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Texas Instruments CD74HCT377M96
- Part No.:
- CD74HCT377M96
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CD74HCT377M96.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,485
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Product details
Overview
CD74HCT377M96 from Texas Instruments is an octal D-type flip-flop with buffered common clock and data enable, operating at 4.5V–5.5V supply. It features 16 ns typical propagation delay (CL = 15 pF, VCC = 5 V, TA = 25 °C), ±25 mA output drive, and -55 °C to +125 °C operating temperature range. It is used in synchronous data latching and bus interface circuits in industrial control and test equipment.
For engineers reviewing the CD74HCT377M96 datasheet, CD74HCT377M96 pinout, CD74HCT377M96 application, or CD74HCT377M96 equivalent, this page delivers verified functional identity, SOIC-20 package mapping, timing-critical parameters (tSU = 12–18 ns, tW = 20–30 ns), LSTTL-compatible input thresholds (VIH ≥ 2 V, VIL ≤ 0.8 V), and two validated alternative parts for industrial-grade logic design.
Technical Context
The CD74HCT377M96 implements eight edge-triggered D flip-flops sharing a single buffered clock (CP) and a common active-low data enable (E). All outputs update synchronously on the rising edge of CP when E is low; otherwise, outputs hold their state regardless of data inputs or clock transitions.
Its HCT logic family ensures direct compatibility with LSTTL voltage levels while delivering CMOS power efficiency. Input leakage remains ≤±1 µA, quiescent current is ≤160 µA over full temperature range, and it supports fanout of 10 LSTTL loads at standard outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | HCT - TTL-compatible input thresholds (VIH ≥ 2 V, VIL ≤ 0.8 V) enable direct interfacing with legacy LSTTL systems without level shifters. |
| Supply Voltage Range | 4.5 V to 5.5 V - Ensures stable operation across industrial 5 V rails with ±5% tolerance, excluding wider HC-range operation. |
| Propagation Delay (tPLH/tPHL) | 16 ns typical (CL = 15 pF, VCC = 5 V, TA = 25 °C) - Enables reliable operation up to 50 MHz maximum clock frequency under specified load conditions. |
| Set-up Time (tSU) | 12 ns min (25 °C), 15 ns min (-40 °C to +85 °C), 18 ns min (-55 °C to +125 °C) - Defines minimum data stability window before CP rising edge for guaranteed capture. |
| Hold Time (tH) | 3 ns min (data-to-CP), 5 ns min (E-to-CP) - Specifies shortest time data/enable must remain stable after CP edge to prevent metastability. |
| Output Drive Capability | ±25 mA per output - Supports direct driving of multiple LSTTL inputs or moderate capacitive loads without external buffers. |
| Operating Temperature | -55 °C to +125 °C - Qualified for extended industrial, aerospace, and automotive under-hood applications requiring wide thermal margin. |
Pinout & Package
CD74HCT377M96 is housed in a 20-pin SOIC (DW) package, 7.5 mm × 12.8 mm body size, 1.27 mm lead pitch, 2.65 mm max height, RoHS-compliant NiPdAu lead finish, MSL Level-1 (unlimited floor life).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (E) | Data Enable (active-low) | Global control enabling simultaneous loading of all eight D inputs on next CP rising edge; high = hold state. |
| 2–9 (D0–D7) | Data Inputs | Asynchronous parallel data inputs; sampled only when E = low and CP rises. |
| 10 (GND) | Ground Reference | Primary return path for logic and output currents; requires low-impedance PCB connection to minimize noise coupling. |
| 11–18 (Q0–Q7) | Flip-Flop Outputs | Registered, non-inverted outputs reflecting Dn state captured at prior CP edge (when E was low). |
| 19 (CP) | Clock Input | Buffered positive-edge-triggered clock; all eight flip-flops share this single synchronized timing reference. |
| 20 (VCC) | Power Supply | 5 V nominal supply input; decoupling capacitor (0.1 µF ceramic) required within 10 mm of pin for stable switching performance. |
Key Features
| Feature | Design Value |
|---|---|
| Buffered Common Clock (CP) | Reduces clock skew across all eight flip-flops, ensuring deterministic synchronous behavior in multi-bit latching applications. |
| Buffered Inputs (Dn, E) | Improves noise immunity and drive capability, allowing direct connection to high-capacitance buses or long traces without signal degradation. |
| LSTTL-Compatible Input Thresholds | VIH ≥ 2 V (min), VIL ≤ 0.8 V (max) at VCC = 5 V - eliminates need for external level translation when interfacing with 74LS or 74ALS families. |
| Balanced Propagation Delay & Transition Times | Minimizes duty cycle distortion on Q outputs, critical for clock distribution or feedback timing paths in closed-loop digital systems. |
| Wide Operating Temperature Range | -55 °C to +125 °C - enables use in harsh environments including motor drives, avionics, and downhole instrumentation without derating. |
Applications
| Industrial PLC I/O Expansion | Automated Test Equipment (ATE) Pattern Generation |
|---|---|
Use Scenario: Latching parallel sensor data from analog-to-digital converters before serial transmission to a microcontroller. IC Role / Device Role / Timing Role: Synchronous 8-bit data register capturing sampled values on a system clock edge under enable control. Use Value: Eliminates metastability risk during high-speed sampling and provides clean, glitch-free parallel-to-serial interface staging. |
Use Scenario: Holding stimulus patterns for device-under-test (DUT) while maintaining precise timing alignment across multiple channels. IC Role / Device Role / Timing Role: Edge-triggered pattern storage element synchronized to ATE master clock with programmable enable gating. Use Value: Enables deterministic pattern sequencing with sub-20 ns timing resolution and robust noise immunity in noisy lab environments. |
| Motor Control Feedback Capture | Legacy Bus Interface Bridge |
Use Scenario: Capturing encoder quadrature signals or Hall-effect sensor states for real-time position tracking in servo drives. IC Role / Device Role / Timing Role: High-reliability data latch sampling position data at fixed intervals aligned to PWM carrier edges. Use Value: Guarantees setup/hold compliance even under rapid voltage transients common in motor drive power stages. |
Use Scenario: Interfacing modern microcontrollers with older LSTTL-based peripheral cards or backplane buses. IC Role / Device Role / Timing Role: Voltage-level and timing-transparent bridge between 3.3 V/5 V MCU GPIO and 5 V LSTTL logic subsystems. Use Value: Preserves original timing budgets while enabling drop-in replacement of obsolete 74LS377 in field-upgrade scenarios. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type flip-flop with data enable applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT377N | PDIP-20 package; identical electrical specs and pinout; higher thermal resistance (θJA = 69 °C/W vs. 58 °C/W for SOIC). | Suitable for prototyping or low-volume through-hole assembly; less suitable for high-density or thermally constrained PCBs. | Select SN74HCT377N only when manual soldering or socket-based testing is required. |
| CD74HCT377M | Same SOIC-20 package but marked as Obsolete by TI; no tape-and-reel availability (SPQ = -); last-time-buy status confirmed. | Not recommended for new designs due to discontinuation risk and lack of volume supply assurance. | Prefer CD74HCT377M96 for production programs requiring guaranteed long-term sourcing and automated placement support. |
Compared with SN74HCT377N and CD74HCT377M, the CD74HCT377M96 offers optimal balance of industrial temperature rating, surface-mount manufacturability, tape-and-reel logistics (2000 pcs/reel), and active production status - making it the preferred choice for volume OEM deployments.
Availability
CD74HCT377M96 is available at Aetrix Electronics and suitable for industrial automation, motor control, and automated test equipment requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for CD74HCT377M96 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 logic solutions, with decades of heritage in high-reliability logic families.
The CD74HCT377M96 belongs to TI's CD74HCT high-speed CMOS logic series, designed specifically for industrial and military applications demanding wide temperature operation, LSTTL compatibility, and robust noise immunity.
FAQ
What is the maximum clock frequency supported by CD74HCT377M96?
The CD74HCT377M96 supports a maximum clock frequency of 25 MHz at 25 °C, 20 MHz over -40 °C to +85 °C, and 16 MHz across its full -55 °C to +125 °C operating range. These values assume CL = 15 pF load and proper decoupling; actual achievable frequency depends on board layout and signal integrity.
Does CD74HCT377M96 require external pull-up or pull-down resistors on its inputs?
No, the CD74HCT377M96 does not require external pull-up or pull-down resistors on its inputs. Its CMOS inputs exhibit ≤±1 µA leakage current and defined VIH/VIL thresholds; however, unused inputs (especially E and CP) should be tied to VCC or GND to prevent floating states and unintended toggling.
Can CD74HCT377M96 operate at 3.3 V supply voltage?
No, CD74HCT377M96 is not rated for 3.3 V operation. Its HCT family specification mandates 4.5 V to 5.5 V supply; operation below 4.5 V may result in undefined logic levels, increased propagation delay, or failure to meet VIH/VIL thresholds. For 3.3 V systems, consider HC-family variants like CD74HC377M96 instead.
What is the meaning of the "96" suffix in CD74HCT377M96?
The "96" suffix in CD74HCT377M96 indicates tape-and-reel packaging: 2000 units per large reel, compatible with automated SMT placement equipment. This distinguishes it from tube-packaged versions (e.g., CD74HCT377M) and confirms its suitability for high-volume manufacturing.
How does the Data Enable (E) pin function in CD74HCT377M96?
In CD74HCT377M96, the active-low Data Enable (pin 1) controls whether data is loaded: when E = low, all eight D inputs are latched on the next rising edge of CP; when E = high, Q outputs retain their current state regardless of D or CP activity - enabling selective, synchronized updates without disrupting ongoing operations.
CD74HCT377M96 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 50 MHz
- Max Propagation Delay @ V, Max CL:
- 38ns @ 4.5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 4mA, 4mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 8 µA
- Input Capacitance:
- 10 pF
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
CD74HCT377M96 FAQ
1.How can I place an order for CD74HCT377M96 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HCT377M96 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 CD74HCT377M96 reliable?
The price and inventory of CD74HCT377M96 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HCT377M96 is usually 5 days.
3.What payment methods are accepted for CD74HCT377M96?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HCT377M96 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HCT377M96?
CD74HCT377M96 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HCT377M96 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 CD74HCT377M96?
For technical support, including CD74HCT377M96 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HCT377M96 requirements.
6.How does Aetrix verify that CD74HCT377M96 is sourced from the original manufacturer or authorized distributors?
All CD74HCT377M96 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 CD74HCT377M96 meets industry standards.
7.What is the process for return or replacement of CD74HCT377M96?
All CD74HCT377M96 units undergo pre-shipment inspection (PSI). If there is an issue with CD74HCT377M96, 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 CD74HCT377M96 part is unused and in its original packaging.
Return procedure for CD74HCT377M96:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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