Request Quote
(Ships tomorrow)
PI74FCT245DTQE Equivalent & Substitute Parts
Part Overview
The PI74FCT245DTQE is a non-inverting octal bidirectional transceiver manufactured by Diodes Incorporated, designed for 5.25V logic applications. This component features 1 element with 8 bits per element, 3-state output capability, and is housed in a 20-QSOP surface mount package. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | PI74FCT245DTQE |
| Manufacturer | Diodes Incorporated |
| Logic Type | Transceiver, Non-Inverting |
| Number of Elements | 1 |
| Number of Bits per Element | 8 |
| Output Type | 3-State |
| Current - Output High / Low | 15mA / 64mA |
| Voltage - Supply | 4.75V ~ 5.25V |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
| Package / Case | 20-SSOP (0.154", 3.90mm Width) |
| Supplier Device Package | 20-QSOP |
| Base Product Number | 74FCT245 |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the PI74FCT245DTQE is determined by the following critical parameters:
Primary Substitution Criteria:
- Logic Type: Transceiver, Non-Inverting
- Number of Elements: 1
- Number of Bits per Element: 8
- Output Type: 3-State
- Voltage Supply Range: 4.75V ~ 5.25V
- Operating Temperature Range: -40°C ~ 85°C
- Mounting Type: Surface Mount
- Base Product Number: 74FCT245 series
Package Compatibility Considerations:
- 20-QSOP and 20-SSOP packages are mechanically and electrically compatible for this application
- 20-TSSOP package (0.173", 4.40mm Width) represents a wider pitch variant but maintains electrical compatibility
Substitute parts are grouped into two categories:
Category 1: Direct Electrical Equivalents (5.25V Supply) Parts maintaining identical output current specifications (15mA high, 64mA low) and voltage supply range. These include CY74FCT245DTQCT, 74FCT245ATPGG, 74FCT245ATQG8, 74FCT245CTQG8, CY74FCT2245ATPWR, CY74FCT2245ATQCT, CY74FCT2245CTQCT, and CY74FCT2245TQCT.
Category 2: Voltage-Reduced Variants (3.6V Supply) Parts operating at reduced voltage supply (2.7V ~ 3.6V) with correspondingly reduced output current specifications (8mA high, 24mA low). These include 74FCT3245APGG and 74FCT3245APGG8. These variants are suitable only for applications designed for 3.6V logic levels.
Parameter Comparison
| Part Number | Manufacturer | Logic Type | Output Current (High/Low) | Voltage Supply | Operating Temp | Package | Product Status | MSL |
|---|---|---|---|---|---|---|---|---|
| PI74FCT245DTQE | Diodes Incorporated | Transceiver, Non-Inverting | 15mA / 64mA | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-QSOP | Obsolete | 1 |
| CY74FCT245DTQCT | Texas Instruments | Transceiver, Non-Inverting | 32mA / 64mA | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-SSOP | Discontinued at DiGi Electronics | 2 |
| 74FCT245ATPGG | IDT | Transceiver, Non-Inverting | 15mA / 64mA | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-TSSOP | Active | Not specified |
| 74FCT245ATQG8 | Renesas Electronics | Transceiver, Non-Inverting | 15mA / 64mA | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-QSOP | Active | 1 |
| 74FCT245CTQG8 | IDT | Transceiver, Non-Inverting | 15mA / 64mA | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-QSOP | Active | Not specified |
| 74FCT3245APGG | Renesas Electronics | Transceiver, Non-Inverting | 8mA / 24mA | 2.7V ~ 3.6V | -40°C ~ 85°C | 20-TSSOP | Active | 1 |
| 74FCT3245APGG8 | Renesas Electronics | Transceiver, Non-Inverting | 8mA / 24mA | 2.7V ~ 3.6V | -40°C ~ 85°C | 20-TSSOP | Active | 1 |
| CY74FCT2245ATPWR | Texas Instruments | Transceiver, Non-Inverting | 15mA / 12mA | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-TSSOP | Active | 1 |
| CY74FCT2245ATQCT | Texas Instruments | Transceiver, Non-Inverting | 15mA / 12mA | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-SSOP | Active | 2 |
| CY74FCT2245CTQCT | Texas Instruments | Transceiver, Non-Inverting | 15mA / 12mA | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-SSOP | Active | 2 |
| CY74FCT2245TQCT | Texas Instruments | Transceiver, Non-Inverting | 15mA / 12mA | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-SSOP | Active | 1 |
Engineering Selection Recommendations
For Direct Replacement (5.25V Applications):
Select from active product status parts with matching 4.75V ~ 5.25V supply voltage and -40°C ~ 85°C operating temperature range. The following parts provide the closest electrical match:
- 74FCT245ATQG8 (Renesas Electronics): Active status, 20-QSOP package matching the original, MSL 1, identical output current specifications (15mA / 64mA)
- 74FCT245CTQG8 (IDT): Active status, 20-QSOP package, identical output current specifications
- 74FCT245ATPGG (IDT): Active status, 20-TSSOP package variant, identical output current specifications
These three parts maintain full electrical and thermal compatibility with the PI74FCT245DTQE and are currently in active production.
For Reduced-Voltage Applications (3.6V Logic Systems):
- 74FCT3245APGG or 74FCT3245APGG8 (Renesas Electronics): Active status, designed for 2.7V ~ 3.6V supply voltage with reduced output current (8mA / 24mA). Use only in systems designed for 3.6V logic levels.
Compliance Considerations:
All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original part.
Frequently Asked Questions (FAQ)
Q: Can I use 74FCT3245APGG as a direct replacement for PI74FCT245DTQE?
A: No. The 74FCT3245APGG operates at 2.7V ~ 3.6V supply voltage with reduced output current (8mA / 24mA), while the PI74FCT245DTQE requires 4.75V ~ 5.25V supply. Use 74FCT3245APGG only in applications designed for 3.6V logic levels.
Q: Are 20-QSOP and 20-SSOP packages interchangeable?
A: Yes, for this transceiver application. Both packages maintain the same pin pitch and electrical characteristics. The primary difference is package width (0.154" for SSOP vs. 0.154" for QSOP), which does not affect electrical performance or PCB layout compatibility for standard applications.
Q: What is the difference between 74FCT245 and 74FCT2245 variants?
A: The 74FCT2245 series (CY74FCT2245ATPWR, CY74FCT2245ATQCT, CY74FCT2245CTQCT, CY74FCT2245TQCT) features reduced output low current (12mA vs. 64mA) while maintaining the same high current (15mA) and supply voltage range. This variant is suitable for applications with lower current drive requirements.
Q: Why is the PI74FCT245DTQE listed as obsolete?
A: The part has been discontinued by the manufacturer. Multiple active alternatives from Renesas Electronics, IDT, and Texas Instruments provide equivalent or superior functionality and are currently in production.
Q: Which substitute part has the best long-term availability?
A: Parts with Active product status offer the best long-term availability. 74FCT245ATQG8 (Renesas), 74FCT245CTQG8 (IDT), and 74FCT245ATPGG (IDT) are all actively produced and represent the most reliable choices for new designs.
Q: Does MSL rating affect substitution compatibility?
A: MSL (Moisture Sensitivity Level) rating affects storage and handling requirements but does not impact electrical performance. MSL 1 parts (unlimited shelf life) offer simpler logistics compared to MSL 2 parts (1-year shelf life). Both are functionally compatible.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts