My Inquiry
My Account
Texas Instruments CY74FCT2245ATPWR
- Part No.:
- CY74FCT2245ATPWR
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
CY74FCT2245ATPWR.pdf
- Description:
- IC TXRX NON-INVERT 5.25V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,685
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CY74FCT2245ATPWR from Texas Instruments is an 8-bit noninverting bidirectional transceiver with 3-state outputs, designed for bus interface applications requiring TTL-compatible logic levels, 4.6 ns max propagation delay (tPLH/tPHL), 25-Ω integrated output series resistors, and Ioff partial-power-down support. It operates across –40°C to 85°C and delivers 12 mA sink / 15 mA source drive at 5 V.
For engineers reviewing the CY74FCT2245ATPWR datasheet, CY74FCT2245ATPWR pinout, CY74FCT2245ATPWR application, or CY74FCT2245ATPWR equivalent, key selection criteria include direction control via T/R input, OE-gated 3-state operation, edge-rate-controlled noise suppression, and compatibility with legacy FCT/F logic designs in space-constrained TSSOP-20 layouts.
Technical Context
This device implements dual-port bidirectional data flow controlled by a single active-high T/R signal: high enables A→B transmission, low enables B→A reception. Output-enable (OE) is active-low and forces both ports into high-impedance when asserted.
It integrates on-die 25-Ω series termination at each output to dampen transmission-line reflections, features edge-rate control circuitry that limits slew rate without external components, and includes Ioff protection enabling safe back-drive during partial power-down-critical for hot-swap and mixed-voltage system interoperability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | Max 4.6 ns (tPLH/tPHL); ensures timing compliance in 50–100 MHz bus systems with tight setup/hold margins. |
| Output Drive | 12 mA sink / 15 mA source at VCC = 5 V; sufficient to drive standard TTL loads and stubbed PCB traces. |
| Supply Voltage | 4.75–5.25 V; tightly regulated 5 V rail required for guaranteed logic level compatibility and noise margin. |
| Input Logic Levels | VIH = 2 V min, VIL = 0.8 V max; fully compatible with TTL input thresholds and robust against ground bounce. |
| Output Series Resistance | 20–40 Ω (typ 25 Ω); reduces ringing and EMI on unterminated transmission lines without external resistors. |
| Ioff Current | ±1 µA at VCC = 0 V, VOUT = 4.5 V; prevents damaging current flow when powered down while other system rails remain active. |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM; exceeds JEDEC JESD22 standards for board-level handling and assembly. |
Pinout & Package
TSSOP-20 (PW) package: 4.4 mm × 6.5 mm body, 0.65 mm pitch, 1.2 mm max height, moisture sensitivity level 1 (260°C reflow unlimited), RoHS-compliant NiPdAu lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (T/R) | Transmit/Receive Control | Active-high signal selecting A→B data flow; active-low enabling B→A flow-defines real-time bus directionality. |
| 2–9 (A0–A7) | Port A Data I/O | Bidirectional TTL-compatible inputs/outputs; connected to local subsystem or microcontroller data bus. |
| 10 (GND) | Ground Reference | Primary return path for all I/O and supply currents; must be low-inductance connection to minimize noise coupling. |
| 11 (VCC) | Power Supply | 5 V ±5% supply input; requires local 0.1 µF ceramic decoupling adjacent to pin for stable switching operation. |
| 12 (OE) | Output Enable | Active-low control disabling both A and B ports simultaneously into high-impedance state-essential for bus arbitration. |
| 13–20 (B0–B7) | Port B Data I/O | Bidirectional TTL-compatible inputs/outputs; interfaces to external memory, peripheral, or secondary processor bus. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25-Ω output series resistors | Eliminates need for 16 discrete termination resistors, reducing BOM count, PCB area, and signal integrity tuning effort. |
| Edge-rate controlled outputs | Guarantees controlled slew rate without external RC networks-reducing crosstalk and radiated emissions in dense layouts. |
| Ioff partial-power-down protection | Enables safe insertion/removal in live backplanes and prevents latch-up when VCC is off but I/O pins see voltage from other powered domains. |
| FCT/F logic family compatibility | Pinout- and function-matched with CY74FCT245T and 74F245, allowing drop-in replacement in existing designs without layout changes. |
| TTL-input compatible thresholds | Accepts standard TTL VIH/VIL levels (2.0 V/0.8 V), ensuring interoperability with legacy 74LS/74ALS devices without level-shifting. |
Applications
| Industrial PLC Backplane Interface | Automotive Body Control Module Bus Isolation |
|---|---|
|
Use Scenario: Bidirectional data exchange between CPU module and I/O expansion cards over a 20-cm, 50-Ω routed bus in a DIN-rail mounted controller. IC Role / Device Role / Timing Role: CY74FCT2245ATPWR acts as a direction-controlled bus transceiver, isolating voltage domains and suppressing reflection-induced glitches during high-speed polling cycles. Use Value: Integrated 25-Ω termination eliminates 16 external resistors per transceiver, reducing layer count and improving signal fidelity at 25 MHz clock rates. |
Use Scenario: Interfacing a 5 V MCU to multiple 5 V sensor clusters (door lock, lighting, HVAC) in a CAN gateway unit with strict EMC requirements. IC Role / Device Role / Timing Role: CY74FCT2245ATPWR provides isolated bidirectional data routing between MCU and peripheral buses, with edge-rate control minimizing radiated emissions in the 30–100 MHz band. Use Value: Ioff support allows safe MCU sleep mode entry while sensors remain powered-eliminating wake-up latency and preventing backfeed damage. |
| Legacy Test Equipment Bus Extension | Medical Diagnostic Instrument Data Multiplexing |
|
Use Scenario: Extending a vintage GPIB or ISA-style parallel bus from mainframe controller to modular instrument modules housed in separate chassis. IC Role / Device Role / Timing Role: CY74FCT2245ATPWR serves as a hot-pluggable bus repeater, translating and buffering signals across chassis boundaries with precise direction control. Use Value: Function and pinout compatibility with CY74FCT245T enables direct retrofit into decades-old test systems-no firmware or layout revision required. |
Use Scenario: Aggregating analog-to-digital conversion results from eight independent patient monitoring channels into a central processing unit within a portable ultrasound device. IC Role / Device Role / Timing Role: CY74FCT2245ATPWR manages time-multiplexed data handoff between ADC front-end ASICs and ARM-based host processor under strict low-power constraints. Use Value: 4.6 ns propagation delay ensures sub-10 ns timing alignment across all eight channels-critical for coherent beamforming calculations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74FCT245ATPWR | Same pinout, identical electrical specs, but lacks Ioff protection and has higher ICC (0.2 mA vs 0.1 mA typical). | Not suitable for partial-power-down or hot-swap systems where back-drive risk exists. | Select only if legacy design validation confirms no power sequencing dependencies and cost is primary constraint. |
| 74LVC245APW,118 | 3.3 V only (1.65–3.6 V), lower drive (24 mA sink), no integrated series resistors, different pinout (TSSOP-20 but non-compatible). | Requires level-shifting for 5 V systems; adds external termination and increases layout complexity. | Choose only for new 3.3 V-only designs prioritizing ultra-low static power (<1 µA ICC) over legacy compatibility. |
Compared with SN74FCT245ATPWR and 74LVC245APW,118, the CY74FCT2245ATPWR uniquely combines 5 V TTL compatibility, integrated termination, Ioff safety, and drop-in FCT245 replacement capability-making it the sole option for robust, maintainable upgrades of industrial and test equipment.
Availability
CY74FCT2245ATPWR is available at Aetrix Electronics and suitable for industrial PLC backplane interfaces, automotive body control modules, legacy test equipment upgrades, and medical diagnostic data multiplexing requiring stable component supply and long-term lifecycle assurance.
Supply support for CY74FCT2245ATPWR 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, longevity, and industrial-grade performance.
The CY74FCT2245ATPWR belongs to TI's Fast CMOS Technology (FCT) logic family, engineered specifically for high-noise industrial and instrumentation environments where signal integrity, bus contention immunity, and mixed-voltage interoperability are critical.
FAQ
What is the maximum operating temperature range for the CY74FCT2245ATPWR?
The CY74FCT2245ATPWR is rated for continuous operation from –40°C to +85°C ambient temperature. This industrial temperature grade ensures reliable performance in demanding environments such as factory automation controllers, automotive under-hood modules, and portable medical equipment-without derating or thermal throttling.
Does the CY74FCT2245ATPWR support hot-swap or partial-power-down operation?
Yes, the CY74FCT2245ATPWR includes Ioff circuitry that limits current to ±1 µA when VCC = 0 V and I/O pins are biased up to 4.5 V. This enables safe insertion into live backplanes and supports partial-power-down modes in multi-rail systems-preventing latch-up and back-drive damage during power sequencing events.
Can the CY74FCT2245ATPWR replace the CY74FCT245T in an existing design?
Yes, the CY74FCT2245ATPWR is functionally and pinout-compatible with the CY74FCT245T and offers identical 4.6 ns propagation delay, 12 mA/15 mA drive, and TTL logic level compatibility. Its added 25-Ω output resistors and edge-rate control provide improved noise immunity-making it a direct, enhanced drop-in replacement.
What is the purpose of the 25-Ω output series resistance in the CY74FCT2245ATPWR?
The 25-Ω on-die series resistance in the CY74FCT2245ATPWR damps high-frequency reflections on unterminated PCB traces, significantly reducing ringing, overshoot, and EMI. This eliminates the need for 16 discrete 25-Ω resistors per device-simplifying layout, lowering BOM cost, and improving signal integrity on 50-Ω or 75-Ω routed buses up to 25 MHz.
Is the CY74FCT2245ATPWR RoHS-compliant and what is its moisture sensitivity level?
Yes, the CY74FCT2245ATPWR is RoHS-compliant (lead-free, NiPdAu finish) and carries MSL Level-1 (260°C, unlimited floor life). Its TSSOP-20 (PW) package is qualified for standard reflow profiles without baking-supporting high-yield, lead-free manufacturing for industrial and medical applications requiring full environmental compliance.
CY74FCT2245ATPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 15mA, 12mA
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
CY74FCT2245ATPWR FAQ
1.How can I place an order for CY74FCT2245ATPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT2245ATPWR 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 CY74FCT2245ATPWR reliable?
The price and inventory of CY74FCT2245ATPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT2245ATPWR is usually 5 days.
3.What payment methods are accepted for CY74FCT2245ATPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT2245ATPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT2245ATPWR?
CY74FCT2245ATPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT2245ATPWR 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 CY74FCT2245ATPWR?
For technical support, including CY74FCT2245ATPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT2245ATPWR requirements.
6.How does Aetrix verify that CY74FCT2245ATPWR is sourced from the original manufacturer or authorized distributors?
All CY74FCT2245ATPWR 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 CY74FCT2245ATPWR meets industry standards.
7.What is the process for return or replacement of CY74FCT2245ATPWR?
All CY74FCT2245ATPWR units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT2245ATPWR, 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 CY74FCT2245ATPWR part is unused and in its original packaging.
Return procedure for CY74FCT2245ATPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY74FCT2245ATPWR Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
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…
