SN75119P - 5V Differential Line Transceiver | Texas Instruments
MPN: SN75119P ✓ ActiveSN75119P Overview
A differential line transceiver is an interface IC that bridges conventional TTL-compatible digital logic and a balanced data line. The transmitter converts a TTL input into a differential output, while the receiver converts differential line voltage into a TTL-compatible output. This two-wire differential arrangement helps reject common-mode noise, supports longer interconnects than single-ended logic in appropriate systems, and allows bidirectional communication when driver and receiver controls are managed correctly.
The SN75119 family provides 3-state driver output circuitry, TTL-compatible driver inputs, TTL-compatible receiver output, and differential line operation. The receiver includes an enable control for placing its output in a high-impedance state. The SN75119 uses the SN75119 family arrangement in which the receiver output strobe and driver enable functions are combined for party-line operation. These features make the device useful where several bus nodes need controlled connection and disconnection.
Typical applications include industrial data buses, instrumentation interfaces, computer peripheral links, point-to-point balanced links, and multi-drop communication networks. Designers should pay attention to the enable timing, termination strategy, cable length, node count, and logic levels when connecting the device to a differential line. The 8-pin PDIP package is suitable through-hole assembly and is particularly useful for legacy equipment, repair, and prototype systems where a small surface-mount package would be inconvenient.
For new designs, verify the complete electrical limits and recommended operating conditions in the manufacturer datasheet before applying the transceiver to a specific bus. A proper system design uses compatible line termination, controlled tri-state timing, and a defined idle state. The SN75119P remains useful when maintaining or expanding equipment that already uses the SN75119 family interface.
This page combines the device’s core operating characteristics, practical bus-design guidance, application context, and available replacement information to support faster component evaluation and sourcing decisions.
Drop-in alternatives for SN75119P — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
SN75119PE4
✅ Drop-In📋 Reference alternative (not in catalog)
SN75118P
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
SN75117P
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
SN75116P
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
SN75119P Specifications
| Product Type | Differential line transceiver |
| Supply Voltage | 5 V |
| Logic Compatibility | TTL-compatible |
| Driver Output State | 3-state |
| Receiver Output State | 3-state differential receiver |
| Driver Input Compatibility | TTL-compatible |
| Receiver Output Compatibility | TTL-compatible |
| Line Configuration | Differential line operation |
| Application Category | Party-line and data-bus interface |
| Package | 8-pin PDIP (P) |
| Number of Pins | 8 pins |
| Mounting Type | Through-hole |
| Transceiver Configuration | 1/1 full transceiver |
SN75119P 8-pin pdip (p) Pin Configuration Guide
Pin configuration for SN75119P (8-pin pdip (p) package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for SN75119P.
Refer to the datasheet for full pin configuration.
Typical Applications
SN75119P is suitable for 6 applications: Industrial Multi-Drop Data Bus, Point-to-Point Balanced Data Link, Instrumentation and Measurement Interface, Computer Peripheral Data Interface, Process-Control Communication Link, Legacy Equipment Repair and Retrofit.
Industrial Multi-Drop Data Bus
The SN75119P fits industrial multi-drop buses because its 5 V differential driver can be placed in a 3-state state while its receiver continues monitoring the line. This allows multiple nodes to share a balanced bus when only one node transmits at a time. The 8-pin PDIP package also simplifies through-hole assembly and field replacement in legacy control equipment. Designers should define enable sequencing, bus idle behavior, termination, and node isolation so that active drivers never contend. The receiver output is TTL-compatible, making the device suitable for systems that combine balanced cabling with conventional digital logic.
Recommended
Point-to-Point Balanced Data Link
The SN75119P can connect two TTL-compatible digital endpoints over a differential line when a full-duplex path is required. Its transmitter provides a 3-state output and its receiver accepts differential line signals, supporting a robust interface structure for industrial controls, test equipment, and peripheral systems. The common-mode behavior of the connected line and the timing relationship between the two nodes must be considered during implementation. Designers should follow the manufacturer application guidance for cable termination, receiver enable timing, and the treatment of the disabled line state.
Recommended
Instrumentation and Measurement Interface
The SN75119P is useful as a balanced interface between TTL-based measurement or control logic and a remote instrumentation line. Its differential line operation helps preserve data integrity when the interconnect passes near switching equipment or crosses between equipment areas. The 3-state driver permits a shared line during controlled test sequences, while the receiver supplies a TTL-compatible result to the measurement controller. The implementation should verify the maximum cable length, termination arrangement, propagation delay, and enable timing against the operating environment before the design is released.
Recommended
Computer Peripheral Data Interface
The SN75119P can bridge TTL-compatible peripheral logic and a differential bus in equipment where the original design uses a through-hole bus transceiver. A 5 V supply matches many legacy peripheral systems, while the 8-pin PDIP package supports repair and retrofit assemblies. Designers should preserve the original enable sequence and verify differential voltage levels and bus polarity at both ends of the cable. This application is most appropriate when maintaining an existing interface architecture rather than introducing a new high-speed protocol without a complete timing review.
Recommended
Process-Control Communication Link
The SN75119P is appropriate for a process-control communication link that must connect a controller to remote I/O over a balanced line. TTL-compatible logic interfaces directly with common digital control systems, and the differential line reduces susceptibility to common-mode interference in industrial environments. The 3-state output supports shared-bus architectures, but the system controller must guarantee exclusive bus ownership during transmission. Engineers should evaluate electrical limits, grounding strategy, cable length, node count, and isolation requirements before using the device in a safety- or mission-critical control path.
Recommended
Legacy Equipment Repair and Retrofit
The SN75119P is particularly practical for repairing legacy equipment that uses an 8-pin PDIP differential line transceiver. Its through-hole package matches many older controller boards and simplifies socketed or board-level replacement work. The family provides TTL-compatible driver inputs and receiver output, preserving the logic interface used by the original equipment. Before installation, technicians should compare the pin functions, enable polarity, supply requirements, and timing characteristics of the installed device. A family member should be selected only when those control functions are equivalent.
Recommended
Recommended Products Summary
Engineering reference data for SN75119P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SN75119PE4 | SN75118P | SN75117P | SN75116P |
|---|---|---|---|---|---|
| Package | 8-pin PDIP (P) | 8-pin PDIP (P) - same | 8-pin PDIP (P) - same | 8-pin PDIP (P) - same | 8-pin PDIP (P) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Type | Differential line transceiver | Differential line transceiver | Differential line transceiver | Differential line transceiver | Differential line transceiver |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V |
| Logic Compatibility | TTL-compatible | TTL-compatible | TTL-compatible | TTL-compatible | TTL-compatible |
| Line Configuration | Differential | Differential | Differential | Differential | Differential |
| Application Focus | Party-line and data-bus applications | Party-line and data-bus applications | Party-line and data-bus applications | Party-line and data-bus applications | Party-line and data-bus applications |
Key Differentiators
- Exact family ordering variant (vs SN75119PE4)
- Enable-oriented control arrangement (vs SN75117P)
- Direct fit for legacy through-hole systems (vs SN75118P)
Design Notes
Route the two conductors of the differential line as a closely coupled pair, maintain a consistent impedance over the useful cable length, and keep the transceiver and termination network close together. Avoid routing the balanced signal next to switching nodes or high-current power paths. The manufacturer application information should be used for the final termination placement and ground-return strategy.
Ensure that the driver enable and receiver enable functions are never asserted in a way that allows two nodes to drive the same line simultaneously. Include defined idle behavior and startup sequencing in the controller. When substituting a related family member, compare the enable polarity, receiver-output strobe behavior, and timing table rather than relying only on the package outline.
Provide a stable 5 V supply and route the decoupling connection directly to the device supply and ground pins. Keep the supply path compact so switching current from the driver does not share a long trace with the receiver's signal ground. Review the manufacturer limits before using the transceiver at the extremes of the supply range or with unusually long cables.
Compliance Information
No specific environmental or automotive compliance status was identified for the exact SN75119P ordering code.