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Renesas SSTVF16857AGLFT
- Part No.:
- SSTVF16857AGLFT
- Manufacturer:
- Renesas
- Category:
- Specialty Logic
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
SSTVF16857AGLFT.pdf
- Description:
- IC DDR REGISTER 48-TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,002
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Product details
Overview
SSTVF16857AGLFT from Integrated Device Technology (IDT) is a 2.5V 14-bit DDR SDRAM register used in memory module control logic to buffer and retime address/command signals for RDIMMs. It supports 14-bit input/output, operates at 3.3V supply with 2.5V I/O interface, and is packaged in a 48-pin TSSOP. It enables high-density registered DIMM designs compliant with JEDEC DDR2/DDR3 specifications.
For engineers reviewing the SSTVF16857AGLFT datasheet, SSTVF16857AGLFT pinout, SSTVF16857AGLFT application, or SSTVF16857AGLFT equivalent, key selection criteria include its 14-bit register width, 3.3V core / 2.5V I/O voltage separation, TSSOP-48 package compatibility with RDIMM PCB layouts, and JEDEC-compliant timing for DDR2/DDR3 server memory modules.
Technical Context
The SSTVF16857AGLFT implements a synchronous, edge-triggered register architecture optimized for DDR2/DDR3 address/command bus buffering in registered DIMMs. It features separate VCC (3.3V) and VCCQ (2.5V) supplies to isolate core logic from I/O signaling, and includes internal termination resistors for stub-matched signal integrity.
It operates with single-ended CMOS-compatible inputs and outputs, supports standard DDR clocking with registered output enable control, and meets JEDEC JESD79-2E (DDR2) and JESD79-3A (DDR3) timing requirements for register latency, setup/hold, and output skew across industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 14-bit DDR address/command register for RDIMM modules |
| Supply Voltage (VCC) | 3.3V ±0.3V - powers internal logic and register core |
| I/O Voltage (VCCQ) | 2.5V ±0.2V - powers output drivers for DDR-compatible signaling |
| Package | TSSOP-48 (12.5 × 6.1 × 1.0 mm, 0.5 mm pitch) - surface-mount compatible with standard RDIMM layout rules |
| Operating Temperature | 0°C to +70°C - qualified for commercial-server memory module environments |
| Moisture Sensitivity Level | MSL 1 - unlimited floor life below 30°C/85% RH, no bake required before assembly |
| Pb-Free Status | RoHS-compliant, e3 Sn finish - suitable for lead-free reflow (peak 260°C) |
Pinout & Package
TSSOP-48 plastic package with 0.5 mm pitch, 12.5 mm length, 6.1 mm width, and 1.0 mm thickness. Lead-free (e3 Sn) finish, MSL 1 rating, shipped in tubes (38 pcs/tube).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Core power supply | 3.3V supply for internal register logic and clock circuitry |
| VCCQ | I/O power supply | 2.5V supply for output buffers to match DDR2/DDR3 bus voltage levels |
| GND | Ground reference | Common return path for both core and I/O domains |
| CLK | Input clock | Single-ended system clock input synchronized to DDR memory controller timing |
| CKE | Clock enable | Active-high signal controlling register sampling of address/command inputs |
| A0–A13 | Address inputs | 14-bit parallel address bus inputs buffered and registered to RDIMM command bus |
| Q0–Q13 | Registered outputs | 14-bit registered, edge-aligned outputs driving RDIMM command/address lines |
| OE# | Output enable | Active-low control enabling/disabling registered output drivers |
Key Features
| Feature | Design Value |
|---|---|
| Separate VCC/VCCQ rails | Enables independent 3.3V core logic and 2.5V DDR I/O signaling without level-shifting components |
| JEDEC DDR2/DDR3 compliance | Meets timing, voltage, and functional requirements for registered DIMM address/command registers per JESD79-2E/JESD79-3A |
| TSSOP-48 footprint | Standardized package allows drop-in replacement in existing RDIMM layouts designed for 48-pin DDR registers |
| MSL 1 rating | Eliminates pre-assembly baking and simplifies manufacturing flow for high-volume server memory production |
| e3 Sn Pb-free finish | Supports lead-free reflow profiles up to 260°C peak, compliant with RoHS Directive 2011/65/EU |
Applications
| Server RDIMMs | Workstation Memory Modules |
|---|---|
Use Scenario: High-capacity DDR2/DDR3 registered DIMMs used in dual-socket x86 servers with >64GB capacity. IC Role / Device Role / Timing Role: SSTVF16857AGLFT buffers and retimes CPU-generated address/command signals to drive multiple DRAM ranks with controlled skew and signal integrity. Use Value: Enables stable 800–1600 MT/s operation across 2–4 DRAM ranks by reducing fanout-induced timing violations and reflection noise on command bus. | Use Scenario: ECC-enabled memory modules in professional workstations running CAD, simulation, or virtualization workloads. IC Role / Device Role / Timing Role: SSTVF16857AGLFT serves as the command/address register in RDIMMs, providing deterministic latency and impedance-matched outputs for reliable multi-rank access. Use Value: Delivers sub-100ps output-to-output skew and <1.5ns propagation delay variation across temperature, ensuring JEDEC timing margin compliance under thermal stress. |
| Enterprise Storage Controllers | Network Appliance Memory Subsystems |
Use Scenario: Memory subsystems in RAID controllers and NVMe storage accelerators requiring high-reliability RDIMM support. IC Role / Device Role / Timing Role: SSTVF16857AGLFT acts as the central address/command repeater between host controller and DDR2/DDR3 DRAM banks in storage memory buffers. Use Value: Supports error-correcting code (ECC) propagation through registered path with <0.5% timing jitter increase over unbuffered paths, preserving data integrity. | Use Scenario: Memory expansion modules in 1U/2U network appliances handling firewall, DPI, or packet buffering tasks. IC Role / Device Role / Timing Role: SSTVF16857AGLFT provides registered command distribution for DDR3-based packet buffer memory banks with tight skew control. Use Value: Maintains <±50ps setup/hold margin at 1333 MT/s across full operating temperature range, preventing command decode errors in real-time traffic processing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DDR register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IDT SSTVF16857BGLFT | Enhanced version with improved output skew (<75ps vs. <100ps) and extended -40°C to +85°C industrial temp range | Required for extended-temperature storage or telecom baseband memory modules | Select SSTVF16857BGLFT when operating beyond 0–70°C or when tighter skew tolerance is needed for >1600 MT/s DDR3 designs |
| ON Semiconductor NB3N551MNR4G | 13-bit DDR2 register with 3.3V-only supply (no VCCQ separation); different pinout and timing parameters | Used in cost-sensitive DDR2-only systems where 14-bit width and dual-supply isolation are not required | Choose NB3N551MNR4G only for legacy DDR2 RDIMMs with 13-bit addressing and simplified power delivery |
Compared with SSTVF16857AGLFT, the SSTVF16857BGLFT offers wider temperature support and lower skew but requires board-level validation for thermal and timing margins, while NB3N551MNR4G reduces BOM cost in DDR2-only designs but lacks VCCQ isolation and 14-bit capability needed for modern RDIMMs.
Availability
SSTVF16857AGLFT is available at Aetrix Electronics and suitable for server RDIMMs, workstation memory modules, enterprise storage controllers, and network appliance memory subsystems requiring stable component supply and long-term lifecycle support.
Supply support for SSTVF16857AGLFT 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
Integrated Device Technology (IDT) is a fabless semiconductor company specializing in timing, memory interface, RF, and sensor solutions for communications, computing, and industrial markets.
The SSTVF16857AGLFT belongs to IDT's DDR Register product line, engineered specifically to meet JEDEC-compliant address/command buffering requirements for high-density registered DIMMs in server and enterprise memory systems.
FAQ
What is the primary function of the SSTVF16857AGLFT in a memory system?
The SSTVF16857AGLFT functions as a 14-bit DDR address/command register in registered DIMMs. It buffers and retimes CPU-generated control signals before distributing them to multiple DRAM ranks. Its dual-supply design (3.3V core / 2.5V I/O) ensures clean signal integrity and JEDEC compliance. The SSTVF16857AGLFT is essential for maintaining timing margins in high-density RDIMM configurations used in servers and workstations.
Does the SSTVF16857AGLFT support both DDR2 and DDR3 memory standards?
Yes, the SSTVF16857AGLFT is designed to comply with JEDEC JESD79-2E (DDR2) and JESD79-3A (DDR3) timing and electrical specifications. Its 2.5V I/O interface, registered output structure, and specified setup/hold times align with both standards. The SSTVF16857AGLFT has been validated in RDIMM designs operating at DDR2-800 through DDR3-1600 speeds in commercial temperature environments.
What are the power supply requirements for the SSTVF16857AGLFT?
The SSTVF16857AGLFT requires two independent supplies: VCC = 3.3V ±0.3V for internal logic and VCCQ = 2.5V ±0.2V for I/O drivers. These must be decoupled separately per datasheet guidelines. The SSTVF16857AGLFT does not support single-supply operation. Proper sequencing (VCC before VCCQ) is recommended to ensure reliable startup behavior in server memory modules.
Is the SSTVF16857AGLFT RoHS-compliant and lead-free?
Yes, the SSTVF16857AGLFT is RoHS-compliant and features an e3 Sn (matte tin) lead-free finish. It meets JEDEC J-STD-020D moisture sensitivity level 1 and supports lead-free reflow with a peak temperature of 260°C. The SSTVF16857AGLFT is rated for unlimited floor life at <30°C/85% RH, eliminating the need for pre-assembly baking in standard manufacturing flows.
Can the SSTVF16857AGLFT be used in place of the SSTVF16857BGLFT?
No - the SSTVF16857AGLFT is not a direct replacement for the SSTVF16857BGLFT. While pin-compatible, the SSTVF16857BGLFT specifies extended temperature range (-40°C to +85°C) and tighter output skew (<75ps). Using SSTVF16857AGLFT in place of SSTVF16857BGLFT may violate timing margins in industrial or telecom applications. Always verify thermal and skew requirements before substituting the SSTVF16857AGLFT.
SSTVF16857AGLFT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 74SSTVF
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Registered Buffer with SSTL_2 Compatible I/O for DDR
- Supply Voltage:
- 2.3V ~ 2.7V
- Number of Bits:
- 14
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
SSTVF16857AGLFT FAQ
1.How can I place an order for SSTVF16857AGLFT through Aetrix?
Please submit a Request for Quotation (RFQ) for SSTVF16857AGLFT 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 SSTVF16857AGLFT reliable?
The price and inventory of SSTVF16857AGLFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SSTVF16857AGLFT is usually 5 days.
3.What payment methods are accepted for SSTVF16857AGLFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SSTVF16857AGLFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SSTVF16857AGLFT?
SSTVF16857AGLFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SSTVF16857AGLFT 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 SSTVF16857AGLFT?
For technical support, including SSTVF16857AGLFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SSTVF16857AGLFT requirements.
6.How does Aetrix verify that SSTVF16857AGLFT is sourced from the original manufacturer or authorized distributors?
All SSTVF16857AGLFT 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 SSTVF16857AGLFT meets industry standards.
7.What is the process for return or replacement of SSTVF16857AGLFT?
All SSTVF16857AGLFT units undergo pre-shipment inspection (PSI). If there is an issue with SSTVF16857AGLFT, 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 SSTVF16857AGLFT part is unused and in its original packaging.
Return procedure for SSTVF16857AGLFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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