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DS56X/T&R Equivalent & Substitute Parts
Part Overview
The DS56X/T&R is an 8-FlipChip integrated circuit comparator manufactured by Analog Devices Inc./Maxim Integrated, designed for temperature sensing applications with dual supply operation across 3V to 5V. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The device operates across an extended temperature range of -40°C to 125°C and draws 225 µA supply current in its original configuration.
Substiute Parts
Key Parameters
| Parameter | DS56X/T&R |
|---|---|
| Manufacturer | Analog Devices Inc./Maxim Integrated |
| Category | Interface, Integrated Circuits (ICs) |
| Type | Temperature Sensor |
| Input Type | Analog |
| Output Type | Digital |
| Current - Supply | 225 µA |
| Operating Temperature | -40°C ~ 125°C |
| Package / Case | 8-FlipChip |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
| RoHS Status | RoHS non-compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the DS56X/T&R is determined by the following critical parameters:
Functional Compatibility: The original part functions as a comparator with analog input and digital output. Substitute parts must provide equivalent comparator functionality with open-drain output topology.
Electrical Operating Range: The DS56X/T&R operates at 3V to 5V supply. Substitute parts must support this voltage range, though extended ranges are acceptable.
Temperature Range: Operating temperature of -40°C to 125°C is a primary selection criterion. Substitute parts meeting or exceeding this range maintain thermal compatibility.
Package Compatibility: The original 8-FlipChip package is obsolete. Substitute parts use standard surface-mount packages (8-SOIC, 8-TSSOP, 8-MiniSO) that are functionally equivalent in pinout and electrical performance.
Compliance Status: RoHS3 compliance is preferred for modern procurement, though the original part is RoHS non-compliant.
The following substitute parts meet these criteria through equivalent comparator architecture, matching supply voltage ranges, and compatible operating temperature specifications.
Parameter Comparison
| Parameter | DS56X/T&R | LMV393IDT | NCS3402DR2G | TC75W59FU,LF | TSX393IPT | TSX393IST |
|---|---|---|---|---|---|---|
| Manufacturer | Analog Devices Inc./Maxim Integrated | STMicroelectronics | onsemi | Toshiba Semiconductor and Storage | STMicroelectronics | STMicroelectronics |
| Type | Temperature Sensor | General Purpose | General Purpose | General Purpose | CMOS | CMOS |
| Output Type | Digital | Open-Drain | Open-Drain | Open-Drain | Open-Drain | Open-Drain |
| Number of Elements | 1 | 2 | 2 | 2 | 2 | 2 |
| Voltage - Supply, Single/Dual (±) | 3V ~ 5V | 2.7V ~ 5V | 2.5V ~ 16V | 1.8V ~ 7V, ±0.9V ~ 4.6V | 2.7V ~ 16V, ±1.35V ~ 8V | 2.7V ~ 16V, ±1.35V ~ 8V |
| Current - Supply | 225 µA | 120 µA (Quiescent Max) | 640 nA (Quiescent Max) | 220 µA (Quiescent Max) | 13 µA (Quiescent Max) | 8 µA (Quiescent Max) |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 85°C | -40°C ~ 125°C | -40°C ~ 85°C | -40°C ~ 125°C | -40°C ~ 125°C |
| Package / Case | 8-FlipChip | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-TSSOP, 8-MSOP (0.110", 2.80mm Width) | 8-TSSOP (0.173", 4.40mm Width) | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Product Status | Obsolete | Active | Active | Active | Active | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
LMV393IDT (STMicroelectronics): Active product status with ROHS3 compliance. Operates within the 2.7V to 5V range, covering the original 3V to 5V specification. Quiescent current of 120 µA is comparable to the original 225 µA supply current. Operating temperature range of -40°C to 85°C covers the lower portion of the original specification but does not extend to 125°C. Suitable for applications not requiring the full extended temperature range.
NCS3402DR2G (onsemi): Active product with ROHS3 compliance and extended operating temperature range of -40°C to 125°C, matching the original specification. Supply voltage range of 2.5V to 16V exceeds the original 3V to 5V requirement. Quiescent current of 640 nA is significantly lower than the original 225 µA, providing power efficiency benefits. Propagation delay of 220 µs (typical) is specified. Suitable for applications requiring full temperature range coverage and low power consumption.
TC75W59FU,LF (Toshiba Semiconductor and Storage): Active product with ROHS3 compliance. Supply voltage range of 1.8V to 7V and ±0.9V to 4.6V covers the original specification. Operating temperature range of -40°C to 85°C does not extend to 125°C. Quiescent current of 220 µA closely matches the original 225 µA specification. Propagation delay of 200 ns is specified. Suitable for applications with standard temperature requirements and matching power consumption profiles.
TSX393IPT (STMicroelectronics): Active CMOS comparator with ROHS3 compliance. Supply voltage range of 2.7V to 16V and ±1.35V to 8V exceeds the original specification. Operating temperature range of -40°C to 125°C matches the original extended range. Quiescent current of 13 µA is significantly lower than the original 225 µA. Suitable for applications requiring extended temperature range and low power operation.
TSX393IST (STMicroelectronics): Active CMOS comparator with ROHS3 compliance. Supply voltage range of 2.7V to 16V and ±1.35V to 8V exceeds the original specification. Operating temperature range of -40°C to 125°C matches the original extended range. Quiescent current of 8 µA is the lowest among all substitutes. CMRR of 85 dB and propagation delay of 2.5 µs are specified. Suitable for applications requiring extended temperature range and minimal power consumption.
Frequently Asked Questions (FAQ)
Q: Can the DS56X/T&R be directly replaced with any of these substitute parts?
A: Direct replacement depends on application requirements. All substitute parts provide comparator functionality with open-drain output and surface-mount packaging. However, package geometry differs from the original 8-FlipChip, requiring PCB layout modification. Verify supply voltage range, operating temperature requirements, and quiescent current specifications against your application before selection.
Q: Which substitute part best matches the original operating temperature range?
A: NCS3402DR2G, TSX393IPT, and TSX393IST all support the full -40°C to 125°C operating temperature range specified for the DS56X/T&R. LMV393IDT and TC75W59FU,LF are limited to -40°C to 85°C and are suitable only for applications not requiring operation above 85°C.
Q: What is the impact of package change from 8-FlipChip to 8-SOIC, 8-TSSOP, or 8-MiniSO?
A: Package change requires PCB redesign. 8-SOIC (0.154" width), 8-TSSOP (0.110" to 0.173" width), and 8-MiniSO (0.118" width) are standard surface-mount packages with different footprints and pin spacing. Pinout compatibility must be verified against the original schematic. Consult package datasheets for exact dimensions and land pattern requirements.
Q: How do quiescent current differences affect system design?
A: The original DS56X/T&R draws 225 µA supply current. Substitute parts range from 8 µA (TSX393IST) to 640 nA (NCS3402DR2G) quiescent current. Lower quiescent current reduces power consumption in battery-powered or low-power applications. Higher quiescent current (LMV393IDT at 120 µA, TC75W59FU,LF at 220 µA) remains comparable to the original specification.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All five substitute parts carry ROHS3 compliance certification. The original DS56X/T&R is RoHS non-compliant. Selection of any substitute part satisfies modern RoHS3 procurement requirements.
Q: What is the significance of CMOS versus General Purpose type classification?
A: TSX393IPT and TSX393IST are classified as CMOS comparators, while LMV393IDT, NCS3402DR2G, and TC75W59FU,LF are general-purpose comparators. CMOS devices typically feature lower quiescent current and higher input impedance. General-purpose devices may offer different propagation delay and output current characteristics. Selection depends on specific circuit requirements for speed, power consumption, and output drive capability.
Q: Can substitute parts be used interchangeably in the same application?
A: No. While all parts provide comparator functionality, differences in operating temperature range, quiescent current, propagation delay, and package geometry require application-specific evaluation. Verify electrical specifications, thermal requirements, and PCB layout compatibility before substitution.
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