My Inquiry
My Account
Texas Instruments SN74CB3Q3384APW
- Part No.:
- SN74CB3Q3384APW
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74CB3Q3384APW.pdf
- Description:
- IC BUS SWITCH 5 X 1:1 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:754
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74CB3Q3384APW from Texas Instruments is a 10-bit FET bus switch optimized for high-bandwidth, low-voltage applications. It features dual 5-bit configurable switching paths, rail-to-rail 0–5 V signal support at 2.5 V/3.3 V VCC, 3 Ω typical ON-state resistance, <0.15 ns propagation delay, and bidirectional data flow with near-zero latency. It serves as a low-distortion signal gate in PCI interfaces and memory interleaving systems.
For engineers reviewing the SN74CB3Q3384APW datasheet, SN74CB3Q3384APW pinout, SN74CB3Q3384APW application, or SN74CB3Q3384APW equivalent, key selection criteria include its 2.3–3.6 V supply range, 5-V-tolerant I/Os with powered-down isolation (Ioff), 4 pF typical OFF-state capacitance, and TSSOP-24 package compatibility with high-density PCB layouts.
Technical Context
The SN74CB3Q3384APW implements two independent 5-bit FET bus switches, each controlled by dedicated OE inputs (1OE, 2OE), enabling flexible partitioning as either two 5-bit or one unified 10-bit switch. Its charge-pump-enhanced gate drive ensures flat ron across input voltage (0–5 V) and supply (2.3–3.6 V) ranges.
It supports partial-power-down operation via Ioff circuitry that blocks current backflow when VCC = 0 V, and integrates undershoot clamp diodes on all control/data pins. The device maintains rail-to-rail analog/digital signal integrity with 500 MHz bandwidth capability and 20 MHz maximum OE switching frequency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3 V to 3.6 V - Enables interoperability with both 2.5 V and 3.3 V logic domains without level shifters. |
| ron (Typ) | 3 Ω - Minimizes voltage drop and signal attenuation across switched paths under 30 mA load. |
| tpd (Max) | 0.15 ns - Delivers near-instantaneous bidirectional signal pass-through for high-speed timing-critical buses. |
| Cio(OFF) (Typ) | 4 pF - Reduces capacitive loading on upstream drivers and preserves signal edge integrity in multi-drop configurations. |
| Ioff (Max) | 1 µA at VCC = 0 V - Ensures robust isolation during system power sequencing or hot-swap events. |
| VI/O Range | 0 V to 5.5 V - Supports mixed-voltage signaling (e.g., 3.3 V core interfacing to 5 V peripherals) with no external clamping. |
| fOE (Max) | 20 MHz - Allows dynamic enable/disable control at rates compatible with burst-mode memory or packetized I/O protocols. |
Pinout & Package
TSSOP-24 package (PW), 7.8 mm × 4.4 mm footprint, 1.2 mm max height, 0.65 mm lead pitch, RoHS-compliant NiPdAu finish, MSL Level-1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Independent output-enable controls | Active-low enables for respective 5-bit switch banks; tied to VCC via pull-up for power-up high-impedance safety. |
| 1A1–1A5, 2A1–2A5 | Input/output port A (side A) | Bidirectional data terminals; electrically identical to B-side ports with no direction pin required. |
| 1B1–1B5, 2B1–2B5 | Input/output port B (side B) | Paired with corresponding A pins; full rail-to-rail voltage translation supported between A and B sides. |
| GND | Ground reference | Single ground plane connection; decoupling capacitor placement adjacent to Pin 12 recommended per layout guidelines. |
| VCC | Supply voltage | 2.3–3.6 V digital supply; powers internal charge pump and logic; requires local 0.1 µF ceramic bypass near Pin 13. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail switching | Supports 0–5 V analog/digital signals with 3.3 V VCC - eliminates need for external level translators in mixed-voltage interconnects. |
| Charge-pump gate drive | Maintains flat 3 Ω ron across full VI/O range (0–5 V) and VCC range (2.3–3.6 V) - ensures consistent signal fidelity regardless of logic swing. |
| 5-V tolerant I/Os | Operates with VI/O up to 5.5 V while VCC is powered or unpowered - enables safe hot-plug and legacy peripheral interfacing. |
| Ioff partial-power-down | Blocks >99.9% of back-current (Ioff ≤1 µA) when VCC = 0 V - prevents damage during board-level power sequencing or firmware-initiated shutdown. |
| Low OFF-state capacitance | Cio(OFF) = 4 pF typical - minimizes crosstalk and timing skew in high-frequency parallel buses like address/data multiplexed paths. |
Applications
| PCI Interface | Differential Signal Interface |
|---|---|
|
Use Scenario: Isolating PCI bus segments during hot-swap or configuration changes in embedded computing chassis. IC Role / Device Role / Timing Role: Bidirectional bus switch providing sub-nanosecond signal gating between host controller and add-in card slots. Use Value: Prevents bus contention and signal reflection during insertion/removal while maintaining full 33 MHz PCI timing compliance. |
Use Scenario: Enabling/disabling LVDS or RSDS differential pairs in FPGA-based video routing matrices. IC Role / Device Role / Timing Role: Low-capacitance analog switch inserted in common-mode path to preserve differential impedance balance. Use Value: Adds <0.15 ns skew between P/N legs and introduces <0.05 dB insertion loss - meets SMPTE 292/424 jitter budgets. |
| Memory Interleaving | Bus Isolation |
|
Use Scenario: Dynamically routing address/data lines between dual DDR2 SDRAM banks in real-time memory controllers. IC Role / Device Role / Timing Role: High-bandwidth 10-bit switch acting as transparent signal bridge with zero added setup/hold time penalty. Use Value: Enables seamless bank switching at 400 MT/s with <10 ps jitter accumulation - critical for deterministic memory latency. |
Use Scenario: Electrically isolating debug JTAG/SWD traces from main application circuitry during production test. IC Role / Device Role / Timing Role: Controlled isolation element activated only during test mode to prevent interference with functional operation. Use Value: Provides >60 dB off-isolation at 100 MHz while adding <0.5 pF parasitic capacitance - avoids false trigger on boundary-scan clocks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FET bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CB3Q3306PW | 6-bit configuration (vs. 10-bit); identical ron (3 Ω), Cio(OFF) (4 pF), and VCC range (2.3–3.6 V). | Suitable for narrower data paths (e.g., I²C/SPI control lines), not 10-bit memory or PCI buses. | Select when pin count and signal count are reduced; shares same TSSOP-16 footprint but incompatible pinout. |
| SN74CBTLV3384PW | Lower VCC min (2.3 V → 2.5 V); higher ron (5 Ω typ); no charge pump - ron varies with VI/O. | Acceptable for lower-speed (<100 MHz) applications where cost is prioritized over flat ron performance. | Choose for cost-sensitive designs where 5 Ω ron variation and 0.3 ns tpd penalty are acceptable trade-offs. |
Compared with SN74CB3Q3384APW, SN74CB3Q3306PW reduces channel count but retains identical high-speed analog switching fidelity, while SN74CBTLV3384PW trades bandwidth and ron flatness for lower unit cost in non-critical signal paths.
Availability
SN74CB3Q3384APW is available at Aetrix Electronics and suitable for PCI interface design, memory interleaving architectures, and bus isolation circuits requiring stable component supply and long-term industrial lifecycle support.
Supply support for SN74CB3Q3384APW 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 connectivity technologies, with decades of expertise in high-speed interface solutions.
The SN74CB3Q3384APW belongs to TI's CB3Q family of high-bandwidth FET bus switches, engineered specifically for broadband communications, networking infrastructure, and data-intensive computing systems demanding minimal signal distortion.
FAQ
What is the maximum operating frequency supported by the SN74CB3Q3384APW?
The SN74CB3Q3384APW supports up to 500 MHz signal bandwidth on its data paths and allows OE control toggling at up to 20 MHz. These values reflect its optimized FET architecture and low 3 Ω ron, making SN74CB3Q3384APW suitable for high-speed parallel bus applications such as PCI and memory addressing without signal degradation.
Does the SN74CB3Q3384APW support 5-V tolerant I/Os when unpowered?
Yes, the SN74CB3Q3384APW maintains 5-V tolerance on all I/O pins (A and B ports) even when VCC = 0 V, thanks to integrated clamp diodes and Ioff protection. This ensures safe interfacing with 5 V peripherals during power-down states - a verified behavior documented in the absolute maximum ratings and Ioff electrical characteristics tables for SN74CB3Q3384APW.
Can the SN74CB3Q3384APW be used for analog signal switching?
Yes, the SN74CB3Q3384APW is explicitly characterized for analog applications including low-distortion signal gating. Its rail-to-rail operation (0–5 V), flat 3 Ω ron, and low 4 pF OFF-state capacitance preserve analog waveform integrity - confirmed in TI's SCDA008 application report and SN74CB3Q3384APW datasheet AC performance graphs.
What is the thermal resistance (θJA) of the SN74CB3Q3384APW in its TSSOP-24 package?
The SN74CB3Q3384APW in the PW (TSSOP-24) package has a specified junction-to-ambient thermal resistance (θJA) of 88 °C/W under standard JEDEC conditions. This value is measured with a 1-inch² copper pad and is critical for thermal design validation when operating at ICC = 2 mA max under continuous switching loads.
How does the charge pump in the SN74CB3Q3384APW improve performance compared to standard FET switches?
The integrated charge pump in SN74CB3Q3384APW elevates the gate voltage of the pass transistors above VCC, ensuring strong enhancement-mode conduction across the full 0–5 V input range. This delivers flat 3 Ω ron versus the voltage-dependent ron (>6 Ω) seen in non-pumped alternatives like SN74CBTLV3384PW - directly improving signal fidelity and timing predictability in SN74CB3Q3384APW applications.
SN74CB3Q3384APW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CB
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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-TSSOP
SN74CB3Q3384APW FAQ
1.How can I place an order for SN74CB3Q3384APW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74CB3Q3384APW 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 SN74CB3Q3384APW reliable?
The price and inventory of SN74CB3Q3384APW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74CB3Q3384APW is usually 5 days.
3.What payment methods are accepted for SN74CB3Q3384APW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74CB3Q3384APW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74CB3Q3384APW?
SN74CB3Q3384APW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74CB3Q3384APW 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 SN74CB3Q3384APW?
For technical support, including SN74CB3Q3384APW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74CB3Q3384APW requirements.
6.How does Aetrix verify that SN74CB3Q3384APW is sourced from the original manufacturer or authorized distributors?
All SN74CB3Q3384APW 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 SN74CB3Q3384APW meets industry standards.
7.What is the process for return or replacement of SN74CB3Q3384APW?
All SN74CB3Q3384APW units undergo pre-shipment inspection (PSI). If there is an issue with SN74CB3Q3384APW, 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 SN74CB3Q3384APW part is unused and in its original packaging.
Return procedure for SN74CB3Q3384APW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74CB3Q3384APW 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…
