Part A
AD7502JN
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 1654 個数
- Package
- DIP-16
- Series
- インターフェース - アナログスイッチ、マルチプレクサ、デマルチプレクサ
Replacement verdict
Not a drop-in replacement
The AD7502JN and AD7501KN are not drop-in replacements for one another. The AD7502JN is a dual 4-channel analog multiplexer, while the AD7501KN is a single 8-channel analog multiplexer, so their channel architecture, pinout, and switching configuration differ fundamentally. Designers must verify channel count, package pinout, and control logic before considering either device as a substitute in an existing socket.
Different channel configuration
Different pinout
Different switch topology
Different control logic
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD7502JN | AD7501KN | Why it matters |
|---|---|---|---|
| Switch Configuration | 2-channel differential (dual 4:1) | 8-channel single-ended (8:1) | Determines whether the part routes differential pairs or single-ended signals, which fundamentally changes circuit topology and cannot be substituted directly. |
| Number of Channels | 4 (two differential channels selected from 4 pairs) | 8 (single-ended) | Channel count affects how many signal sources can be multiplexed and the required control logic addressing. |
| On-Resistance (RON) | ~300 Ω typical | ~300 Ω typical | On-resistance introduces signal attenuation and error; matching values help preserve accuracy when swapping parts. |
| Supply Voltage Range | ±10 V to ±18 V dual supply | ±10 V to ±18 V dual supply | The analog signal swing and compatibility with surrounding circuitry depend on the supply rails. |
| Package | 16-lead PDIP (N) | 16-lead PDIP (N) | Footprint and pin count must match for board-level interchangeability. |
| Operating Temperature Range | 0 °C to +70 °C (commercial) | 0 °C to +70 °C (commercial) | Temperature grade affects reliability and suitability for the target environment. |
| Control Logic Inputs | 2 address lines (A0, A1) plus enable | 3 address lines (A0, A1, A2) plus enable | Different address-line counts require different driving logic and PCB routing. |
| Switching Time (tON/tOFF) | ~1 µs typical | ~1 µs typical | Switching speed limits multiplexing rate and settling behavior in the application. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7502JN | AD7501KN |
|---|---|---|
| Supplier | Rochester Electronics, LLC | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Mounting Type | Through Hole | Through Hole |
| Switch Circuit | SP4T | - |
| Multiplexer / Demultiplexer Circuit | 4:1 | - |
| Number of Circuits | 2 | - |
| On - State Resistance(Max) | 300Ohm | - |
| Channel - to - Channel Matching(ΔRon) | 12Ohm | - |
| Voltage - Supply, Single (V+) | ±15V | - |
| Voltage - Supply, Dual (V±) | ±15V | - |
| Switch Time(Ton Toff)(Max) | 800ns, 800ns | - |
| Channel Capacitance(CS(off)CD(off)) | 5pF | - |
| Current - Leakage(IS(off))(Max) | 2nA | - |
| Operating Temperature | -25°C ~ 85°C | - |
Frequently asked questions
What are the primary differences between the AD7502JN and AD7501KN?
The AD7502JN is a dual 4-channel analog multiplexer, while the AD7501KN is a single 8-channel analog multiplexer. Both are CMOS devices in 16-pin DIP packages, but the AD7502JN provides two independent 4-channel multiplexers with a common A0/A1 address and separate enable inputs, whereas the AD7501KN provides one 8-channel multiplexer addressed by A0, A1, and A2.
Are the AD7502JN and AD7501KN pin-compatible?
No. Although both are 16-pin DIP devices, their pin functions differ. The AD7501KN uses pins for an 8-channel single-ended multiplexer with three address lines (A0, A1, A2) and one enable input, while the AD7502JN uses pins for two 4-channel multiplexers with two address lines (A0, A1) and two enable inputs (EN1, EN2). Direct substitution without PCB rework is not possible.
What are the key analog signal specifications for these multiplexers?
Both the AD7501KN and AD7502JN are CMOS analog multiplexers designed for signal switching with low on-resistance and low leakage. Verified datasheet parameters include on-resistance in the tens to low hundreds of ohms range, low off-channel leakage current, and CMOS/TTL-compatible digital control inputs. Designers should consult the specific manufacturer datasheet for exact limits over the operating temperature range.
What power supply voltages do the AD7501KN and AD7502JN require?
Both devices are designed for dual-supply operation, typically ±15 V, and are also specified for single-supply operation in some conditions. The digital control inputs are compatible with standard CMOS and TTL logic levels. Exact supply range and logic threshold limits should be verified against the manufacturer datasheet for the specific grade.
Can the AD7502JN be used to replace the AD7501KN in an existing 8-channel design?
Not directly. The AD7501KN is an 8-channel single multiplexer, while the AD7502JN is a dual 4-channel multiplexer. Replacing one with the other requires changes to the address decoding, enable logic, and PCB layout, since the channel count, address lines, and enable structure differ. A functional equivalence check against the system requirements is mandatory before substitution.
What are the package and temperature grade considerations for the JN and KN suffixes?
The "JN" and "KN" suffixes denote commercial temperature range plastic DIP packages in the Analog Devices naming convention. Both the AD7502JN and AD7501KN are specified for 0°C to +70°C operation in 16-pin plastic DIP. Designers requiring industrial or extended temperature ranges should select the corresponding grade rather than relying on the commercial suffix parts.
Which device is better suited for differential signal switching?
The AD7502JN is better suited for differential signal switching because its dual 4-channel architecture allows two matched multiplexers to switch a differential pair simultaneously using a common address. The AD7501KN, as a single 8-channel multiplexer, is intended for single-ended signal routing and would require two devices for differential switching.