My Inquiry
My Account
Nexperia USA Inc. CBT3244APW,134
- Part No.:
- CBT3244APW,134
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
CBT3244APW,134.pdf
- Description:
- IC BUS SWITCH 4 X 1:1 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,624
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CBT3244APW from Nexperia is an octal bus switch with dual 4-bit low-impedance bidirectional switches, TTL-compatible control inputs, 5 Ω typical ON-state resistance, <0.25 ns propagation delay, and operation from –40 °C to +85 °C. It enables high-speed data routing in memory address/data buses and peripheral interface isolation.
For engineers reviewing the CBT3244APW datasheet, CBT3244APW pinout, CBT3244APW application, or CBT3244APW equivalent, this device supports fast bidirectional signal pass-through with independent quad-output enable control, low capacitive loading (3 pF), and robust ESD protection (2000 V HBM).
Technical Context
The CBT3244APW implements two independent 4-bit analog bus switches, each controlled by a dedicated active-low output-enable input (1OE, 2OE). Its TTL-compatible logic thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) allow direct interfacing with legacy 5 V logic families without level translation.
Each switch path exhibits near-symmetric conduction (Ron = 4–7 Ω at 4.5 V, 64 mA), enabling bidirectional signal flow with minimal voltage drop and distortion. The device operates exclusively from a single 4.5–5.5 V supply and draws only 1 μA typical quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ON-state resistance | 4–7 Ω at 4.5 V/64 mA - ensures <50 mV voltage drop under full load, preserving signal integrity in 5 V systems |
| Propagation delay | <0.25 ns - enables sub-nanosecond timing-critical bus switching for high-speed memory and I/O interfaces |
| Enable/disable time | 1.0–6.0 ns - guarantees rapid channel isolation during bus arbitration or power sequencing |
| Input capacitance | 3 pF on control pins - minimizes loading on driving logic and reduces dynamic power consumption |
| ESD protection | 2000 V HBM - meets industrial-grade robustness requirements without external protection components |
| Supply voltage range | 4.5–5.5 V - compatible with standard 5 V TTL and CMOS rails, no regulation required |
| Operating temperature | –40 °C to +85 °C - qualified for extended industrial environments including factory automation and telecom infrastructure |
Pinout & Package
TSSOP20 package (SOT360-1): 20-pin thin shrink small outline, 4.4 mm body width, 0.65 mm pitch, exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low enable inputs controlling respective 4-bit switch banks; drive HIGH to isolate ports |
| 2, 4, 6, 8, 11, 13, 15, 17 | 1A1–1A4, 2A1–2A4 | Switch input terminals - bidirectional ports accepting signals from either side when enabled |
| 3, 5, 7, 9, 12, 14, 16, 18 | 1B1–1B4, 2B1–2B4 | Switch output terminals - electrically identical to A-side; no fixed directionality |
| 10 | GND | Ground reference for all internal circuitry and signal return path |
| 20 | VCC | Single 4.5–5.5 V supply rail powering switch transistors and control logic |
Key Features
| Feature | Design Value |
|---|---|
| Standard '244-type pinout | Direct drop-in replacement for legacy 74LS244/74HC244 in existing PCB layouts without redesign |
| 5 Ω typical Ron | Enables <50 mV IR drop at 10 mA, preserving TTL logic margins across loaded backplanes |
| Latch-up immunity | Exceeds 500 mA per JESD78 - prevents destructive latch-up during hot-swap or transient overvoltage events |
| Bidirectional signal flow | No internal direction control needed - simplifies firmware and eliminates directional configuration overhead |
| Low ICC quiescent current | 1 μA typical - supports always-on monitoring paths without impacting system power budget |
Applications
| Memory Address Bus Isolation | Peripheral Interface Multiplexing |
|---|---|
|
Use Scenario: Isolating CPU address lines from multiple memory banks to prevent contention during bank switching. IC Role / Device Role / Timing Role: Bidirectional analog switch enabling/disabling address signal paths with sub-ns timing precision. Use Value: Eliminates need for discrete resistors or buffers while maintaining <0.25 ns skew between parallel address bits. |
Use Scenario: Sharing a single UART or SPI interface among multiple sensors via time-division multiplexing. IC Role / Device Role / Timing Role: Low-Ron analog gate routing serial data and control signals between host and selected peripheral. Use Value: Achieves <5 Ω channel resistance and 3 pF capacitance, preserving signal rise/fall times up to 100 Mbps. |
| Legacy Logic Level Translation | Hot-Swap Backplane Interface |
|
Use Scenario: Interfacing 5 V microcontrollers with 3.3 V peripherals where level shifters introduce unacceptable delay. IC Role / Device Role / Timing Role: Passive analog switch operating within TTL voltage thresholds, avoiding active translation latency. Use Value: Supports direct 5 V ↔ 3.3 V signal pass-through with VIH/VIL compatibility and no DC bias dependency. |
Use Scenario: Enabling safe insertion/removal of daughter cards in modular industrial controllers without disrupting main bus. IC Role / Device Role / Timing Role: High-ESD-tolerance switch isolating card-specific signals from shared backplane during plug/unplug events. Use Value: 2000 V HBM rating and 500 mA latch-up immunity prevent damage during contact bounce or power sequencing mismatches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBTD3384PWR | Higher Ron (7–10 Ω), wider supply range (2.3–3.6 V or 4.5–5.5 V), higher ICC (10 μA) | Optimized for mixed-voltage 3.3 V/5 V systems; less suitable for pure 5 V legacy designs | Choose when dual-supply flexibility or lower-voltage support is required; avoid if minimizing propagation delay is critical |
| 74LVC244APW | Non-analog buffer (digital output), higher output drive (24 mA), no bidirectional capability, 3.3 V only | Provides level-shifting and drive strength but cannot pass analog or bidirectional signals | Use only for unidirectional digital buffering; not a functional substitute for bus switching or analog signal routing |
Compared with SN74CBTD3384PWR and 74LVC244APW, the CBT3244APW delivers the lowest propagation delay (<0.25 ns) and true bidirectional analog switching in a pin-compatible '244 footprint, making it optimal for high-speed legacy 5 V bus isolation where signal fidelity and timing predictability are essential.
Availability
CBT3244APW is available at Aetrix Electronics and suitable for memory bus isolation, peripheral multiplexing, legacy logic interfacing, and hot-swap backplane applications requiring stable component supply and long-term industrial lifecycle support.
Supply support for CBT3244APW 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
Nexperia is a global semiconductor expert specializing in high-performance, high-reliability logic, analog, and discrete components for industrial, automotive, and computing markets.
The CBT3244A belongs to Nexperia's advanced bus switch product line, engineered specifically for low-latency, low-distortion signal routing in legacy 5 V digital systems where timing integrity and pin compatibility are critical.
FAQ
Is the CBT3244APW suitable for bidirectional analog signal switching?
Yes. The CBT3244APW is a true analog bus switch with symmetric ON-state resistance (4–7 Ω) and no internal directionality. It passes analog or digital signals bidirectionally between A and B ports when enabled, supporting applications like audio routing or sensor sharing where signal polarity must be preserved.
What is the maximum capacitive load the CBT3244APW can drive while maintaining specified timing?
The CBT3244APW's 0.25 ns propagation delay is characterized with a 50 pF load. Its 3 pF input/output capacitance ensures minimal added loading, and the device reliably drives up to 50 pF total load (including trace and destination capacitance) without exceeding timing specifications or degrading edge rates in 5 V systems.
Can CBT3244APW operate at 3.3 V supply?
No. The CBT3244APW is specified only for 4.5–5.5 V operation. At 3.3 V, its ON-state resistance rises significantly (>15 Ω), enable thresholds become unreliable, and ESD performance degrades. For 3.3 V systems, consider the SN74CBTD3384 or NX3DV384 instead.
Does the TSSOP20 package (SOT360-1) include an exposed thermal pad?
No. Unlike the DHVQFN20 variant (SOT764-1), the CBT3244APW in TSSOP20 (SOT360-1) has no exposed thermal pad. Thermal dissipation relies solely on leadframe conduction through the 20 gull-wing leads; junction-to-ambient θJA is 110 °C/W per datasheet characterization.
CBT3244APW,134 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74CBT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Bus Switch
- Circuit:
- 4 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:
- 20-TSSOP
CBT3244APW,134 FAQ
1.How can I place an order for CBT3244APW,134 through Aetrix?
Please submit a Request for Quotation (RFQ) for CBT3244APW,134 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 CBT3244APW,134 reliable?
The price and inventory of CBT3244APW,134 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CBT3244APW,134 is usually 5 days.
3.What payment methods are accepted for CBT3244APW,134?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CBT3244APW,134 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CBT3244APW,134?
CBT3244APW,134 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CBT3244APW,134 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 CBT3244APW,134?
For technical support, including CBT3244APW,134 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CBT3244APW,134 requirements.
6.How does Aetrix verify that CBT3244APW,134 is sourced from the original manufacturer or authorized distributors?
All CBT3244APW,134 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 CBT3244APW,134 meets industry standards.
7.What is the process for return or replacement of CBT3244APW,134?
All CBT3244APW,134 units undergo pre-shipment inspection (PSI). If there is an issue with CBT3244APW,134, 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 CBT3244APW,134 part is unused and in its original packaging.
Return procedure for CBT3244APW,134:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CBT3244APW,134 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
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…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
