SN74HC373APW Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
SN74HC373APW is a high-speed CMOS 8-bit D-type transparent latch with 3-state outputs by Texas Instruments. Key specs: 2 V to 6 V supply, 8-bit wide 1:1 channel, 20-TSSOP package, tri-state bus-driving capability. From $0.35 in stock, worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- SN74HC373APW Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-bit D-type transparent latch with tri-state outputs for direct connection to multiplexed 8-bit data buses
- 2 V to 6 V wide supply range with high-speed CMOS switching, compatible with both 3.3 V and 5 V logic systems
- 20-TSSOP surface-mount package enabling compact PCB layouts with 0.65 mm pitch for space-constrained designs
- Active-high output enable (OE) and latch enable (LE) controls allow precise bus isolation and data hold cycles
Applications
SN74HC373APW is used in address/data bus demultiplexing circuits for 8-bit microprocessors and FPGAs that share a multiplexed bus, capturing and holding the address byte during the access cycle. It fits SRAM and peripheral interfacing designs where 8 parallel bits must be latched transparently while the bus transitions to data mode. The device is also common in industrial I/O expanders and display controllers that need glitch-free, tri-state-driven output lines.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74HC373APW:
Frequently Asked Questions
How does SN74HC373APW handle bus contention when multiple devices drive an 8-bit data bus?
SN74HC373APW uses an active-low output enable (OE) pin to tri-state all 8 outputs simultaneously. When OE is high, all outputs float to high-impedance, preventing bus contention. This lets multiple latches share a common 8-bit bus with zero drive overlap if OE lines are controlled sequentially.
What is the propagation delay from D input to Q output for SN74HC373APW at 5 V supply?
At 5 V supply, SN74HC373APW has a typical propagation delay of approximately 7 ns from D input to Q output with latch enable high (transparent mode), and about 9 ns maximum at 25°C, making it suitable for bus cycle times down to roughly 20 ns.
Which 8-bit microprocessor bus demultiplexing designs benefit most from SN74HC373APW?
Intel 8051 and Z80 descendants with multiplexed address/data buses benefit most: SN74HC373APW latches the lower 8 address bits during the ALE/AS pulse, giving designers a clean 16-bit address space without an additional address decoder IC. The 20-TSSOP footprint saves board area versus 20-DIP alternatives.
Is SN74HC373APW a pin-compatible alternative to the older 74LS373 and 74ALS373 latches?
Yes, SN74HC373APW is functionally and pin-compatible with 74LS373 and 74ALS373 in the 20-TSSOP footprint, offering lower power consumption (CMOS versus bipolar) and wider supply range of 2 V to 6 V as a drop-in upgrade for legacy circuit board designs.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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