My Inquiry
My Account
Texas Instruments CAHCT244QPWRG4Q1
- Part No.:
- CAHCT244QPWRG4Q1
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
CAHCT244QPWRG4Q1.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,900
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CAHCT244QPWRG4Q1 from Texas Instruments is an automotive-grade octal buffer/driver with 3-state outputs, designed for bus-oriented signal routing in vehicle control modules. It features TTL-compatible inputs, ±8 mA output drive at 5 V, 7.4 ns typical propagation delay (CL = 15 pF), and operates across −40°C to +125°C. It enables/disables eight parallel digital signals in powertrain and body electronics.
For engineers reviewing the CAHCT244QPWRG4Q1 datasheet, CAHCT244QPWRG4Q1 pinout, CAHCT244QPWRG4Q1 application, or CAHCT244QPWRG4Q1 equivalent, this page delivers verified electrical specs, TSSOP-20 package details, functional mode behavior, automotive qualification evidence, and validated alternative options for AEC-Q100-compliant designs.
Technical Context
The CAHCT244QPWRG4Q1 implements two independent 4-bit non-inverting buffers, each controlled by a dedicated 3-state output-enable input (1OE, 2OE). Its EPIC™ CMOS process ensures TTL-level input compatibility while maintaining CMOS power efficiency and noise immunity.
Each buffer group drives up to ±8 mA per output under recommended conditions (VCC = 4.5–5.5 V), supports 15–50 pF load capacitance, and transitions between active and high-impedance states within 10 ns typical (tPZH/tPLZ). Input clamping and ESD protection exceed 1000 V HBM per MIL-STD-883.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures stable operation across automotive battery voltage transients. |
| IOH/IOL | ±8 mA - Sufficient drive strength to interface directly with standard CMOS/TTL loads without external buffering. |
| tPLH/tPHL | 7.4 ns typical (CL = 15 pF) - Enables reliable timing in 100+ MHz bus systems with margin. |
| VIH/VIL | 2.0 V / 0.8 V - Guarantees robust recognition of TTL logic levels across temperature and supply variation. |
| Operating Temp | −40°C to +125°C - Qualified per AEC-Q100 Grade 1 for under-hood and transmission control applications. |
| ESD Rating | ±1000 V HBM - Meets automotive ESD immunity requirements for assembly and field operation. |
| ICC (max) | 40 μA - Ultra-low quiescent current supports always-on subsystems with minimal standby power impact. |
Pinout & Package
TSSOP-20 package (PW), 6.50 mm × 6.40 mm body size, 1.2 mm max height, lead-free NiPdAu finish, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low 3-state enable inputs - Control respective 4-bit buffer groups independently; must be pulled high during power-up to avoid bus contention. |
| 2, 4, 6, 8, 11, 13, 15, 17 | 1A1–1A4, 2A1–2A4 | Buffer input pins - Accept TTL-compatible signals; unused inputs must be tied to VCC or GND to prevent floating-induced shoot-through. |
| 3, 5, 7, 9, 12, 14, 16, 18 | 2Y4–2Y1, 1Y4–1Y1 | Buffer output pins - Provide 3-state CMOS outputs with ±8 mA drive; high-impedance state isolates buses during reset or sleep modes. |
| 10 | GND | Ground reference - Requires low-inductance connection to system ground plane to minimize switching noise coupling. |
| 20 | VCC | Power supply - Must be decoupled with 0.1 μF ceramic capacitor placed ≤2 mm from pin to suppress high-frequency supply ripple. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Grade 1 (−40°C to +125°C) - Validated for automotive powertrain, chassis, and ADAS control units requiring long-term reliability. |
| TTL-compatible inputs | VIH = 2.0 V min, VIL = 0.8 V max - Eliminates need for level-shifting circuitry when interfacing with legacy microcontrollers and sensors. |
| Independent 3-state control | Dual OE inputs (1OE/2OE) - Allows selective enabling of two 4-bit data paths, supporting multiplexed bus architectures and partial system wake-up. |
| Low dynamic power | Cpd = 8.2 pF - Minimizes switching power dissipation in high-frequency clock distribution and address bus applications. |
| Enhanced ESD protection | ±1000 V HBM - Reduces risk of field failure due to handling or system-level ESD events in manufacturing and service environments. |
Applications
| Engine Control Unit (ECU) Signal Isolation | Body Control Module (BCM) Bus Interface |
|---|---|
Use Scenario: Isolating sensor data lines during ECU reset to prevent erroneous actuator commands. IC Role / Device Role / Timing Role: 3-state buffer enabling/disabling analog-to-digital converter (ADC) data bus segments during processor initialization. Use Value: Prevents bus contention and data corruption during cold start sequences, ensuring deterministic boot behavior per ISO 26262 ASIL-B requirements. | Use Scenario: Driving LIN or CAN transceiver enable signals from a low-drive MCU GPIO. IC Role / Device Role / Timing Role: Level-shifting and current-boosting buffer for microcontroller output pins controlling communication ICs. Use Value: Provides guaranteed 8 mA sink/source to meet transceiver input threshold specifications across full temperature range, eliminating marginal drive issues. |
| Instrument Cluster Display Multiplexing | ADAS Camera Interface Buffering |
Use Scenario: Selectively routing multiple display driver signals to shared segment drivers in TFT backlight control logic. IC Role / Device Role / Timing Role: Octal non-inverting buffer with dual OE control managing time-multiplexed PWM outputs to LED drivers. Use Value: Enables precise timing alignment of 8-channel PWM edges with <1 ns skew, critical for flicker-free illumination in automotive displays. | Use Scenario: Conditioning parallel video data lines (e.g., MIPI D-PHY LP mode signals) before FPGA capture. IC Role / Device Role / Timing Role: Low-skew, high-drive buffer preserving signal integrity on 8-bit parallel camera data bus between image sensor and SoC. Use Value: Maintains <7.4 ns propagation delay matching across all 8 channels, reducing inter-pair skew to <1 ns for error-free pixel sampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AHCT244QPWRQ1 | Same silicon, identical electrical specs, but uses standard TI marking (AHCT244Q) vs. G4 suffix marking. | No functional difference; both qualified to AEC-Q100 Grade 1 and share same PW package and thermal performance. | Select CAHCT244QPWRG4Q1 when G4 revision compliance (enhanced traceability, updated MSL documentation) is required per OEM sourcing policy. |
| SN74LVC244APWR | Lower VCC range (1.65–3.6 V), 24 mA drive, 3.8 ns tPD - not automotive-qualified; no AEC-Q100 certification. | Suitable only for non-safety-critical infotainment or telematics subsystems operating at 3.3 V. | Choose SN74LVC244APWR only for cost-sensitive 3.3 V designs where automotive qualification is unnecessary and higher speed is prioritized. |
Compared with SN74AHCT244QPWRQ1, CAHCT244QPWRG4Q1 offers identical functionality with enhanced documentation traceability; versus SN74LVC244APWR, it trades speed and voltage flexibility for mandatory automotive qualification, thermal robustness, and system-level ESD resilience.
Availability
CAHCT244QPWRG4Q1 is available at Aetrix Electronics and suitable for engine control units, body control modules, instrument clusters, and ADAS camera interfaces requiring stable component supply across extended temperature ranges and automotive lifecycle commitments.
Supply support for CAHCT244QPWRG4Q1 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 automotive electronics, with over 50 years of innovation in high-reliability components.
The SN74AHCT244-Q1 product line delivers AEC-Q100-qualified logic devices optimized for automotive signal routing, bus isolation, and interface conditioning in harsh-temperature environments.
FAQ
What is the maximum operating temperature for CAHCT244QPWRG4Q1?
The CAHCT244QPWRG4Q1 is rated for continuous operation from −40°C to +125°C, meeting AEC-Q100 Grade 1 requirements. This specification is validated across all electrical parameters in the datasheet's Recommended Operating Conditions table, including VCC = 4.5–5.5 V and IOL = 8 mA. The device's thermal resistance (RθJA = 116.8°C/W in PW package) supports this rating under typical PCB layout conditions with adequate copper pour.
Does CAHCT244QPWRG4Q1 support 3.3 V logic interfaces?
No, CAHCT244QPWRG4Q1 does not support reliable 3.3 V operation. Its VIH minimum is 2.0 V and VIL maximum is 0.8 V - specified only for VCC = 4.5–5.5 V. At 3.3 V supply, input thresholds become undefined and output drive falls outside guaranteed limits. For 3.3 V systems, consider SN74LVC244APWR instead, though it lacks automotive qualification.
How should unused inputs be handled on CAHCT244QPWRG4Q1?
All unused inputs on CAHCT244QPWRG4Q1 must be tied to either VCC or GND to prevent floating states that cause increased ICC, noise susceptibility, or erratic output behavior. TI's application report SCBA004 explicitly mandates this. Leaving inputs unconnected violates recommended operating conditions and may result in excessive current draw or metastability during temperature cycling.
Is CAHCT244QPWRG4Q1 pin-compatible with SN74AHCT244QPWRQ1?
Yes, CAHCT244QPWRG4Q1 is pin-compatible with SN74AHCT244QPWRQ1 - both use identical TSSOP-20 (PW) packaging, share the same pinout, thermal characteristics, and electrical specifications. The G4 suffix denotes a later revision with updated documentation, traceability, and MSL reporting, but no physical or functional changes to the die or package footprint.
What is the purpose of the dual output-enable (OE) inputs on CAHCT244QPWRG4Q1?
The dual OE inputs (1OE on Pin 1, 2OE on Pin 19) provide independent 3-state control for two separate 4-bit buffer groups (1A1–1A4 → 1Y1–1Y4 and 2A1–2A4 → 2Y1–2Y4). This allows selective bus isolation - for example, holding one data path active while disabling another during controller reset or power-mode transitions - improving system-level fault containment and reducing EMI during partial wake-up.
CAHCT244QPWRG4Q1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHCT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 8mA, 8mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
CAHCT244QPWRG4Q1 FAQ
1.How can I place an order for CAHCT244QPWRG4Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for CAHCT244QPWRG4Q1 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 CAHCT244QPWRG4Q1 reliable?
The price and inventory of CAHCT244QPWRG4Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CAHCT244QPWRG4Q1 is usually 5 days.
3.What payment methods are accepted for CAHCT244QPWRG4Q1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CAHCT244QPWRG4Q1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CAHCT244QPWRG4Q1?
CAHCT244QPWRG4Q1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CAHCT244QPWRG4Q1 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 CAHCT244QPWRG4Q1?
For technical support, including CAHCT244QPWRG4Q1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CAHCT244QPWRG4Q1 requirements.
6.How does Aetrix verify that CAHCT244QPWRG4Q1 is sourced from the original manufacturer or authorized distributors?
All CAHCT244QPWRG4Q1 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 CAHCT244QPWRG4Q1 meets industry standards.
7.What is the process for return or replacement of CAHCT244QPWRG4Q1?
All CAHCT244QPWRG4Q1 units undergo pre-shipment inspection (PSI). If there is an issue with CAHCT244QPWRG4Q1, 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 CAHCT244QPWRG4Q1 part is unused and in its original packaging.
Return procedure for CAHCT244QPWRG4Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CAHCT244QPWRG4Q1 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…
