SN74ACT373-EP - Octal D-Type Transparent Latch | Texas Instruments
MPN: SN74ACT373-EP β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.25 | $1.25 |
| 10 | $1.12 | $11.20 |
| 100 | $0.98 | $98.00 |
| 500 | $0.85 | $425.00 |
| 1,000 | $0.75 | $750.00 |
Drop-in alternatives for SN74ACT373-EP β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
SN74ACT373
β Drop-Inπ Reference alternative (not in catalog)
SN74ACT373-EP
β Drop-Inβ In Stock
$0.75 / Unit
View Datasheet βMC74ACT373
β Drop-Inπ Reference alternative (not in catalog)
74ACT373SCX
β Drop-Inπ Reference alternative (not in catalog)
CD74ACT373
β Drop-Inπ Reference alternative (not in catalog)
SN74ACT373-EP Maximum Ratings & Electrical Characteristics
| Technology Family | ACT |
| Number of Channels | 8 |
| Output Type | 3-State |
| Input Type | TTL-Compatible |
| Supply Voltage (VCC) | 4.5 V to 5.5 V |
| Maximum Propagation Delay (tpd) | 5 V (typical) |
| Operating Temperature Range | -40Β°C to 125Β°C |
| Package Type | SOIC-20, SSOP-20, TSSOP-20, PDIP-20 |
| Mounting Type | Surface Mount or Through Hole |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| Number of Bits | 8 |
| Latch Type | Transparent |
| High-Level Output Current (IOH) | [DATA_NEEDED: IOH] |
| Low-Level Output Current (IOL) | [DATA_NEEDED: IOL] |
SN74ACT373-EP Pin Configuration
| Pin 1 | OE β Output enable (active low) |
| Pin 2 | 1Q β Output 1 |
| Pin 3 | 1D β Data input 1 |
| Pin 4 | 2D β Data input 2 |
| Pin 5 | 2Q β Output 2 |
| Pin 6 | 3Q β Output 3 |
| Pin 7 | 3D β Data input 3 |
| Pin 8 | 4D β Data input 4 |
| Pin 9 | 4Q β Output 4 |
| Pin 10 | GND β Ground |
| Pin 11 | LE β Latch enable |
| Pin 12 | 5Q β Output 5 |
| Pin 13 | 5D β Data input 5 |
| Pin 14 | 6D β Data input 6 |
| Pin 15 | 6Q β Output 6 |
| Pin 16 | 7Q β Output 7 |
| Pin 17 | 7D β Data input 7 |
| Pin 18 | 8D β Data input 8 |
| Pin 19 | 8Q β Output 8 |
| Pin 20 | VCC β Power supply |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
SN74ACT373-EP is suitable for 6 applications: Address Latching in Microprocessor Systems, Data Buffering in Memory Interfaces, General-Purpose I/O Expansion, Bus-Oriented Systems, Industrial Control Systems, Automotive Electronics.
Address Latching in Microprocessor Systems
The SN74ACT373-EP is used to latch address lines in microprocessor systems, providing stable addresses during bus cycles. Its 3-state outputs allow multiple devices to share the address bus without contention. The high drive capability ensures reliable operation with capacitive loads. The wide temperature range makes it suitable for industrial controllers.
Recommended
Data Buffering in Memory Interfaces
In memory systems, the SN74ACT373-EP buffers data lines between the memory and the controller. Its 3-state outputs enable bus sharing, and the transparent latch mode allows data to pass through when LE is high. The TTL-compatible inputs simplify interfacing with legacy memory devices. The device's high drive current supports long trace lengths.
Recommended
General-Purpose I/O Expansion
The SN74ACT373-EP can be used to expand the number of I/O lines in a system. By latching data from a microcontroller, it provides additional output lines that can drive LEDs, relays, or other peripherals. The 3-state outputs allow multiple latches to share a common bus, enabling scalable I/O expansion. Its low power consumption is ideal for portable devices.
Recommended
Bus-Oriented Systems
The SN74ACT373-EP is designed for bus-organized systems where multiple devices share a common data bus. Its 3-state outputs can be placed in high-impedance state to avoid bus contention. The buffered OE input allows easy control of output enable. The device's high drive capability eliminates the need for external pullup resistors, simplifying the bus interface.
Recommended
Industrial Control Systems
In industrial control systems, the SN74ACT373-EP provides reliable latching and buffering of control signals. Its extended temperature range (-40Β°C to 125Β°C) ensures operation in harsh environments. The device's high noise immunity and TTL compatibility make it suitable for interfacing with sensors and actuators. The 3-state outputs allow multiplexing of multiple control lines.
Recommended
Automotive Electronics
The SN74ACT373-EP is suitable for automotive electronics due to its Enhanced Product rating and wide temperature range. It can be used for latching sensor data, controlling actuators, or buffering communication lines. The device's robustness and reliability meet automotive standards. Its 3-state outputs are useful for multiplexing signals in body control modules.
Recommended
Recommended Products Summary
Engineering reference data for SN74ACT373-EP β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SN74ACT373 | MC74ACT373 | 74ACT373SCX |
|---|---|---|---|---|
| Package | SOIC-20, SSOP-20, TSSOP-20, PDIP-20 | SOIC-20, SSOP-20, TSSOP-20, PDIP-20 | SOIC-20, TSSOP-20 | SOIC-20 |
| Brand | Texas Instruments | Texas Instruments | onsemi | onsemi |
| Supply Voltage Range | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V |
| Output Type | 3-State | 3-State | 3-State | 3-State |
| Number of Bits | 8 | 8 | 8 | 8 |
| Operating Temperature Range | -40Β°C to 125Β°C | 0Β°C to 70Β°C | -40Β°C to 85Β°C | -40Β°C to 85Β°C |
| Propagation Delay (tpd) | 5V (typical) | 5V (typical) | 5V (typical) | 5V (typical) |
| RoHS Compliant | Yes | Yes | Yes | Yes |
Key Differentiators
- Enhanced Product rating for extended temperature range (vs SN74ACT373)
- Wide package availability (vs 74ACT373SCX)
- TTL-compatible inputs (vs MC74ACT373)
Design Notes
The SN74ACT373-EP operates from a 4.5V to 5.5V supply. Ensure adequate decoupling capacitors (0.1uF and 10uF) are placed close to the VCC pin to minimize power supply noise. The device's quiescent current is low, but dynamic switching currents can cause voltage dips; use a solid ground plane to reduce inductance.
For high-speed bus applications, keep traces short and matched in length to minimize skew. The 3-state outputs can drive capacitive loads, but excessive capacitance can increase propagation delay. Use series termination resistors (33-ohm) if the trace length exceeds 2 inches to reduce reflections.
Ensure the OE input is not left floating; tie it to GND to enable outputs or to VCC to disable them. The LE input should be driven with a clean signal to avoid unintended latching. When multiple devices share a bus, only one should have its outputs enabled at a time to prevent bus contention.
Compliance Information
RoHS compliant per TI product page. Enhanced Product rating for extended temperature range.
