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Texas Instruments SN74CB3Q3384APWR
- Part No.:
- SN74CB3Q3384APWR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74CB3Q3384APWR.pdf
- Description:
- IC BUS SWITCH 5 X 1:1 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
SN74CB3Q3384APWR from Texas Instruments is a 10-bit FET bus switch optimized for high-bandwidth, low-voltage (2.3 V–3.6 V) signal routing in digital systems. It features dual 5-bit channels with independent output-enable controls (1OE/2OE), 3 Ω typical ON-state resistance, <0.15 ns propagation delay, and 5-V-tolerant I/Os supporting rail-to-rail switching - enabling use in PCI interface isolation and memory interleaving applications.
For engineers reviewing the SN74CB3Q3384APWR datasheet, SN74CB3Q3384APWR pinout, SN74CB3Q3384APWR application, or SN74CB3Q3384APWR equivalent, key selection criteria include its 24-pin TSSOP package, bidirectional zero-distortion signal gating, Ioff partial-power-down support, and compatibility with 2.5-V/3.3-V logic domains while interfacing with 0–5-V signaling levels.
Technical Context
The SN74CB3Q3384APWR implements a charge-pump-enhanced FET architecture to maintain flat, low ON-resistance (<8 Ω max) across input voltages from 0 V to 5.5 V and supply voltages from 2.3 V to 3.6 V. Its dual 5-bit structure allows independent channel control via 1OE and 2OE, supporting either two isolated 5-bit paths or one consolidated 10-bit path.
Each switch exhibits 4 pF typical OFF-state I/O capacitance and supports up to 500 MHz bandwidth with minimal signal distortion. The device integrates undershoot clamp diodes on all data/control inputs and meets JESD 78 Class II latch-up immunity (>100 mA), making it suitable for hot-swap and mixed-voltage system interconnects.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3 V to 3.6 V - enables operation in both 2.5-V and 3.3-V logic domains without level shifters. |
| ron (Typ) | 3 Ω - ensures minimal voltage drop and signal attenuation during active switching, critical for high-fidelity analog/digital signal routing. |
| tpd (Max) | 0.15 ns - delivers near-zero propagation delay for timing-critical applications like high-speed memory arbitration. |
| Cio(OFF) (Typ) | 4 pF - reduces capacitive loading on buses, preserving signal integrity and enabling >500 MHz small-signal bandwidth. |
| Ioff (Max) | 1 µA at VCC = 0 V - guarantees robust isolation during partial power-down, preventing backflow current in powered-off subsystems. |
| VI/O Range | 0 V to 5.5 V - supports interoperability between 1.8-V, 2.5-V, 3.3-V, and 5-V logic families without external voltage translation. |
| fOE (Max) | 20 MHz - defines maximum toggle rate of OE control inputs, sufficient for burst-mode bus enable/disable sequencing. |
Pinout & Package
TSSOP-24 (PW) package: 7.8 mm × 4.4 mm body, 0.65 mm pitch, 1.2 mm max height, exposed pad not present, RoHS-compliant NiPdAu lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Channel enable inputs | Active-low controls for independent 5-bit sections; tied high via pullup for power-up high-impedance safety. |
| 1A1–1A5, 2A1–2A5 | Data inputs (A-side) | Unidirectional control ports connected to source logic; accept 0–5.5 V signals regardless of VCC state. |
| 1B1–1B5, 2B1–2B5 | Data outputs (B-side) | Bidirectional switched ports; electrically identical to A-side, enabling transparent signal flow in either direction when enabled. |
| VCC | Supply rail | Single 2.3–3.6 V supply powers internal charge pump and logic; no separate VCCA/VCCB required. |
| GND | Ground reference | Common return for all I/Os and internal circuitry; must be low-impedance for optimal noise rejection. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail switching | Supports 0–5-V signal swing with 3.3-V VCC - eliminates need for external level translators in mixed-voltage buses. |
| Ioff partial-power-down | Blocks current flow when VCC = 0 V - enables safe insertion/removal in live backplanes and modular systems. |
| Charge-pump gate drive | Maintains low, flat ron across full VI/O range - preserves signal fidelity for both digital edges and analog waveforms. |
| Undershoot clamp diodes | Integrated protection on all I/Os - prevents damage from negative transients down to –1.8 V without external components. |
| Bidirectional zero-delay path | No internal logic or buffering - signal passes through with only FET Rds(on) and Cio effects, ideal for clock/data gating. |
Applications
| PCI Interface Isolation | Differential Signal Routing |
|---|---|
Use Scenario: Isolating legacy PCI slots from modern controller logic while maintaining signal integrity across 33 MHz bus timing. IC Role / Device Role / Timing Role: Bidirectional bus switch placed between PCI edge connector and bridge ASIC to decouple capacitance and prevent ground bounce. Use Value: 4 pF OFF-capacitance minimizes added bus loading; 0.15 ns tpd avoids skew accumulation in parallel data lanes. | Use Scenario: Gating LVDS or RSDS differential pairs during system power sequencing or test mode activation. IC Role / Device Role / Timing Role: Passive signal gate inserted in each leg of differential pair to enable/disable signal path without introducing common-mode imbalance. Use Value: Matched ron and Cio across A/B ports preserve differential impedance; 5-V tolerance accommodates termination voltage margins. |
| Memory Interleaving Control | Low-Distortion Analog Signal Gating |
Use Scenario: Dynamically routing address/data lines between two DDR memory banks controlled by separate memory controllers. IC Role / Device Role / Timing Role: Dual-channel bus switch configured as 10-bit path, with 1OE/2OE synchronized to bank-select strobes. Use Value: Flat ron vs. VI ensures consistent timing across full 0–3.3 V address swing; Ioff prevents leakage during bank disable. | Use Scenario: Enabling/disabling audio or sensor analog signals in battery-powered IoT nodes using ultra-low-quiescent control. IC Role / Device Role / Timing Role: Analog switch element in signal chain, leveraging rail-to-rail capability to pass ±2.5 V audio peaks without clipping. Use Value: 3 Ω ron introduces <0.1% gain error at 10 kΩ load; 4 pF Cio avoids high-frequency roll-off in 20 kHz bandwidth paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FET bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBTLV3384PWR | Lower VCC range (2.3–3.6 V same), but ron = 4 Ω typ and Cio(OFF) = 5 pF - slightly higher loss and loading. | Same pinout and function; suited for cost-sensitive designs where 0.5 Ω ron margin is acceptable. | Select when BOM consolidation with CBTLV family is prioritized over absolute minimum ron. |
| PI3CHD3306ZLEX | 6-bit configuration (vs. 10-bit), ron = 3.5 Ω typ, supports 1.8-V VCC - broader voltage support but half the channel count. | Requires two devices for 10-bit coverage; better for 1.8-V native systems needing lower supply headroom. | Choose when migrating to 1.8-V core logic and board space permits dual placement. |
Compared with SN74CB3Q3384APWR, SN74CBTLV3384PWR trades marginal ron/Cio degradation for cross-family compatibility, while PI3CHD3306ZLEX offers 1.8-V operation at the cost of channel density and requires layout duplication for 10-bit coverage.
Availability
SN74CB3Q3384APWR is available at Aetrix Electronics and suitable for PCI interface isolation, memory interleaving control, and low-distortion analog signal gating requiring stable component supply across industrial temperature ranges (–40°C to 85°C).
Supply support for SN74CB3Q3384APWR 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, precision, and power efficiency.
The SN74CB3Q3384APWR belongs to TI's CB3Q family of high-bandwidth FET bus switches, engineered specifically for low-latency, low-distortion signal routing in broadband communications, networking infrastructure, and high-speed computing interconnects.
FAQ
What is the maximum operating frequency supported by the SN74CB3Q3384APWR?
The SN74CB3Q3384APWR supports up to 500 MHz small-signal bandwidth due to its low 4 pF OFF-state I/O capacitance and 3 Ω typical ON-resistance. This enables clean transmission of fast digital edges and high-frequency analog signals without significant attenuation or phase shift - verified under 3.3-V VCC and 25°C conditions per TI SCDS114D characterization.
Does the SN74CB3Q3384APWR require external pull-up resistors on OE pins?
Yes - to ensure high-impedance state during power-up or power-down, OE pins (1OE and 2OE) must be tied to VCC via external pull-up resistors. The minimum resistor value depends on the driver's current-sinking capability; TI recommends evaluating against the control input clamp current rating (±50 mA) and system noise margin requirements for reliable initialization of SN74CB3Q3384APWR.
Can the SN74CB3Q3384APWR safely interface between 1.8-V and 5-V logic domains?
Yes - the SN74CB3Q3384APWR supports 0–5.5 V signaling on all I/O ports regardless of VCC (2.3–3.6 V), enabling direct connection between 1.8-V, 2.5-V, 3.3-V, and 5-V logic families. Its 5-V-tolerant I/Os eliminate level shifters in mixed-voltage systems, and undershoot clamp diodes protect against –1.8 V transients - confirmed in Absolute Maximum Ratings and Electrical Characteristics tables for SN74CB3Q3384APWR.
What is the thermal performance of the SN74CB3Q3384APWR in its TSSOP-24 package?
The SN74CB3Q3384APWR in PW (TSSOP-24) package has a junction-to-ambient thermal resistance (θJA) of 88°C/W under standard JEDEC PCB mounting conditions. With typical ICC of 1–2 mA and worst-case power dissipation below 100 mW, this allows operation up to 85°C ambient without forced cooling - validated per TI's thermal characterization in SCDS114D and Package Option Addendum documentation for SN74CB3Q3384APWR.
How does the Ioff feature of the SN74CB3Q3384APWR protect downstream circuitry during partial power-down?
The Ioff feature in SN74CB3Q3384APWR disables current flow between A and B ports when VCC = 0 V, limiting leakage to ≤1 µA. This prevents damaging back-current from powered sections into unpowered subsystems - critical for hot-plug architectures and modular systems. The isolation behavior is guaranteed across full VI/O range (–0.5 V to 7 V) and complies with JESD 78 Class II latch-up immunity, ensuring robustness in SN74CB3Q3384APWR-based designs.
SN74CB3Q3384APWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CB
- Package/Case:
- 24-TSSOP (0.173", 4.40mm 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-TSSOP
SN74CB3Q3384APWR FAQ
1.How can I place an order for SN74CB3Q3384APWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74CB3Q3384APWR 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 SN74CB3Q3384APWR reliable?
The price and inventory of SN74CB3Q3384APWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74CB3Q3384APWR is usually 5 days.
3.What payment methods are accepted for SN74CB3Q3384APWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74CB3Q3384APWR transactions.
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4.How is shipping managed for SN74CB3Q3384APWR?
SN74CB3Q3384APWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74CB3Q3384APWR 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 SN74CB3Q3384APWR?
For technical support, including SN74CB3Q3384APWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74CB3Q3384APWR requirements.
6.How does Aetrix verify that SN74CB3Q3384APWR is sourced from the original manufacturer or authorized distributors?
All SN74CB3Q3384APWR 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 SN74CB3Q3384APWR meets industry standards.
7.What is the process for return or replacement of SN74CB3Q3384APWR?
All SN74CB3Q3384APWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74CB3Q3384APWR, 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 SN74CB3Q3384APWR part is unused and in its original packaging.
Return procedure for SN74CB3Q3384APWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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