLG52), top-view orientation with pin 1 index corner marked. The package measures approximately 0.75 in × 0.75 in × 0.17 in and requires standard PLCC socket or reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0L–A11L | Left-port address inputs | 12-bit address bus for left-side memory access; must be stable before tAS prior to write |
| A0R–A11R | Right-port address inputs | Independent 12-bit address bus; allows simultaneous but non-conflicting addressing of same or different locations |
| I/O0L–I/O7L | Left-port bidirectional data | 8-bit TTL-compatible I/O; high-impedance when OEL = VIH or CEL = VIH |
| I/O0R–I/O7R | Right-port bidirectional data | Electrically isolated from left port; no internal bus contention unless externally synchronized |
| CEL, CER | Chip enable (left/right) | Active-low enables respective port's internal circuitry; drives ISB1/ISB2/ISB3/ISB4 current states |
| OEL, OER | Output enable (left/right) | Active-low enables output drivers; overrides R/W state for tri-state control during reads |
| R/WL, R/WR | Read/write control (left/right) | Active-low write command; high = read mode (outputs enabled if OE active) |
| VCC, GND | Power supply | All VCC pins must be decoupled locally; all GND pins tied to common ground plane for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Dual-port asynchronous access | Enables concurrent read/write from separate controllers (e.g., DSP + microcontroller) without arbitration logic or clock synchronization |
| Battery backup data retention | Operates at 2 V with ≤4 mA retention current - supports uninterruptible memory hold during main power loss |
| Ultra-low full-standby current | 0.2 mA typical (ISB3) when both ports disabled via CMOS-level CE - extends battery life in portable industrial equipment |
| TTL-compatible I/O | Direct interface with legacy 5 V logic families without level shifters; VIH = 2.2 V min., VOL = 0.4 V max. at 6 mA |
| MIL-PRF-38535 QML option | Available in military-grade variants (e.g., 7134LA35CB) for aerospace/defense applications requiring radiation-hardened screening |
Applications
| Real-Time Digital Signal Processing | Industrial Motion Control |
|---|---|
Use Scenario: Simultaneous acquisition and filtering in FPGA-DSP co-processing systems where one port feeds ADC samples and the other streams filtered results to DAC. IC Role / Device Role / Timing Role: Dual-port SRAM acts as zero-wait-state buffer between asynchronous clock domains, eliminating FIFO latency and pipeline stalls. Use Value: 20 ns tRC enables 50 MHz sample throughput per port, sustaining real-time 16-bit audio or motor encoder data rates without buffering bottlenecks. | Use Scenario: Coordinated servo axis control in CNC machines, where PLC writes position commands to one port while motion controller reads them and updates PWM outputs via second port. IC Role / Device Role / Timing Role: Shared memory hub enabling deterministic inter-processor communication without software polling or interrupt overhead. Use Value: Independent port timing (tAA = 20 ns) ensures command latency < 25 ns, meeting sub-100 µs jitter requirements for closed-loop servo cycles. |
| Avionics Data Logging | Telecom Line Card Buffering |
Use Scenario: Recording flight sensor telemetry in airborne black box systems using redundant power paths - main 5 V supply and backup 2 V battery. IC Role / Device Role / Timing Role: LA variant provides seamless transition to battery-retention mode during main power failure, preserving last valid sensor frame. Use Value: Guaranteed data retention at 2 V (VDR = 2.0 V) with ISB3 = 0.2 mA allows >100-hour hold time on small backup cells. | Use Scenario: Frame buffering in TDM-over-IP gateway line cards, where one port accepts incoming PCM streams and the other feeds packetized Ethernet output. IC Role / Device Role / Timing Role: Asynchronous dual-port eliminates need for clock domain crossing logic between telecom and packet-processing clocks. Use Value: tWDD = 40 ns (write pulse to data delay) and tDDD = 30 ns (write-to-read delay) ensure deterministic inter-port data forwarding within 70 ns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-port SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C1352BV-20AC | 20 ns access, 4K × 8, 3.3 V core (5 V tolerant I/O), 100-pin TQFP; lower active power (350 mW), no battery retention | Requires level translation for pure 5 V systems; suited for newer 3.3 V designs with tighter power budgets | Select when migrating to lower-voltage infrastructure and battery backup is unnecessary |
| AS7C34098B-20JC | 20 ns access, 4K × 8, 5 V, 48-pin SOJ; ISB = 5 µA (typ.), no data retention below 4.5 V | Limited to single-ended control; lacks true dual-port arbitration flexibility - requires external logic for port coordination | Choose for cost-sensitive, space-constrained applications where full dual-port independence is not required |
Compared with CY7C1352BV-20AC and AS7C34098B-20JC, the 7134LA20JI8 uniquely combines 5 V TTL compatibility, industrial temperature rating, battery-backed data retention, and true independent dual-port timing - making it irreplaceable in legacy avionics, motion control, and military systems where voltage stability and fail-safe memory hold are mandatory.
Availability
7134LA20JI8 is available at Aetrix Electronics and suitable for real-time digital signal processing, industrial motion control, and avionics data logging requiring stable component supply across extended product lifecycles.
Supply support for 7134LA20JI8 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
Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and memory solutions for automotive, industrial, and enterprise applications.
The IDT7134 family was originally developed by Integrated Device Technology (acquired by Renesas in 2019) to address deterministic, arbitration-free memory sharing in high-reliability embedded systems - particularly in radar, test equipment, and programmable logic controllers.
FAQ
What is the maximum operating temperature range for the 7134LA20JI8?
The 7134LA20JI8 is rated for industrial temperature operation from –40°C to +85°C. This range is confirmed in the "Recommended Operating Temperature and Supply Voltage" table and applies specifically to the JI8 suffix variant, which denotes industrial grade in the ordering information. The device maintains full 20 ns timing performance across this entire range when powered at 5.0 V ±10%.
Does the 7134LA20JI8 support true dual-port contention handling?
No - the 7134LA20JI8 does not include on-chip arbitration logic. It is designed for systems where external hardware or firmware manages port contention. When both ports simultaneously access the same memory location, data integrity is the user's responsibility. The datasheet explicitly states that "it is the user's responsibility to ensure data integrity" during such events, and recommends external arbitration or careful timing coordination.
Can the 7134LA20JI8 retain data at voltages below 5 V?
Yes - the 7134LA20JI8 (LA variant) supports data retention down to 2.0 V, as specified in Table 2720 tbl 07. This is a key differentiator from SA variants. At VCC = 2 V, the device draws ≤4000 µA (max) in retention mode (ICCDR), enabling battery backup operation. This capability is exclusive to LA-series parts and is not available in SA versions like 7134SA20JI8.
What package type does the 7134LA20JI8 use, and is it lead-free?
The 7134LA20JI8 uses a 52-pin Plastic Leaded Chip Carrier (PLCC), designated PLG52 in Renesas documentation. It is a green (RoHS-compliant) part, as confirmed in the "Features" section and "Ordering Information" table. Lead-finish (SnPb) versions are obsolete except for FP48, LC48, and SB48 packages - PLG52 is only available in lead-free form.
How does the 7134LA20JI8 achieve ultra-low standby current?
The 7134LA20JI8 achieves 0.2 mA typical full-standby current (ISB3) by disabling both ports' internal circuitry when CEL and CER are driven above VCC − 0.2 V (CMOS-high), and all inputs remain static (f = 0). This mode reduces dynamic switching and leakage, distinct from TTL-level standby (ISB1 = 25 mA typ.). The LA variant's optimized CMOS design enables this deep sleep state without requiring external power gating.
7134LA20JI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 52-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Dual Port, Asynchronous
- Memory Size:
- 32Kbit
- Memory Organization:
- 4K 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 52-PLCC (19.13x19.13)
7134LA20JI8 FAQ
1.How can I place an order for 7134LA20JI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 7134LA20JI8 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 7134LA20JI8 reliable?
The price and inventory of 7134LA20JI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7134LA20JI8 is usually 5 days.
3.What payment methods are accepted for 7134LA20JI8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7134LA20JI8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 7134LA20JI8?
7134LA20JI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 7134LA20JI8 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 7134LA20JI8?
For technical support, including 7134LA20JI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7134LA20JI8 requirements.
6.How does Aetrix verify that 7134LA20JI8 is sourced from the original manufacturer or authorized distributors?
All 7134LA20JI8 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 7134LA20JI8 meets industry standards.
7.What is the process for return or replacement of 7134LA20JI8?
All 7134LA20JI8 units undergo pre-shipment inspection (PSI). If there is an issue with 7134LA20JI8, 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 7134LA20JI8 part is unused and in its original packaging.
Return procedure for 7134LA20JI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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