SN74CBTLV3861PWG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The SN74CBTLV3861PWG4 is a 10-bit low-voltage CMOS bus switch from Texas Instruments featuring a single-element unidirectional path with active-low enable. It operates at 1.65 V to 3.6 V and supports 50 pF load capacitance in a 24-pin TSSOP package.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 24
- Lifecycle
- OBSOLETE
- Datasheet
- SN74CBTLV3861PWG4 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
- 10-bit unidirectional bus switch with active-low enable for straightforward signal routing control
- Ultra-low ON-resistance passes logic signals with near-zero propagation delay and minimal signal distortion
- 1.65 V to 3.6 V supply range enables mixed-voltage system interfacing between 1.8 V and 3.3 V buses
- 24-pin TSSOP package with 50 pF load capacitance rating suits high-speed data bus switching applications
Applications
The SN74CBTLV3861PWG4 is used in memory bus isolation and data path switching on motherboards, FPGA development boards, and networking line cards where a 10-bit unidirectional switch is needed. Its low-voltage operation between 1.65 V and 3.6 V makes it suitable for interfacing 1.8 V LPDDR memory buses with 3.3 V logic controllers. The device also finds use in test equipment multiplexing and signal path sharing in multi-board embedded systems.
Specifications
| YTEOL | 0 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | CBTLV/3B |
| JESD-30 Code | R-PDSO-G24 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Number of Bits | 10 |
| Number of Functions | 1 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP24,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 0.01mA |
| Prop. Delay@Nom-Sup | 0.25ns |
| Propagation Delay (tpd) | 0.25ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 3.6V |
| Supply Voltage-Min (Vsup) | 2.3V |
| Supply Voltage-Nom (Vsup) | 2.5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| 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
Compatible alternatives and drop-in replacements for SN74CBTLV3861PWG4:
Bus Driver, CBTLV/3B Series, 1-Func, 10-Bit, True Output, CMOS, PDSO24
Bus Driver, CBTLV/3B Series, 1-Func, 8-Bit, True Output, CMOS, PDSO20
Bus Driver, CBTLV/3B Series, 1-Func, 1-Bit, True Output, CMOS, PDSO5
Frequently Asked Questions
What supply voltage range does the SN74CBTLV3861PWG4 operate across for low-voltage bus switching?
The SN74CBTLV3861PWG4 operates from 1.65 V to 3.6 V, covering 1.8 V, 2.5 V, and 3.3 V logic families. This range enables signal routing between LPDDR memory buses at 1.8 V and 3.3 V peripheral interfaces on the same board without level shifting or additional buffers.
How many bits does the SN74CBTLV3861PWG4 switch simultaneously and how is it enabled?
The SN74CBTLV3861PWG4 switches 10 data bits simultaneously through a single-element CMOS switch path. The switch is enabled by driving the active-low enable pin low; when high, all 10 channels are isolated. This simple control scheme reduces glue logic and speeds up bus arbitration in memory and peripheral switching circuits.
At what load capacitance is SN74CBTLV3861PWG4 rated and how does this affect signal integrity?
The SN74CBTLV3861PWG4 is characterized at 50 pF load capacitance, typical for PCB traces driving SDRAM or SRAM devices. Lower capacitive loading results in faster signal transitions, while the CBTLV family's near-zero propagation delay preserves timing margins in high-speed data buses operating above 100 MHz clock rates.
When is SN74CBTLV3861PWG4 preferred over a bus transceiver for data path switching?
A bus switch like the SN74CBTLV3861PWG4 is preferred when bidirectional data flow occurs naturally without a defined direction-control signal, since the CMOS switch path passes signals in both directions without the latency of a registered transceiver. It saves 2-4 ns of propagation delay per stage compared to buffered 74LVCH logic, benefiting memory subsystems with tight setup and hold windows at 3.3 V.
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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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