My Inquiry
My Account
Texas Instruments SN74CB3T3384DWR
- Part No.:
- SN74CB3T3384DWR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74CB3T3384DWR.pdf
- Description:
- IC BUS SWITCH 5 X 1:1 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,828
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74CB3T3384DWR from Texas Instruments is a 10-bit FET bus switch with dual 5-bit configurable operation, 5 Ω typical ON-state resistance, bidirectional signal flow, and VCC-referenced voltage translation supporting 0–5-V I/O signaling across 2.3–3.6-V supply range. It enables mixed-mode level shifting between 5-V TTL, 3.3-V LVTTL, and 2.5-V CMOS logic in memory interleaving and bus isolation systems.
For engineers reviewing the SN74CB3T3384DWR datasheet, SN74CB3T3384DWR pinout, SN74CB3T3384DWR application, or SN74CB3T3384DWR equivalent, key selection criteria include its 0.15 ns propagation delay, 5 pF OFF-state I/O capacitance, Ioff partial-power-down support, 5-V-tolerant I/Os under powered-up/down conditions, and SOIC-24 package compatibility with industrial temperature range (−40°C to 85°C).
Technical Context
The SN74CB3T3384DWR implements two independent 5-bit FET-based bus switches controlled by separate OE inputs (1OE, 2OE), enabling flexible configuration as either two 5-bit or one 10-bit switch. Its gate drive architecture tracks VCC to deliver output voltage ≈ VCC − 1 V when VIH ≥ VCC − 1 V, enabling deterministic level translation without external biasing.
Each switch channel features undervoltage clamp diodes on data and control inputs, supports ±128 mA ON-state current, and maintains high-impedance isolation during power-off via Ioff protection. The device meets JESD 17 latch-up immunity (>250 mA) and JESD 22 ESD ratings (2000-V HBM, 1000-V CDM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3 V to 3.6 V - Enables direct interface with 2.5-V and 3.3-V system rails without level-shifter overhead. |
| ON-State Resistance (ron) | 5 Ω typical - Minimizes voltage drop and signal distortion at up to 64 mA per switch path. |
| Propagation Delay (tpd) | 0.15 ns typical - Supports >5 GHz signal integrity for high-speed digital interconnects. |
| I/O Capacitance (Cio(OFF)) | 5 pF typical - Reduces capacitive loading on buses, preserving rise/fall times in dense routing. |
| Ioff Current | 10 µA max at VCC = 0 V - Prevents backflow current during partial power-down, protecting upstream drivers. |
| Input/Output Voltage Range | 0 V to 5.5 V - Allows safe interfacing with 5-V legacy peripherals while operating from 2.5-V/3.3-V supplies. |
| Supply Current (ICC) | 40 µA max - Enables use in battery-powered portable equipment with minimal quiescent load. |
Pinout & Package
SN74CB3T3384DWR is housed in a 24-pin SOIC (DW) package, 7.5 mm × 15.4 mm body size, 1.27 mm pitch, with standard JEDEC MO-153 outline and moisture sensitivity level (MSL) 1 (unlimited floor life at ≤30°C/60% RH).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Output Enable (active-low) | Independent control of each 5-bit switch block; low = ON (A↔B connected), high = high-Z isolation. |
| 1A1–1A5, 2A1–2A5 | Switch Input A-side terminals | Primary data input ports for respective 5-bit blocks; bidirectional with B-side when enabled. |
| 1B1–1B5, 2B1–2B5 | Switch Output B-side terminals | Secondary data ports; electrically identical to A-side; supports mixed-voltage signaling on both sides. |
| VCC | Power supply | Reference for internal FET gate drive and voltage translation; defines VOH ≈ VCC − 1 V threshold behavior. |
| GND | Ground reference | Common return for all I/O and control signals; required for proper clamp diode and Ioff operation. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage translation | Tracks VCC to translate 5-V/3.3-V/2.5-V inputs down to VCC-referenced outputs without external components. |
| 5-V-tolerant I/Os | Operates safely with 0–5.5-V signals on all data/control pins regardless of VCC state (powered-up or powered-down). |
| Bidirectional zero-delay switching | Enables transparent, direction-agnostic signal pass-through with <0.25 ns propagation delay and no timing skew. |
| Ioff partial-power-down protection | Blocks reverse current flow when VCC = 0 V, allowing hot-insertion and safe multi-rail sequencing in complex systems. |
| Low capacitive loading | 5 pF OFF-state I/O capacitance minimizes bus loading, preserving signal integrity in high-density PCB layouts. |
Applications
| Memory Interleaving | Bus Isolation |
|---|---|
|
Use Scenario: Separating two memory banks sharing a common data bus while preventing contention during concurrent access. IC Role / Device Role / Timing Role: Bidirectional 10-bit bus switch isolating address/data lines between memory controllers and DRAM modules. Use Value: Eliminates need for directional buffers or arbitration logic; enables simultaneous bank enable with zero added latency. |
Use Scenario: Isolating a microcontroller's peripheral bus from an external FPGA or ASIC during firmware updates or reset sequences. IC Role / Device Role / Timing Role: Dual 5-bit switch providing hardware-enforced signal disconnect with sub-nanosecond enable/disable timing. Use Value: Prevents spurious writes or reads during reconfiguration; maintains clean bus states without software intervention. |
| Level Translation Bridge | Low-Power Portable Interface |
|
Use Scenario: Connecting a 3.3-V SoC GPIO bank to legacy 5-V sensors or displays in industrial edge devices. IC Role / Device Role / Timing Role: Voltage-translating bus switch translating 5-V inputs to ~2.3–3.6-V compatible outputs using VCC tracking. Use Value: Achieves rail-to-rail compatibility without external resistors or active translators; preserves signal slew rate. |
Use Scenario: Enabling dynamic power gating of USB or SD card interfaces in handheld medical monitors to extend battery life. IC Role / Device Role / Timing Role: Low-quiescent-current (40 µA) bus switch with Ioff support, enabling full signal isolation during sleep mode. Use Value: Reduces system standby current by eliminating leakage paths; eliminates need for discrete MOSFET isolation circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT3384CDW | Higher ICC (120 µA max), no Ioff support, 3.3-V only VCC range (3.0–3.6 V), same SOIC-24 package. | Lacks partial-power-down capability; unsuitable for systems requiring hot-swap or multi-rail sequencing. | Select when lowest cost is prioritized and full power-down isolation is not required. |
| SN74LVC1G3157DCKR | Single-pole double-throw (SPDT) analog switch, 5-V tolerant, 6 Ω ron, 10 pF Cio(OFF), SC70-6 package. | Not pin-compatible; limited to 1-bit switching; requires multiple units for 10-bit function. | Select for space-constrained designs needing single-channel isolation with ultra-small footprint. |
Compared with SN74CB3T3384DWR, SN74CBT3384CDW offers lower unit cost but sacrifices Ioff and mixed-supply flexibility, while SN74LVC1G3157DCKR provides miniaturization at the expense of channel count and integrated dual-block control.
Availability
SN74CB3T3384DWR is available at Aetrix Electronics and suitable for memory subsystems, industrial bus architectures, portable instrumentation, and mixed-voltage embedded interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74CB3T3384DWR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with over 90 years of innovation in industrial, automotive, and communications markets.
The SN74CB3T3384DWR belongs to TI's CB3T family of high-speed FET bus switches designed for low-latency, low-power, mixed-voltage digital interconnect in portable, industrial, and computing applications.
FAQ
What is the maximum data rate supported by the SN74CB3T3384DWR?
The SN74CB3T3384DWR does not specify a maximum data rate in MHz/Gbps, but its 0.15 ns typical propagation delay and 5 pF OFF-state capacitance support signal integrity for NRZ data streams exceeding 5 Gbps in well-terminated point-to-point links. Actual achievable rate depends on PCB layout, termination, and driver strength - the SN74CB3T3384DWR itself introduces negligible timing skew or jitter.
Can the SN74CB3T3384DWR be used with a 1.8-V supply?
No. The SN74CB3T3384DWR has a specified VCC operating range of 2.3 V to 3.6 V per the datasheet. Operation below 2.3 V is not characterized and may result in unreliable switching, increased ron, or failure to meet VIH/VIL thresholds. For 1.8-V systems, consider TI's SN74AVC4T245 or similar AVC-family translators instead of the SN74CB3T3384DWR.
Does the SN74CB3T3384DWR require external pull-up resistors on OE pins?
Yes - to ensure high-impedance state during power-up/power-down, OE pins should be tied to VCC through a pull-up resistor. The minimum value depends on the driving source's sink capability; TI recommends ≥10 kΩ for standard CMOS drivers. Leaving OE floating risks undefined switch states and potential bus contention, which applies directly to the SN74CB3T3384DWR's dual-enable architecture.
How does the SN74CB3T3384DWR handle 5-V inputs when powered from 2.5 V?
When VCC = 2.5 V, the SN74CB3T3384DWR accepts 5-V inputs safely due to its 5-V-tolerant I/O structure and internal clamp diodes. Output voltage levels track VCC, yielding VOH ≈ 1.5 V (VCC − 1 V) for high states - sufficient to drive 2.5-V CMOS inputs. This behavior is guaranteed across the full −40°C to 85°C range for the SN74CB3T3384DWR.
Is the SN74CB3T3384DWR RoHS compliant and lead-free?
Yes. The SN74CB3T3384DWR is RoHS compliant with lead finish/NiPdAu (NIPDAU) plating and meets JEDEC MSL Level-1 (unlimited floor life). Its packaging materials and manufacturing process comply with EU Directive 2011/65/EU and TI's environmental standards - confirmed in TI's official Package Option Addendum for the SN74CB3T3384DWR.
SN74CB3T3384DWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CB
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Bus Switch
- Circuit:
- 5 x 1:1
- Independent Circuits:
- 2
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 2.3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SOIC
SN74CB3T3384DWR FAQ
1.How can I place an order for SN74CB3T3384DWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74CB3T3384DWR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SN74CB3T3384DWR reliable?
The price and inventory of SN74CB3T3384DWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74CB3T3384DWR is usually 5 days.
3.What payment methods are accepted for SN74CB3T3384DWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74CB3T3384DWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74CB3T3384DWR?
SN74CB3T3384DWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74CB3T3384DWR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SN74CB3T3384DWR?
For technical support, including SN74CB3T3384DWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74CB3T3384DWR requirements.
6.How does Aetrix verify that SN74CB3T3384DWR is sourced from the original manufacturer or authorized distributors?
All SN74CB3T3384DWR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74CB3T3384DWR meets industry standards.
7.What is the process for return or replacement of SN74CB3T3384DWR?
All SN74CB3T3384DWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74CB3T3384DWR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN74CB3T3384DWR part is unused and in its original packaging.
Return procedure for SN74CB3T3384DWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74CB3T3384DWR Tags
-
SN74HC138DR
Texas Instruments
-
TC7SB3157CFU,LF(CT
Toshiba Semiconductor and Storage
-
74CBTLV3257PW,118
Nexperia USA Inc.
-
SN74CBTLV3257PWR
Texas Instruments
-
74CBTLV3257GUX
Nexperia USA Inc.
-
74HC154BQ,118
Nexperia USA Inc.
-
P3S0200GMX
NXP USA Inc.
-
SN74CB3Q3245PWR
Texas Instruments
-
SN74CB3Q3257RGYR
Texas Instruments
-
TCA9543APWR
Texas Instruments
-
TCA9546APWR
Texas Instruments
-
SN74HC138N
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
