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NXP Semiconductors CBTS3384DK,118
- Part No.:
- CBTS3384DK,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
CBTS3384DK,118.pdf
- Description:
- IC BUS SWITCH 5 X 1:1 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,232
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Product details
Overview
CBTS3384DK,118 from NXP (formerly Philips Semiconductors) is a 10-bit TTL-compatible bus switch with dual 5-bit sections, 5 Ω on-resistance, 250 ps propagation delay at 5 V, and Schottky undershoot protection. It operates from -40 to +85 °C and is used in high-speed data routing between microcontroller buses and peripheral interfaces.
For engineers reviewing the CBTS3384DK,118 datasheet, CBTS3384DK,118 pinout, CBTS3384DK,118 application, or CBTS3384DK,118 equivalent, key selection criteria include output-enable timing (tPZH/tPLZ ≤ 6 ns), low-capacitance switching (CIN = 4 pF, COUT = 10 pF), and latch-up immunity (>500 mA).
Technical Context
The CBTS3384DK,118 implements two independent 5-bit bidirectional bus switches, each controlled by a dedicated OE input (1OE and 2OE). Its low on-resistance (5–7 Ω) enables minimal signal degradation across 50 pF loads, supporting sub-nanosecond timing integrity.
It features Schottky-clamped inputs/outputs for undershoot protection, TTL-compatible logic thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V), and full 5.5 V absolute maximum supply rating - enabling robust operation in mixed-voltage 5 V systems with transient resilience.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-resistance (ron) | 5–7 Ω typical; ensures <10 mV voltage drop at 30 mA, preserving signal swing in 5 V TTL buses |
| Propagation delay (tPD) | 250 ps max at CL = 50 pF; supports >1 GHz data rate feasibility in short trace applications |
| Output enable/disable time | 1.0–6.6 ns; allows precise timing control for burst-mode memory or FIFO interfacing |
| Input/output capacitance | CIN = 4 pF, COUT = 10 pF; minimizes loading on driving sources and downstream receivers |
| Supply voltage range | 4.5–5.5 V; compatible with standard 5 V ±5% industrial power rails |
| Operating temperature | -40 to +85 °C; qualified for extended-temperature industrial and automotive under-hood control modules |
| ESD protection | 2000 V HBM / 200 V MM / 1000 V CDM; reduces risk of handling damage during assembly |
Pinout & Package
CBTS3384DK,118 is housed in a 24-pin plastic SSOP (QSOP) package per SOT556-1, measuring 3.9 mm body width with 0.635 mm lead pitch - optimized for high-density PCB layouts requiring thermal and electrical isolation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 13 | 1OE, 2OE | Active-low enables for respective 5-bit switch banks; decouples control timing between A/B port groups |
| 3,4,7,8,11 | 1A1–1A5 | Input terminals for first 5-bit switch bank; TTL-compatible, Schottky-clamped |
| 14,17,18,21,22 | 2A1–2A5 | Input terminals for second 5-bit switch bank; electrically isolated from 1A group |
| 2,5,6,9,10 | 1B1–1B5 | Output terminals for first 5-bit switch bank; bidirectional when enabled |
| 15,16,19,20,23 | 2B1–2B5 | Output terminals for second 5-bit switch bank; independent high-impedance state control |
| 12 | GND | Signal reference ground; shared return path for all switch channels |
| 24 | VCC | +5 V supply; powers internal clamp diodes and switch transistors |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 5-bit switch banks | Enables concurrent routing of two separate data paths (e.g., address/data split) without crosstalk |
| 5 Ω typical on-resistance | Maintains signal integrity across 50 pF loads with <0.15 UI jitter contribution at 100 MHz |
| Schottky undershoot protection | Clamps negative transients to -1.2 V, preventing shoot-through in fast edge-rate 5 V systems |
| Latch-up immunity >500 mA | Guarantees robustness against ESD-induced latch-up in uncontrolled board environments |
| TTL-compatible I/O levels | Direct interface with legacy 74LS/74ALS logic without level-shifting circuitry |
Applications
| Microcontroller Bus Expansion | Memory Interfacing |
|---|---|
Use Scenario: Expanding GPIO or address/data bus lines from an MCU to multiple peripherals (e.g., ADC, DAC, EEPROM) without contention. IC Role / Device Role / Timing Role: Bidirectional bus switch providing low-latency, high-impedance isolation between MCU and peripheral address/data lanes. Use Value: Enables dynamic bus sharing with 250 ps propagation delay and no added setup/hold timing burden. | Use Scenario: Isolating SRAM or Flash memory data buses during read/write arbitration in multi-master systems. IC Role / Device Role / Timing Role: Dual 5-bit switch acting as direction-controlled data path gate between memory controller and memory device. Use Value: Prevents bus contention during memory access handoff using independent OE controls for read vs. write paths. |
| FPGA I/O Bridging | Legacy Logic Interface |
Use Scenario: Connecting FPGA I/O banks operating at 5 V TTL levels to external sensors or actuators with strict noise margins. IC Role / Device Role / Timing Role: Signal-level translator and transient protector between FPGA core logic and noisy industrial I/O. Use Value: Schottky clamping suppresses undershoot below -1.2 V, eliminating false triggering in 5 V sensor interfaces. | Use Scenario: Integrating vintage 74-series logic into modern 5 V control systems where bus loading must be minimized. IC Role / Device Role / Timing Role: Low-capacitance (4 pF input) buffer and isolation element for TTL fan-out extension. Use Value: Reduces cumulative capacitive loading on legacy drivers while maintaining sub-ns timing alignment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT3384CPWR | Same 10-bit dual-OE architecture; 4.5–5.5 V supply; 6 Ω ron; 275 ps tPD; TI packaging (TSSOP) | Identical functional behavior but different thermal resistance (θJA = 120 °C/W vs. 135 °C/W for CBTS3384DK,118) | Preferred for higher ambient temperature operation due to lower junction-to-ambient thermal resistance |
| 74LVC1G3157GW,125 | Single-pole double-throw analog switch; 1.65–5.5 V; 10 Ω ron; 4 ns tPD; only 2-channel | Not scalable to 10-bit; lacks dual-OE control; suitable only for point-to-point signal routing, not bus-wide switching | Select only for low-pin-count, single-signal isolation where bus-width expansion is unnecessary |
Compared with SN74CBT3384CPWR and 74LVC1G3157GW,125, the CBTS3384DK,118 delivers superior timing performance (250 ps vs. 275 ps/4 ns), tighter on-resistance tolerance (5–7 Ω vs. 6 Ω typ/10 Ω), and native QSOP packaging for space-constrained industrial PCBs.
Availability
CBTS3384DK,118 is available at Aetrix Electronics and suitable for microcontroller bus expansion, memory interfacing, FPGA I/O bridging, and legacy logic interface applications requiring stable component supply and long-term industrial availability.
Supply support for CBTS3384DK,118 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
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Philips' pioneering logic portfolio.
The CBTS3384DK,118 belongs to NXP's legacy high-speed bus switch family, designed specifically for low-latency, high-reliability 5 V TTL bus isolation and expansion in industrial control and instrumentation systems.
FAQ
What is the maximum operating supply voltage for CBTS3384DK,118?
The CBTS3384DK,118 has an absolute maximum DC supply voltage (VCC) rating of +7.0 V, but its recommended operating range is strictly 4.5 V to 5.5 V. Operation outside this range may compromise timing accuracy, increase leakage current, or trigger latch-up. The CBTS3384DK,118 is not rated for 3.3 V-only operation and requires a stable 5 V rail to meet its specified 250 ps propagation delay and 5 Ω on-resistance.
Does CBTS3384DK,118 support bidirectional signal flow?
Yes, the CBTS3384DK,118 supports true bidirectional signal flow within each 5-bit channel - meaning signals can pass from A to B or B to A depending on which side drives the line, provided the corresponding OE is active low. This behavior is inherent to its passive FET-based switch architecture and is confirmed in the function table and logic symbol. The CBTS3384DK,118 does not require direction-control pins.
What is the purpose of Schottky undershoot protection in CBTS3384DK,118?
The Schottky undershoot protection in CBTS3384DK,118 clamps negative voltage excursions at inputs and outputs to -1.2 V (per VIK specification), preventing destructive shoot-through current when fast-rising edges encounter transmission-line reflections or inductive kickback. This feature directly enhances system reliability in high-speed 5 V bus environments and is integral to the CBTS3384DK,118's latch-up immunity specification (>500 mA).
Can CBTS3384DK,118 be used in 3.3 V systems?
No - the CBTS3384DK,118 is not characterized or guaranteed for 3.3 V operation. Its TTL-compatible input thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V) and 4.5–5.5 V recommended supply range require a nominal 5 V rail. Using it with 3.3 V logic may result in marginal or non-functional enable control, degraded on-resistance, and undefined timing behavior. The CBTS3384DK,118 must be powered from 5 V even when interfacing with 3.3 V devices via level-shifting circuitry.
What package type is used for CBTS3384DK,118?
The CBTS3384DK,118 uses a 24-pin plastic shrink small outline package (SSOP) with QSOP footprint, designated SOT556-1. It features a 3.9 mm body width and 0.635 mm lead pitch - distinct from wider SO (SOT137-1) and standard SSOP (SOT340-1) variants. This compact QSOP variant enables higher PCB density while maintaining compatibility with standard SSOP reflow profiles.
CBTS3384DK,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74CBTS
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SSOP
CBTS3384DK,118 FAQ
1.How can I place an order for CBTS3384DK,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for CBTS3384DK,118 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 CBTS3384DK,118 reliable?
The price and inventory of CBTS3384DK,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CBTS3384DK,118 is usually 5 days.
3.What payment methods are accepted for CBTS3384DK,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CBTS3384DK,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CBTS3384DK,118?
CBTS3384DK,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CBTS3384DK,118 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 CBTS3384DK,118?
For technical support, including CBTS3384DK,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CBTS3384DK,118 requirements.
6.How does Aetrix verify that CBTS3384DK,118 is sourced from the original manufacturer or authorized distributors?
All CBTS3384DK,118 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 CBTS3384DK,118 meets industry standards.
7.What is the process for return or replacement of CBTS3384DK,118?
All CBTS3384DK,118 units undergo pre-shipment inspection (PSI). If there is an issue with CBTS3384DK,118, 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 CBTS3384DK,118 part is unused and in its original packaging.
Return procedure for CBTS3384DK,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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