PI74VCX16374AE Equivalent & Substitute Parts

Part Overview

The PI74VCX16374AE is a dual 8-bit D-type flip-flop logic IC manufactured by Diodes Incorporated in a 48-TFSOP surface mount package. This component functions as a standard positive edge-triggered flip-flop with tri-state, non-inverted outputs, operating across a 1.8V to 3.6V supply voltage range with a maximum clock frequency of 250 MHz.

The PI74VCX16374AE is classified as obsolete. Substitute parts are necessary to maintain design continuity and ensure long-term component availability for new production runs and system updates.

Key Parameters

Parameter	Value
Manufacturer Part Number	PI74VCX16374AE
Manufacturer	Diodes Incorporated
Series	74VCX
Type	D-Type Flip-Flop
Number of Elements	2
Number of Bits per Element	8
Output Type	Tri-State, Non-Inverted
Clock Frequency	250 MHz
Max Propagation Delay @ 3.3V, 30pF	3 ns
Trigger Type	Positive Edge
Current - Output High/Low	24 mA / 24 mA
Voltage - Supply	1.8V ~ 3.6V
Current - Quiescent (Iq)	20 µA
Input Capacitance	6 pF
Operating Temperature	-40°C ~ 85°C
Package / Case	48-TFSOP (0.240", 6.10mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the PI74VCX16374AE are selected based on functional equivalence across the following critical parameters:

Functional Type: D-Type flip-flop with 2 elements, 8 bits per element
Output Configuration: Tri-state, non-inverted outputs
Trigger Mechanism: Positive edge-triggered
Operating Temperature Range: -40°C ~ 85°C
Mounting Type: Surface mount
Supply Voltage Compatibility: Minimum 1.65V to 3.6V (encompasses original 1.8V ~ 3.6V range)
Package Compatibility: 48-pin TFSOP, TVSOP, or SSOP variants

Substitutes are grouped into two categories:

Category 1 - Direct Package Match (48-TFSOP): 74VCX16374MTDX, SN74ALVCH162374GR, SN74ALVCH16374DGG, SN74ALVCH16374DGGR, SN74LVC16374ADGGR

Category 2 - Alternative Package Variants: SN74ALVCH16374DGVR (48-TVSOP), SN74ALVCH16374DL and SN74ALVCH16374DLR (48-SSOP)

All substitute parts maintain functional compatibility with the original PI74VCX16374AE across logic operation, pin configuration, and electrical performance within specified operating conditions.

Parameter Comparison

Parameter	PI74VCX16374AE	74VCX16374MTDX	SN74ALVCH162374GR	SN74ALVCH16374DGG	SN74ALVCH16374DGGR	SN74ALVCH16374DGVR	SN74ALVCH16374DL	SN74LVC16374ADGGR
Manufacturer	Diodes Inc.	Fairchild Semi.	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Series	74VCX	74VCX	74ALVCH	74ALVCH	74ALVCH	74ALVCH	74ALVCH	74LVC
Type	D-Type FF	D-Type FF	D-Type FF	D-Type FF	D-Type FF	D-Type FF	D-Type FF	D-Type FF
Number of Elements	2	2	2	2	2	2	2	2
Bits per Element	8	8	8	8	8	8	8	8
Output Type	Tri-State, Non-Inv.	Tri-State, Non-Inv.	Tri-State, Non-Inv.	Tri-State, Non-Inv.	Tri-State, Non-Inv.	Tri-State, Non-Inv.	Tri-State, Non-Inv.	Tri-State, Non-Inv.
Clock Frequency	250 MHz	250 MHz	150 MHz	150 MHz	150 MHz	150 MHz	150 MHz	150 MHz
Max Prop. Delay @ 3.3V	3 ns (30pF)	3 ns (30pF)	4.6 ns (50pF)	4.2 ns (50pF)	4.2 ns (30pF)	4.2 ns (50pF)	4.2 ns (50pF)	4.5 ns (50pF)
Trigger Type	Positive Edge	Positive Edge	Positive Edge	Positive Edge	Positive Edge	Positive Edge	Positive Edge	Positive Edge
Output Current High/Low	24 mA / 24 mA	24 mA / 24 mA	12 mA / 12 mA	24 mA / 24 mA	24 mA / 24 mA	24 mA / 24 mA	24 mA / 24 mA	24 mA / 24 mA
Supply Voltage Range	1.8V ~ 3.6V	1.2V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V
Quiescent Current (Iq)	20 µA	20 µA	40 µA	40 µA	40 µA	40 µA	40 µA	20 µA
Input Capacitance	6 pF	6 pF	3 pF	6 pF	3 pF	3 pF	3 pF	5 pF
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	48-TFSOP (6.10mm)	48-TFSOP (6.10mm)	48-TFSOP (6.10mm)	48-TFSOP (6.10mm)	48-TFSOP (6.10mm)	48-TVSOP (4.40mm)	48-BSSOP (7.50mm)	48-TFSOP (6.10mm)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	Not specified	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Replacement (Same Package, Same Performance)

The 74VCX16374MTDX (Fairchild Semiconductor) provides the closest functional match to the PI74VCX16374AE. Both operate at 250 MHz clock frequency with 3 ns maximum propagation delay at 3.3V and 30pF load. The 74VCX16374MTDX maintains identical output current specifications (24 mA) and quiescent current (20 µA), with an expanded supply voltage range of 1.2V to 3.6V. This part is active and ROHS3 compliant, ensuring long-term availability and regulatory compliance.

For Texas Instruments Substitutes (Active Status, ROHS3 Compliant)

The SN74ALVCH16374DGG and SN74ALVCH16374DGGR (both 48-TFSOP package) are functionally equivalent alternatives from Texas Instruments. These parts operate at 150 MHz with 4.2 ns maximum propagation delay at 3.3V and 50pF load. Both maintain 24 mA output current and are ROHS3 compliant with MSL 1 rating. The primary trade-off is reduced clock frequency (150 MHz versus 250 MHz) and slightly increased propagation delay, which is acceptable for most applications not requiring maximum speed performance.

For Alternative Package Variants

The SN74ALVCH16374DGVR offers a narrower 48-TVSOP package (4.40mm width) for space-constrained designs, while SN74ALVCH16374DL and SN74ALVCH16374DLR provide a wider 48-BSSOP package (7.50mm width). All maintain functional equivalence with identical electrical specifications to the DGG variant.

For Low Quiescent Current Applications

The SN74LVC16374ADGGR (74LVC series) maintains the original 20 µA quiescent current specification while providing ROHS3 compliance and active product status. This part is suitable for power-sensitive applications where the 40 µA quiescent current of the 74ALVCH variants is unacceptable.

All recommended substitutes are active products with ROHS3 compliance and MSL 1 ratings, ensuring regulatory compliance and long-term component availability.

Frequently Asked Questions (FAQ)

Q: Can I use SN74ALVCH16374DGG as a direct replacement for PI74VCX16374AE?

A: Yes, the SN74ALVCH16374DGG is functionally compatible. Both are dual 8-bit D-type flip-flops with tri-state, non-inverted outputs in 48-TFSOP packages. The primary difference is reduced clock frequency (150 MHz versus 250 MHz) and slightly increased propagation delay (4.2 ns versus 3 ns at 3.3V, 50pF). This substitution is valid for applications not requiring maximum speed performance.

Q: What is the difference between 48-TFSOP, 48-TVSOP, and 48-BSSOP packages?

A: These are all 48-pin surface mount packages with different body widths. The 48-TFSOP (0.240", 6.10mm width) is the standard package matching the original PI74VCX16374AE. The 48-TVSOP (0.173", 4.40mm width) is narrower for space-constrained PCB layouts. The 48-BSSOP (0.295", 7.50mm width) is wider. All three packages maintain identical pin configurations and electrical functionality; selection depends on PCB layout requirements.

Q: Why does the 74VCX16374MTDX have a lower supply voltage minimum (1.2V) than the original part (1.8V)?

A: The 74VCX16374MTDX supports an extended supply voltage range of 1.2V to 3.6V, which encompasses the original 1.8V to 3.6V range. This expanded range provides greater design flexibility without compromising compatibility. The part operates correctly at the original 1.8V minimum specification.

Q: Are all substitute parts ROHS3 compliant?

A: All active substitute parts listed (74VCX16374MTDX, SN74ALVCH162374GR, SN74ALVCH16374DGG, SN74ALVCH16374DGGR, SN74ALVCH16374DGVR, SN74ALVCH16374DL, SN74ALVCH16374DLR, SN74LVC16374ADGGR) are ROHS3 compliant with MSL 1 ratings, ensuring regulatory compliance for new production designs.

Q: What is the impact of increased quiescent current in the 74ALVCH variants?

A: The 74ALVCH series has a quiescent current of 40 µA compared to 20 µA in the original PI74VCX16374AE and the 74LVC16374ADGGR. For battery-powered or low-power applications, this doubling of quiescent current may be significant. The SN74LVC16374ADGGR maintains the original 20 µA specification if power consumption is critical.

Q: Can I mix different substitute parts in the same design?

A: Yes, all substitute parts are functionally equivalent and can be used interchangeably within the same design, provided the application requirements are met. However, for consistency and simplified inventory management, using a single substitute part across a design is recommended.

Q: What is the significance of the "Active" product status for substitute parts?

A: Active product status indicates that the manufacturer continues to produce and support the component, ensuring long-term availability and supply chain stability. The original PI74VCX16374AE is obsolete, meaning Diodes Incorporated no longer manufactures it. Substituting with active parts guarantees continued availability for future production runs and system updates.

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