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DS1620S Equivalent & Substitute Parts
Part Overview
The DS1620S is a digital temperature sensor manufactured by Analog Devices Inc./Maxim Integrated, designed for local temperature measurement across a -55°C to 125°C range with 9-bit resolution. The device operates on a 3-wire interface (CLK, DQ, RST) and supports supply voltages from 2.7V to 5.5V. The DS1620S is currently classified as obsolete, which necessitates identification of functionally equivalent alternatives for new designs and ongoing system support.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Sensor Type | Digital, Local |
| Sensing Temperature Range | -55°C ~ 125°C |
| Resolution | 9 bits |
| Output Type | 3-Wire (CLK, DQ, RST) |
| Supply Voltage | 2.7V ~ 5.5V |
| Accuracy | ±0.5°C (0°C ~ 70°C), ±2°C (-55°C ~ 125°C) |
| Package Type | 8-SOIC (0.209", 5.30mm Width) |
| Mounting Type | Surface Mount |
| Features | One-Shot, Output Switch |
Substitute Part Grouping Explanation
Substitution of the DS1620S is determined by strict equivalence across the following critical parameters:
- Sensor Type: Digital, Local temperature measurement capability
- Temperature Range: -55°C to 125°C operational span
- Resolution: 9-bit output precision
- Output Interface: 3-Wire protocol (CLK, DQ, RST)
- Supply Voltage: 2.7V to 5.5V compatibility
- Accuracy Specification: ±0.5°C within 0°C to 70°C; ±2°C across full range
- Package: 8-SOIC form factor with identical 5.30mm width
- Features: One-Shot and Output Switch functionality
The DS1620S+ meets all these criteria and is therefore a direct functional equivalent suitable for substitution in applications currently using the DS1620S.
Parameter Comparison
| Parameter | DS1620S (Main Part) | DS1620S+ (Substitute) |
|---|---|---|
| Manufacturer | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated |
| Sensor Type | Digital, Local | Digital, Local |
| Sensing Temperature Range | -55°C ~ 125°C | -55°C ~ 125°C |
| Resolution | 9 bits | 9 bits |
| Output Type | 3-Wire (CLK, DQ, RST) | 3-Wire (CLK, DQ, RST) |
| Supply Voltage | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Accuracy | ±0.5°C (±2°C) | ±0.5°C (±2°C) |
| Package / Case | 8-SOIC (0.209", 5.30mm Width) | 8-SOIC (0.209", 5.30mm Width) |
| Mounting Type | Surface Mount | Surface Mount |
| Features | One-Shot, Output Switch | One-Shot, Output Switch |
| Product Status | Obsolete | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
| Packaging | Not specified | Tube |
Engineering Selection Recommendations
The DS1620S+ is the direct substitute for the DS1620S based on complete electrical and mechanical parameter equivalence. Selection of the DS1620S+ is supported by the following factors:
- Active product status ensures ongoing availability and manufacturing support
- ROHS3 compliance of the DS1620S+ meets current environmental and regulatory requirements, whereas the DS1620S is non-compliant
- Identical electrical specifications and 8-SOIC package footprint enable direct board-level substitution without design modification
- Tube packaging of the DS1620S+ provides standard handling and storage compatibility with modern assembly processes
Frequently Asked Questions (FAQ)
Q: Can the DS1620S+ be used as a direct replacement for the DS1620S?
A: Yes. The DS1620S+ is electrically and mechanically equivalent to the DS1620S across all specified parameters, including temperature range, resolution, output interface, supply voltage, accuracy, and package dimensions. No circuit modifications are required.
Q: What is the primary difference between the DS1620S and DS1620S+?
A: The DS1620S is obsolete and RoHS non-compliant, while the DS1620S+ is an active product with ROHS3 compliance. Both devices are functionally identical in electrical performance and physical form factor.
Q: Are there any compatibility concerns when substituting the DS1620S+ for the DS1620S?
A: No compatibility concerns exist. The 3-wire interface (CLK, DQ, RST), supply voltage range (2.7V to 5.5V), and 8-SOIC package are identical. Existing firmware and circuit designs require no modification.
Q: Does the DS1620S+ support the same temperature measurement range?
A: Yes. The DS1620S+ maintains the identical -55°C to 125°C measurement range with 9-bit resolution and ±0.5°C accuracy within the 0°C to 70°C test condition.
Q: What packaging format is the DS1620S+ supplied in?
A: The DS1620S+ is supplied in Tube packaging, which is standard for surface-mount components and compatible with automated assembly equipment.
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