LT1039CJ - Triple ±30V RS-232 Transceiver | Analog Devices
Teilenummer: LT1039CJ ✗ Abgekündigt| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $15.99 | $15,99 |
| 10 | $14.99 | $149,90 |
| 100 | $13.49 | $1.349,00 |
| 500 | $11.99 | $5.995,00 |
| 1.000 | $10.99 | $10.990,00 |
LT1039CJ Übersicht
An RS-232 transceiver is an interface IC that bridges TTL or CMOS logic and the bipolar voltage levels used by EIA-232 serial links. A driver converts logic signals into RS-232 output levels, while a receiver converts bipolar line signals back into logic-compatible levels. The LT1039CJ belongs to the line-driver and receiver hierarchy within interface ICs, combining three complete RS-232 channels plus power-state control in one device.
Key features include operation from single or dual supplies up to ±15 V, overload-protected outputs, three-state shutdown behavior, and receiver inputs that can be driven beyond normal RS-232 levels. The shutdown architecture also includes a BIAS function that allows one receiver to remain active while the rest of the device is shut down. These features are useful when an interface must be disconnected safely from a bus without allowing an inactive driver to disturb the line.
The bipolar implementation supports RS-232 voltage levels while maintaining compatibility with TTL and CMOS receiver outputs. Receiver pins are identified as pins 3, 5, and 7, while driver outputs are pins 4, 6, and 8. The exact pin names and supply connections must be verified against the manufacturer datasheet before PCB assembly or replacement.
Typical applications include industrial serial ports, test equipment, data acquisition systems, legacy computer peripherals, and instrumentation requiring a three-channel RS-232 interface. The LT1039CJ is most appropriate when the design needs more than one RS-232 channel, controlled shutdown, or protection against externally applied high-voltage line transients.
The principal design consideration is ensuring that receiver logic levels and supply sequencing suit the connected controller. RS-232 cable routing should be kept away from noisy power paths, and unused channels should be configured deliberately rather than left floating. The three-state shutdown feature can reduce bus contention, but it does not by itself guarantee compatibility with every RS-232 network.
This page combines the verified LT1039CJ datasheet information, package identification, practical interface guidance, and sourced cross-reference limitations. It is intended to help engineers locate the datasheet, understand the transceiver’s electrical behavior, and assess whether a replacement is genuinely pin-compatible.
Drop-in-Alternativen für LT1039CJ – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit LT1039CJ (gleiche Bauform und Footprint) – abweichend in Package, Product Type, Mounting Type, Driver Output Swing, Number of Drivers.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
LT1039CN
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MAX211IDB
✅ Drop-In✓ Auf Lager
$1.41 / Stück
Datenblatt ansehen →MAX211CDB
✅ Drop-In✓ Auf Lager
$3.2251 / Stück
Datenblatt ansehen →LT1039CJ Technische Daten
| Product Type | Triple EIA-232 line transceiver |
| Number of Drivers | 3 |
| Number of Receivers | 3 |
| Versorgungsspannung | Up to ±15 V |
| Receiver Input Voltage | ±30 V |
| Driver Output Voltage | RS-232 levels; outputs can be driven to ±30 V without damage |
| Receiver Input Impedance | 30 kΩ nominal |
| Receiver Input Hysteresis | 0.4 V |
| Shutdown Output State | High impedance |
| Power-Off Output State | High impedance when V+ and V− are 0 V |
| Driver Logic Input | TTL logic input |
| Receiver Logic Output | TTL or CMOS compatible |
| Short Circuit Protection | Fully short-circuit protected outputs |
| Gehäuse | 18-pin DIP |
| Montageart | Through-hole |
| Supplier Case | DIP18 |
LT1039CJ Pin-Konfiguration
| Pin 1 | V+ — Positive supply connection; exact operating limits are defined in the manufacturer datasheet |
| Pin 2 | V- — Negative supply connection; exact operating limits are defined in the manufacturer datasheet |
| Pin 3 | REC IN — Receiver input |
| Pin 4 | TR OUT — RS-232 driver output |
| Pin 5 | REC IN — Receiver input |
| Pin 6 | TR OUT — RS-232 driver output |
| Pin 7 | REC IN — Receiver input |
| Pin 8 | TR OUT — RS-232 driver output |
| Pin 9 | [DATA_NEEDED: pin name] — Pin function must be confirmed from the complete manufacturer pin table |
| Pin 10 | [DATA_NEEDED: pin name] — Pin function must be confirmed from the complete manufacturer pin table |
| Pin 11 | [DATA_NEEDED: pin name] — Pin function must be confirmed from the complete manufacturer pin table |
| Pin 12 | [DATA_NEEDED: pin name] — Pin function must be confirmed from the complete manufacturer pin table |
| Pin 13 | [DATA_NEEDED: pin name] — Pin function must be confirmed from the complete manufacturer pin table |
| Pin 14 | [DATA_NEEDED: pin name] — Pin function must be confirmed from the complete manufacturer pin table |
| Pin 15 | [DATA_NEEDED: pin name] — Pin function must be confirmed from the complete manufacturer pin table |
| Pin 16 | [DATA_NEEDED: pin name] — Pin function must be confirmed from the complete manufacturer pin table |
| Pin 17 | [DATA_NEEDED: pin name] — Pin function must be confirmed from the complete manufacturer pin table |
| Pin 18 | [DATA_NEEDED: pin name] — Pin function must be confirmed from the complete manufacturer pin table |
Typische Anwendungen
LT1039CJ ist geeignet für 6 Anwendungs: Industrial RS-232 Control Port, Data-Acquisition Interface, Test and Measurement Equipment, Legacy Serial Peripheral, Instrumentation and Service Console, Multi-Port RS-232 Interface.
Industrial RS-232 Control Port
The LT1039CJ fits industrial equipment that needs three RS-232 channels for a controller, status interface, or service port. Its three drivers provide RS-232 output levels, while the three receivers accept bipolar line signals and produce TTL- or CMOS-compatible logic. The receiver inputs are specified to accept up to ±30 V and include 0.4 V hysteresis, which can improve rejection of noise on long or electrically noisy cable runs. The through-hole DIP18 package is also convenient for legacy control boards that are not being redesigned for a surface-mount assembly process.
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Data-Acquisition Interface
A data-acquisition instrument can use the LT1039CJ to connect a controller to external RS-232 equipment such as a fixture, analyzer, or remote sensor interface. The three-channel arrangement reduces the number of separate transceiver packages required when several serial links share a board. The ±30 V receiver tolerance and nominal 30 kΩ input impedance help the interface withstand externally applied bipolar voltages, while overload-protected driver outputs provide additional robustness. Exact logic thresholds and timing should be checked against the system controller before release.
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Test and Measurement Equipment
The LT1039CJ is appropriate for legacy test equipment that requires multiple RS-232 control or communication channels. A receiver can convert bipolar cable signals into logic levels for a digital controller, while a driver can transmit commands from TTL logic to an RS-232 instrument. Shutdown and BIAS functions can help isolate channels during test or firmware update states. Because the retrieved data does not specify the operating temperature range, the final component grade must be confirmed before using the device in production test equipment with elevated ambient temperatures.
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Legacy Serial Peripheral
The LT1039CJ can bridge a modern controller to a legacy peripheral that retains an RS-232 connector and TTL or CMOS logic interface. Three drivers and three receivers allow bidirectional communication without requiring three separate single-channel packages. Its high-impedance output behavior during shutdown is useful when the peripheral port must be disconnected or shared. The DIP18 through-hole format suits older boards, repair assemblies, and systems where a PCB footprint change is undesirable, although the exact connector-side protection network must still be designed for the application’s cable environment.
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Instrumentation and Service Console
The LT1039CJ can support an instrumentation product that needs separate command, response, and diagnostic RS-232 ports. The receiver input tolerance of ±30 V and hysteresis of 0.4 V are relevant when the board is connected through user-accessible cables, while the driver overload protection helps manage accidental output faults. The shutdown function allows unused channels to enter a high-impedance state, and the BIAS option can preserve operation of one receiver when the rest of the transceiver is disabled. Verify the BIAS implementation and control levels in the manufacturer datasheet.
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Multi-Port RS-232 Interface
The LT1039CJ is well suited to a board that must expose three RS-232 channels through a common interface section. Designers can assign separate transmit and receive lines to different peripherals, or use the shutdown and high-impedance behavior to manage shared buses. Its through-hole DIP18 package simplifies insertion into legacy backplanes and repairable assemblies, but the layout must still account for cable transients, ground references, and logic-family compatibility. The verified data identifies three drivers and three receivers, but it does not provide every timing or propagation-delay value.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für LT1039CJ – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | LT1039CN | MAX211IDB | MAX211CDB | MAX3232CD |
|---|---|---|---|---|---|
| Product Type | Triple RS-232 line transceiver | Related LT1039 RS-232 transceiver variant | RS-232 transceiver | RS-232 transceiver | RS-232 transceiver |
| Brand | Analog Devices | Analog Devices | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Number of Drivers | 3 | 3 | 3 | 3 | 3 |
| Number of Receivers | 3 | 3 | 3 | 3 | 3 |
Wichtigste Unterscheidungsmerkmale
- Three integrated RS-232 channels (vs. MAX3232CD)
- Shutdown and three-state operation (vs. LT1039CN)
- Receiver input protection tolerance (vs. MAX211IDB)
Designhinweise
Place the RS-232 connector-side protection and transceiver circuitry near the board entry point, and route the bipolar driver and receiver traces away from clocks, switching regulators, and high-current return paths. The verified LT1039 data identifies receiver inputs on pins 3, 5, and 7 and driver outputs on pins 4, 6, and 8; use those exact nets when planning the layout. Confirm all remaining pin functions from the complete manufacturer pin table before routing power and shutdown signals.
The LT1039 uses bipolar RS-232 signaling and is specified for supplies up to ±15 V. Decouple each supply rail locally and provide a solid, low-impedance ground reference between the transceiver and the RS-232 connector. Do not infer single-supply operation from the existence of separate positive and negative rails; verify the manufacturer’s supply and ground requirements in the datasheet, especially when the surrounding logic uses only a 5 V rail.
Do not treat every RS-232-family IC as a pin-compatible replacement. The verified search data confirms the LT1039CJ as a DIP18 part, while several candidate RS-232 devices use DIP16 packages or may have different shutdown logic, supply pins, and enable polarity. Before substitution, compare every pin, the shutdown state, output impedance, receiver thresholds, and supply limits; a family-level functional match is not enough for a drop-in PCB change.
Compliance-Informationen
The retrieved manufacturer and distributor data does not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is marked not_applicable because this is an interface IC and no automotive qualification was provided.
