CDCVF857ZQLR Equivalent & Substitute Parts

Part Overview

The CDCVF857ZQLR is a PLL Clock Driver IC manufactured by Texas Instruments, designed for high-speed clock distribution applications with a maximum frequency of 220MHz. This device features SSTL-2 input and output signaling, operates at 2.3V to 2.7V supply voltage, and is housed in a 56-VFBGA package. The product is currently classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new designs requiring similar clock distribution capabilities.

Key Parameters

Parameter	Value
Manufacturer Part Number	CDCVF857ZQLR
Manufacturer	Texas Instruments
Category	Clock/Timing
Description	IC PLL CLOCK DRIVER 56BGA
Type	PLL Clock Driver
Frequency - Max	220MHz
Input Signaling	SSTL-2
Output Signaling	SSTL-2
Voltage - Supply	2.3V ~ 2.7V
Operating Temperature	-40°C ~ 85°C
Package / Case	56-VFBGA
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the CDCVF857ZQLR is determined by the following critical parameters:

Frequency Capability: Maximum operating frequency must meet or exceed 220MHz
Supply Voltage Compatibility: Operating voltage range must encompass 2.3V to 2.7V
Output Signaling: SSTL-2 output is required for direct interface compatibility
Package Compatibility: 56-pin BGA package variants (VFBGA, TFBGA, CABGA) with equivalent pinout and footprint dimensions
Number of Circuits: Single circuit configuration
Compliance Standards: ROHS3 compliance and EAR99 classification maintained

The substitute part 95V2F857AHLFT from Renesas Electronics Corporation meets these substitution criteria with equivalent electrical performance and package compatibility.

Parameter Comparison

Parameter	CDCVF857ZQLR (Main Part)	95V2F857AHLFT (Substitute)
Manufacturer	Texas Instruments	Renesas Electronics Corporation
Category	Clock/Timing	Clock/Timing
Type	PLL Clock Driver	Memory DDR Clock Buffer/Driver
Frequency - Max	220MHz	233MHz
Input Signaling	SSTL-2	LVCMOS
Output Signaling	SSTL-2	SSTL-2
Voltage - Supply	2.3V ~ 2.7V	2.3V ~ 2.7V
Operating Temperature	-40°C ~ 85°C	0°C ~ 85°C
Package / Case	56-VFBGA	56-TFBGA
Supplier Device Package	56-BGA Microstar Junior (7x4.5)	56-CABGA (4.5x7.0)
Number of Circuits	1	1
Product Status	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)	1 (Unlimited)

Engineering Selection Recommendations

The 95V2F857AHLFT serves as a direct functional substitute for the obsolete CDCVF857ZQLR based on the following engineering criteria:

Electrical Compatibility: Both devices operate within the identical 2.3V to 2.7V supply voltage range. The substitute part exceeds the frequency requirement with 233MHz maximum capability versus the original 220MHz specification. SSTL-2 output signaling is maintained for seamless interface compatibility.

Package Compatibility: Both devices utilize 56-pin BGA packages with equivalent footprint dimensions (7x4.5mm and 4.5x7.0mm respectively), enabling direct PCB layout substitution without redesign.

Compliance and Availability: The substitute part maintains ROHS3 compliance and EAR99 classification consistent with the original device. Active product status ensures long-term availability and supply chain continuity, addressing the obsolescence of the original part.

Operational Considerations: The substitute part operates across a narrower temperature range (0°C to 85°C versus -40°C to 85°C). Applications requiring extended low-temperature operation below 0°C must retain the original part or implement thermal management strategies. The substitute part features superior moisture sensitivity characteristics (MSL 1 versus MSL 2), providing enhanced reliability in humid storage and operational environments.

Frequently Asked Questions (FAQ)

Q: Can the 95V2F857AHLFT directly replace the CDCVF857ZQLR without PCB modifications?

A: The 56-pin BGA packages are mechanically compatible with equivalent footprint dimensions. However, verify pinout compatibility with device datasheets before implementation, as input signaling differs (LVCMOS versus SSTL-2 input on the original).

Q: What is the primary difference in input signaling between these devices?

A: The CDCVF857ZQLR accepts SSTL-2 input signaling, while the 95V2F857AHLFT accepts LVCMOS input signaling. Both devices output SSTL-2 signals. Ensure your clock source provides the appropriate input signal type for the selected device.

Q: Is the substitute part suitable for applications requiring -40°C operation?

A: No. The 95V2F857AHLFT operates from 0°C to 85°C, making it unsuitable for applications requiring extended low-temperature operation below 0°C. Evaluate alternative substitutes or retain the original part for such applications.

Q: What is the significance of the different MSL ratings?

A: The substitute part carries MSL 1 (unlimited shelf life) compared to MSL 2 (1-year shelf life) for the original. This indicates superior moisture resistance and reduced risk of moisture-induced failures during storage and handling.

Q: Are both devices RoHS compliant?

A: Yes. Both the CDCVF857ZQLR and 95V2F857AHLFT are ROHS3 compliant and maintain EAR99 export classification.

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