74AHC16373DGVRE4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
74AHC16373DGVRE4 is a 16-bit transparent D-type latch with 3-state outputs, 8 mA drive capability, and 50 pF load capacitance from the AHC CMOS logic family. It captures and holds 16-bit data on dual 8-bit latch banks for bus interfacing and data buffering. Available in a 48-pin TSSOP package for high-density digital PCB designs.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 48
- Lifecycle
- OBSOLETE
- Datasheet
- 74AHC16373DGVRE4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 16-bit transparent D-type latch with dual 8-bit banks enabling simultaneous capture of two independent data bytes in bus-oriented systems
- AHC family 3-state outputs with 8 mA drive current for robust bus driving across multiple logic families from 2V to 5.5V
- 48-pin TSSOP package providing 16-bit data buffering in a compact footprint for high-density embedded processor address and data bus designs
Applications
74AHC16373DGVRE4 is used in microprocessor and DSP memory bus interface circuits where 16-bit address or data lines must be latched and held while the processor advances to the next bus cycle. Its dual 8-bit latch banks allow independent byte-wide control for big-endian and little-endian memory mapping in embedded SoC designs. CPLD and FPGA I/O expansion boards also use this device to extend available parallel output lines while maintaining 3-state bus sharing with other bus masters.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Family | AHC/VHC/H/U/V |
| JESD-30 Code | R-PDSO-G48 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.008A |
| Number of Bits | 8 |
| Number of Functions | 2 |
| Number of Ports | 2 |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP48,.25,16 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Prop. Delay@Nom-Sup | 10.5ns |
| Propagation Delay (tpd) | 16.5ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 3.3V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.4mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the 74AHC16373DGVRE4 transparent latch mode differ from a D flip-flop in data bus buffering?
In transparent mode, 74AHC16373DGVRE4 outputs follow inputs as long as the latch enable (LE) is HIGH, passing data immediately. When LE goes LOW, the last input state is held at the output. This is distinct from a D flip-flop that only captures data on a clock edge. Transparent latches suit address demultiplexing on multiplexed address-data buses where address validity is indicated by a latch enable strobe rather than a clock edge.
What output drive current does 74AHC16373DGVRE4 provide and how many downstream loads can it drive?
74AHC16373DGVRE4 delivers 8 mA output low current per pin. This drive strength can directly sink current from up to 20 standard CMOS inputs (assuming 0.4 mA each) or drive a 50 pF bus trace at AHC switching speeds without significant waveform degradation. For driving long PCB traces or multiple high-capacitance loads, a series termination resistor of 22 Ω to 33 Ω is recommended to suppress reflections.
When is 74AHC16373DGVRE4 preferred over 74LVC16373 for a mixed 3.3V and 5V processor memory bus?
74AHC16373DGVRE4 from the AHC family is 5V tolerant on inputs while operating from a 2V to 5.5V supply, making it suitable for mixed 3.3V logic connected to legacy 5V memory chips. The 74LVC16373 has 5V tolerant inputs on some variants but nominally runs at 1.65V to 3.6V, limiting 5V input compatibility. AHC is preferred when the bus interfaces to 5V SRAM or latched 8051-style external memory in retrofit designs.
How many 74AHC16373DGVRE4 devices are needed to buffer a 32-bit processor data bus?
Two 74AHC16373DGVRE4 devices are needed to buffer a full 32-bit data bus, since each IC provides 16 latch bits split across 2 independent 8-bit banks. Each device fits in a 48-pin TSSOP package measuring approximately 12.5 mm x 6.1 mm, so both together consume about 25 mm x 6.1 mm of PCB area — a substantial saving compared to using four 8-bit 74AHC373 devices in SOIC-20 packages.
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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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