PCK3807ADB,112 Clock Fanout Buffer IC - Equivalent & Substitute Parts

Part Overview

The PCK3807ADB,112 is a Clock Fanout Buffer (Distribution) IC manufactured by NXP USA Inc., designed for 1:10 clock distribution at 400 MHz in a 20-SSOP package. This part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part operates across a supply voltage range of 2.3V to 3.6V with LVTTL input and output compatibility, suitable for applications requiring high-frequency clock distribution in industrial and commercial temperature ranges (-40°C to 85°C).

Key Parameters

Parameter	PCK3807ADB,112
Manufacturer	NXP USA Inc.
Product Type	Fanout Buffer (Distribution)
Ratio - Input:Output	1:10
Frequency - Max	400 MHz
Input Logic Level	LVCMOS, LVTTL
Output Logic Level	LVTTL
Voltage - Supply	2.3V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Package / Case	20-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the PCK3807ADB,112 are grouped based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

Ratio - Input:Output: 1:10 (mandatory match)
Package / Case: 20-SSOP or 20-QSOP (same footprint family)
Mounting Type: Surface Mount
Number of Circuits: 1
Differential Input/Output: No/No

Secondary Compatibility Factors:

Frequency - Max: Must equal or exceed 400 MHz for direct replacement; lower frequency parts (100 MHz, 166 MHz) are functional substitutes for applications not requiring full 400 MHz bandwidth
Voltage - Supply: Must overlap with 2.3V ~ 3.6V range
Operating Temperature: Must support -40°C ~ 85°C range
Logic Levels: Input/Output compatibility with LVTTL

The substitute parts listed below are organized by frequency capability and package variant, reflecting the available alternatives from Renesas Electronics Corporation (74FCT series).

Parameter Comparison

Parameter	PCK3807ADB,112	74FCT20807PYGI	74FCT20807PYGI8	74FCT20807QGI	74FCT20807QGI8	74FCT3807APYG	74FCT3807APYG8	74FCT3807APYGI	74FCT3807APYGI8	74FCT3807AQG	74FCT3807AQG8
Manufacturer	NXP USA Inc.	Renesas Electronics	Renesas Electronics	Renesas Electronics	Renesas Electronics	Renesas Electronics	Renesas Electronics	Renesas Electronics	Renesas Electronics	Renesas Electronics	Renesas Electronics
Ratio - Input:Output	1:10	1:10	1:10	1:10	1:10	1:10	1:10	1:10	1:10	1:10	1:10
Frequency - Max	400 MHz	166 MHz	166 MHz	166 MHz	166 MHz	100 MHz	100 MHz	100 MHz	100 MHz	100 MHz	100 MHz
Input Logic Level	LVCMOS, LVTTL	LVTTL	LVTTL	LVTTL	LVTTL	LVTTL	LVTTL	LVTTL	LVTTL	LVTTL	LVTTL
Output Logic Level	LVTTL	LVTTL	LVTTL	LVTTL	LVTTL	CMOS, TTL	CMOS, TTL	CMOS, TTL	CMOS, TTL	CMOS, TTL	CMOS, TTL
Voltage - Supply	2.3V ~ 3.6V	2.3V ~ 2.7V	2.3V ~ 2.7V	2.3V ~ 2.7V	2.3V ~ 2.7V	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C
Package / Case	20-SSOP (0.209", 5.30mm)	20-SSOP (0.209", 5.30mm)	20-SSOP (0.209", 5.30mm)	20-QSOP (0.154", 3.90mm)	20-QSOP (0.154", 3.90mm)	20-SSOP (0.209", 5.30mm)	20-SSOP (0.209", 5.30mm)	20-SSOP (0.209", 5.30mm)	20-SSOP (0.209", 5.30mm)	20-QSOP (0.154", 3.90mm)	20-QSOP (0.154", 3.90mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts are ROHS3 compliant and carry active product status from Renesas Electronics Corporation, ensuring long-term availability and manufacturing support compared to the obsolete PCK3807ADB,112.

For applications requiring 400 MHz operation: The PCK3807ADB,112 operates at 400 MHz maximum frequency. No direct frequency-equivalent substitute exists in the provided list. The 74FCT20807 series (166 MHz maximum) and 74FCT3807 series (100 MHz maximum) represent functional alternatives for applications operating below their respective frequency limits.

For package compatibility: Parts designated with PYGI/PYGI8 suffix maintain the 20-SSOP (0.209", 5.30mm Width) package footprint. Parts designated with QGI/QGI8 suffix use the 20-QSOP (0.154", 3.90mm Width) package, which is a narrower variant suitable for space-constrained layouts.

For temperature range: The 74FCT3807APYGI, 74FCT3807APYGI8, and 74FCT20807 series support the full -40°C to 85°C operating range matching the original part. The 74FCT3807APYG, 74FCT3807APYG8, 74FCT3807AQG, and 74FCT3807AQG8 variants operate only across 0°C to 70°C and are suitable for commercial temperature applications only.

For supply voltage: The 74FCT20807 series operates at 2.3V to 2.7V, overlapping the lower portion of the original part's 2.3V to 3.6V range. The 74FCT3807 series operates at 3V to 3.6V, covering the upper portion. System voltage requirements determine which series is appropriate.

Frequently Asked Questions (FAQ)

Q: Can the 74FCT20807PYGI8 directly replace the PCK3807ADB,112 in a 400 MHz application?

A: No. The 74FCT20807PYGI8 has a maximum frequency rating of 166 MHz, while the PCK3807ADB,112 operates at 400 MHz. This substitute is suitable only for applications operating at or below 166 MHz. Exceeding the rated frequency of a substitute part may result in signal integrity degradation or functional failure.

Q: What is the difference between 20-SSOP and 20-QSOP packages?

A: Both are 20-pin surface-mount packages with identical pin counts and compatible pinouts. The 20-SSOP (0.209", 5.30mm Width) is wider, while the 20-QSOP (0.154", 3.90mm Width) is narrower. PCB layout and available board space determine which package variant is appropriate. Parts with identical electrical specifications but different package codes (PYGI vs. QGI) are interchangeable only if the PCB footprint supports the specific package width.

Q: Are the 74FCT3807APYGI and 74FCT3807APYGI8 electrically identical?

A: Yes. Both parts are electrically identical with identical electrical specifications. The suffix "8" indicates Tape & Reel (TR) packaging, while the non-suffixed version indicates Tube packaging. The packaging format affects handling and storage but not electrical performance.

Q: Why do some substitute parts have different operating temperature ranges?

A: The 74FCT3807APYG and 74FCT3807AQG variants are rated for 0°C to 70°C (commercial grade), while the 74FCT3807APYGI and 74FCT3807APYGI8 variants are rated for -40°C to 85°C (industrial grade). The industrial-grade variants include the "I" designation in the part number. Applications requiring operation below 0°C or above 70°C must use the industrial-grade variants.

Q: Can I use a 74FCT3807 series part (100 MHz) in place of a 74FCT20807 series part (166 MHz)?

A: Only if your application operates at or below 100 MHz. The 74FCT3807 series has a lower maximum frequency rating and should not be used in systems designed for 166 MHz operation. Conversely, the 74FCT20807 series can be used in applications designed for 100 MHz operation, as it exceeds the frequency requirement.

Q: What does the ROHS3 compliance designation mean?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting the use of specific hazardous materials including lead, mercury, cadmium, and certain flame retardants. All listed substitute parts carry ROHS3 compliance, ensuring environmental and regulatory compatibility with modern manufacturing standards.

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