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Texas Instruments CAHCT240IPWRG4Q1
- Part No.:
- CAHCT240IPWRG4Q1
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
CAHCT240IPWRG4Q1.pdf
- Description:
- IC BUFFER INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,944
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Product details
Overview
CAHCT240IPWRG4Q1 from Texas Instruments is an automotive-qualified octal 3-state inverting buffer/driver IC, organized as two independent 4-bit sections with separate output-enable (OE) controls. It operates at 4.5–5.5 V, delivers ±8 mA output drive, supports TTL-compatible inputs, and features propagation delays as low as 5.4 ns (tPLH/tPHL) at 5 V with 15 pF load. It is used in memory address buffering, clock distribution, and bus interface circuits in automotive control modules.
For engineers reviewing the CAHCT240IPWRG4Q1 datasheet, CAHCT240IPWRG4Q1 pinout, CAHCT240IPWRG4Q1 application, or CAHCT240IPWRG4Q1 equivalent, key selection criteria include automotive AEC-Q100 qualification, TSSOP-20 package compatibility, dual 4-bit 3-state inverting logic architecture, guaranteed high-impedance state during power sequencing, and ±25 mA continuous output current capability.
Technical Context
This device implements dual independent 4-bit inverting buffers with active-low output-enable control per section. Each section passes inverted A-input data to Y-outputs when its OE is low; outputs enter high-impedance state when OE is high. Input thresholds are TTL-compatible (VIL = 0.8 V, VIH = 2 V), ensuring robust interfacing with legacy 5 V logic families.
Designed for automotive environments, it meets AEC-Q100 Grade 2 (−40°C to +85°C), exhibits latch-up immunity >250 mA per JESD17, and supports safe power-up/power-down via OE pull-up to VCC. Its electrical characteristics are fully specified across temperature and voltage, including VOL ≤ 0.44 V at IOL = 8 mA and VOH ≥ 3.8 V at IOH = −8 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures stable operation across automotive battery rail variations including cold-crank conditions. |
| Output Drive | ±8 mA - Sufficient to drive standard 50 Ω transmission lines or multiple CMOS inputs without external buffering. |
| Propagation Delay | 5.4 ns (min) at 5 V/15 pF - Enables use in high-speed address/data bus applications up to ~100 MHz system timing. |
| Input Compatibility | TTL-voltage compatible (VIH = 2 V, VIL = 0.8 V) - Directly interfaces with legacy 5 V microcontrollers and peripheral ICs without level shifters. |
| Operating Temperature | −40°C to +85°C - Qualified per AEC-Q100 for under-hood and cabin-mounted automotive ECUs. |
| Output Type | 3-state inverting - Allows bidirectional bus sharing and prevents contention in multiplexed memory or I/O systems. |
| Power Dissipation | 10 pF typical Cpd - Low dynamic power consumption supports thermally constrained automotive PCB layouts. |
Pinout & Package
TSSOP-20 (PW) package, 6.5 mm × 4.4 mm footprint, 0.65 mm lead pitch, 1.2 mm max height, RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low output enable | Controls high-impedance state for respective 4-bit section; requires pull-up to VCC for safe power sequencing. |
| 1A1–1A4, 2A1–2A4 | Inverting data inputs | Accept TTL-level signals; invert and route to corresponding Y outputs when OE is low. |
| 1Y1–1Y4, 2Y1–2Y4 | Inverting buffered outputs | Provide inverted, 3-state outputs with ±25 mA absolute max drive; support bus arbitration. |
| VCC (Pin 10), GND (Pin 20) | Power supply terminals | Single 5 V supply; decoupling capacitor required near VCC/GND pins for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Grade 2 (−40°C to +85°C) - Certified for automotive powertrain, body control, and ADAS modules. |
| Latch-up immunity | >250 mA per JESD17 - Prevents destructive failure during ESD or transient overvoltage events. |
| High-impedance control | OE tied to VCC via pull-up ensures defined Hi-Z state at power-up - Eliminates bus glitches during boot. |
| TTL input compatibility | VIH = 2 V, VIL = 0.8 V - Interoperates with legacy 5 V microcontrollers, FPGAs, and ASICs without level translation. |
| Low dynamic power | Cpd = 10 pF - Reduces switching current and thermal load in dense automotive PCBs. |
Applications
| Engine Control Unit (ECU) Address Buffering | Automotive Instrument Cluster Bus Interface |
|---|---|
Use Scenario: Buffering 16-bit memory-mapped peripheral addresses in a 32-bit MCU-based engine controller. IC Role / Device Role / Timing Role: Inverting 3-state buffer isolating CPU address bus from flash/RAM peripherals during DMA cycles. Use Value: Prevents bus contention during concurrent access, enables clean address decoding with <5.5 ns delay margin at 50 MHz clock. |
Use Scenario: Driving shared SPI or parallel display data bus between MCU and TFT LCD driver in digital dashboard. IC Role / Device Role / Timing Role: Bidirectional bus transceiver enabling MCU to write display data while allowing readback of touch controller status. Use Value: Dual 4-bit sections allow independent control of upper/lower nibbles; 3-state outputs prevent signal corruption during bus arbitration. |
| ADAS Camera Module Clock Distribution | Body Control Module (BCM) I/O Expansion |
Use Scenario: Distributing synchronized pixel clock and frame sync signals from image sensor to FPGA in surround-view camera system. IC Role / Device Role / Timing Role: Inverting clock driver providing matched delay paths and fan-out to multiple receivers. Use Value: Guaranteed tsk(o) ≤ 1 ns skew between outputs ensures sub-pixel timing alignment critical for multi-sensor stitching. |
Use Scenario: Expanding GPIO count for door lock actuators, window lift motors, and mirror controls in centralized BCM. IC Role / Device Role / Timing Role: Logic-level translator and buffer between 3.3 V MCU GPIO and 5 V relay drivers or LED indicators. Use Value: TTL-compatible inputs accept 3.3 V logic highs directly; ±8 mA drive supports direct LED sinking without external transistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal 3-state inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AHCT240QPWRQ1 | Same logic function, identical pinout, but rated for commercial temperature range (−40°C to +125°C not supported); no AEC-Q100 certification. | Suitable only for non-automotive industrial or consumer applications where extended temperature or automotive qualification is unnecessary. | Select when cost sensitivity outweighs automotive qualification requirements and full temperature range is not needed. |
| CAHCT240QWRKSRQ1 | VQFN-20 (RKS) package instead of TSSOP-20; same electrical specs and AEC-Q100 Grade 2 rating; exposed thermal pad improves thermal performance. | Better suited for space-constrained automotive modules requiring lower profile (<1 mm height) and enhanced thermal dissipation. | Choose for new designs prioritizing board area reduction and thermal management over legacy TSSOP footprint compatibility. |
Compared with SN74AHCT240QPWRQ1, CAHCT240IPWRG4Q1 adds mandatory AEC-Q100 qualification and tighter production traceability; compared with CAHCT240QWRKSRQ1, it trades thermal performance and footprint size for established TSSOP assembly infrastructure and mechanical robustness in vibration-prone environments.
Availability
CAHCT240IPWRG4Q1 is available at Aetrix Electronics and suitable for automotive engine control units, instrument cluster interfaces, ADAS camera modules, and body control modules requiring stable component supply across long production lifecycles.
Supply support for CAHCT240IPWRG4Q1 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-grade logic solutions with over 50 years of innovation in high-reliability IC design.
The SN74AHCT family delivers 5 V TTL-compatible CMOS logic optimized for automotive and industrial applications requiring robust noise immunity, wide temperature operation, and AEC-Q100 compliance.
FAQ
What is the AEC-Q100 qualification status of CAHCT240IPWRG4Q1?
CAHCT240IPWRG4Q1 is AEC-Q100 qualified Grade 2 (−40°C to +85°C), certified for automotive applications including engine control, body electronics, and ADAS subsystems. This qualification covers stress testing for temperature cycling, humidity bias, and latch-up immunity exceeding 250 mA per JESD17 - all verified per TI's automotive production flow. The CAHCT240IPWRG4Q1 part marking and packaging documentation confirm full compliance.
How does CAHCT240IPWRG4Q1 ensure safe operation during power-up and power-down sequences?
CAHCT240IPWRG4Q1 ensures safe operation by requiring OE pins to be tied to VCC through a pull-up resistor, guaranteeing outputs remain in high-impedance state until valid supply and control signals stabilize. The minimum pull-up resistance is determined by the driver's current-sinking capability, and this design prevents bus contention or undefined states during brown-out or reset conditions - a critical requirement validated in automotive power sequencing tests for CAHCT240IPWRG4Q1.
Can CAHCT240IPWRG4Q1 interface directly with 3.3 V microcontrollers?
Yes, CAHCT240IPWRG4Q1 accepts 3.3 V logic-high inputs reliably because its VIH threshold is 2.0 V (min), well below 3.3 V logic levels. Its TTL-compatible input structure ensures robust recognition of 3.3 V signals without external level shifters, making CAHCT240IPWRG4Q1 suitable for mixed-voltage automotive systems where 3.3 V MCUs drive 5 V peripheral buses.
What is the maximum capacitive load CAHCT240IPWRG4Q1 can drive while maintaining specified timing?
CAHCT240IPWRG4Q1 is characterized for loads up to 50 pF, with propagation delays specified as tPLH/tPHL ≤ 9.5 ns and enable/disable times ≤ 13 ns at VCC = 5 V. Driving loads beyond 50 pF increases delay and may degrade edge integrity; for heavier loads, CAHCT240IPWRG4Q1 should be paired with local termination or distributed buffering per TI application guidance.
Is CAHCT240IPWRG4Q1 pin-compatible with standard SN74AHCT240 variants?
Yes, CAHCT240IPWRG4Q1 uses the industry-standard TSSOP-20 (PW) package with identical pinout to SN74AHCT240QPWRQ1 and SN74AHCT240IPWRQ1. All share the same 1OE/2OE control scheme, A/Y signal mapping, and VCC/GND placement - enabling drop-in replacement in existing layouts where automotive qualification and traceability are added requirements.
CAHCT240IPWRG4Q1 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, 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 ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
CAHCT240IPWRG4Q1 FAQ
1.How can I place an order for CAHCT240IPWRG4Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for CAHCT240IPWRG4Q1 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 CAHCT240IPWRG4Q1 reliable?
The price and inventory of CAHCT240IPWRG4Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CAHCT240IPWRG4Q1 is usually 5 days.
3.What payment methods are accepted for CAHCT240IPWRG4Q1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CAHCT240IPWRG4Q1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CAHCT240IPWRG4Q1?
CAHCT240IPWRG4Q1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CAHCT240IPWRG4Q1 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 CAHCT240IPWRG4Q1?
For technical support, including CAHCT240IPWRG4Q1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CAHCT240IPWRG4Q1 requirements.
6.How does Aetrix verify that CAHCT240IPWRG4Q1 is sourced from the original manufacturer or authorized distributors?
All CAHCT240IPWRG4Q1 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 CAHCT240IPWRG4Q1 meets industry standards.
7.What is the process for return or replacement of CAHCT240IPWRG4Q1?
All CAHCT240IPWRG4Q1 units undergo pre-shipment inspection (PSI). If there is an issue with CAHCT240IPWRG4Q1, 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 CAHCT240IPWRG4Q1 part is unused and in its original packaging.
Return procedure for CAHCT240IPWRG4Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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