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Nexperia USA Inc. 74HCT377D,652
- Part No.:
- 74HCT377D,652
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74HCT377D,652.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:147
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Product details
Overview
74HCT377D,652 from Nexperia is an octal positive-edge-triggered D-type flip-flop with data enable (E), designed for synchronous data latching in digital control and interface logic. It operates at 4.5 V to 5.5 V, delivers 17 ns typical propagation delay (VCC = 4.5 V), supports -40 °C to +125 °C operation, and features TTL-compatible inputs for direct interfacing with legacy logic families. It is used in industrial I/O expansion modules where deterministic edge-triggered state capture is required.
For engineers reviewing the 74HCT377D,652 datasheet, 74HCT377D,652 pinout, 74HCT377D,652 application, or 74HCT377D,652 equivalent, key selection criteria include input voltage compatibility (TTL-level), data enable timing constraints (tsu = 12 ns, th = 2 ns at VCC = 4.5 V), SO20 package thermal derating above 109 °C, and output drive capability (±4 mA at VCC = 4.5 V).
Technical Context
This device implements eight independent D-type flip-flops sharing a common clock (CP) and a single active-low data enable (E). When E is LOW, each Qn output synchronously captures the corresponding Dn input on the LOW-to-HIGH CP transition, provided setup and hold times are met. Input clamp diodes allow safe interfacing with voltages exceeding VCC when current-limiting resistors are used.
The 74HCT377 variant uses TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V), distinguishing it from the 74HC377's CMOS-level inputs. Its dynamic performance is characterized at CL = 50 pF, with fmax = 27 MHz (typical) and tpd = 17 ns (typical) under recommended conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74HCT - TTL-compatible input thresholds, CMOS output drive |
| Supply Voltage | 4.5 V to 5.5 V - Ensures interoperability with 5 V TTL and mixed-voltage systems |
| Propagation Delay | 17 ns (typ) CP→Qn - Enables reliable operation up to 27 MHz clock frequency |
| Input Thresholds | VIH ≥ 2.0 V, VIL ≤ 0.8 V - Guarantees noise-immune recognition of standard TTL logic levels |
| Output Drive | ±4.0 mA (VOH/VOL) - Sufficient to drive 10 LSTTL loads or multiple CMOS inputs |
| Operating Temperature | -40 °C to +125 °C - Qualified for extended industrial and under-hood applications |
| Power Dissipation | 160 μA ICC (max, -40 °C to +125 °C) - Supports low-static-power system design |
Pinout & Package
74HCT377D,652 is housed in a plastic small outline package (SO20, SOT163-1) with 20 leads and 7.5 mm body width. The package supports surface-mount assembly and provides thermal derating of 12.3 mW/K above 109 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (E) | Data enable input | Active-LOW control: enables synchronous latching only when asserted |
| 2–9, 12, 15–16, 19 (Q0–Q7) | Flip-flop outputs | Eight buffered, non-inverted latched data outputs |
| 3–4, 7–8, 13–14, 17–18 (D0–D7) | Data inputs | Eight independent asynchronous data inputs, sampled on CP edge when E = LOW |
| 10 (GND) | Ground reference | 0 V return path for all internal circuitry and I/O |
| 11 (CP) | Clock input | LOW-to-HIGH edge-triggered; defines precise sampling instant for all flip-flops |
| 20 (VCC) | Supply voltage | Primary power rail (4.5–5.5 V); powers logic core and output buffers |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | Enables direct connection to 5 V TTL outputs without level-shifting circuitry |
| Common clock & enable | Simplifies control logic by eliminating per-channel clock gating or enable routing |
| Clamp diode protection | Allows safe interface to signals up to VCC + 0.5 V using external current-limiting resistors |
| High noise immunity | Guaranteed 400 mV noise margin at VCC = 5 V due to tight VIH/VIL specifications |
| Latch-up immunity | Exceeds 100 mA per JESD78 Class II Level B - robust against transient-induced latch-up |
Applications
| Industrial PLC I/O Expansion | Automated Test Equipment (ATE) Pattern Capture |
|---|---|
|
Use Scenario: Capturing parallel sensor status bits from analog-to-digital converters or discrete input modules in real-time control cycles. IC Role / Device Role / Timing Role: Synchronous data latch that freezes eight-bit input states on a precisely timed clock edge, synchronized to system scan cycle. Use Value: Eliminates metastability risk during high-speed acquisition by enforcing strict setup/hold timing (tsu = 12 ns, th = 2 ns) and providing deterministic edge-triggered behavior. |
Use Scenario: Storing stimulus response vectors during boundary-scan or functional test sequences in ATE platforms. IC Role / Device Role / Timing Role: Edge-triggered register holding captured DUT output bits for comparison against expected patterns. Use Value: Enables sub-40 ns timing windows between stimulus application and result capture, supporting >25 MHz test clock rates with guaranteed timing margins. |
| Legacy Bus Interface Bridge | Motor Control Feedback Register |
|
Use Scenario: Interfacing microcontroller GPIO ports with older 8-bit parallel buses (e.g., ISA, proprietary control backplanes). IC Role / Device Role / Timing Role: Data buffer that isolates MCU timing from bus timing skew and provides clean, registered outputs to downstream peripherals. Use Value: TTL-compatible inputs accept direct connection to 5 V bus drivers; SO20 package allows compact layout alongside bus traces and decoupling capacitors. |
Use Scenario: Capturing encoder quadrature or Hall-effect sensor states in closed-loop motor drives before processing by PWM controllers. IC Role / Device Role / Timing Role: Synchronized register capturing position/speed feedback bits aligned to controller interrupt or PWM update events. Use Value: -40 °C to +125 °C rating ensures reliability in motor-adjacent environments; low propagation delay minimizes feedback loop latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT377PW,118 | TSSOP20 package (SOT360-1), 4.4 mm body width, 10.0 mW/K thermal derating above 100 °C | Better board space efficiency and higher thermal resistance; requires finer-pitch PCB layout | Select for space-constrained designs where thermal management via heatsinking or airflow is feasible |
| SN74HCT377N | DIP-20 package, through-hole mounting, wider operating temperature range (-40 °C to +85 °C only) | Prototyping-friendly but unsuitable for extended temperature or high-reliability industrial use | Select only for lab evaluation or low-volume non-industrial applications requiring manual assembly |
Compared with 74HCT377PW,118, the 74HCT377D,652 offers superior thermal stability above 109 °C due to SO20's lower thermal resistance and higher derating threshold; compared with SN74HCT377N, it provides full industrial temperature qualification and surface-mount reliability essential for automated production.
Availability
74HCT377D,652 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automated test equipment pattern capture, legacy bus interface bridges, and motor control feedback registers requiring stable component supply across extended temperature ranges.
Supply support for 74HCT377D,652 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 focused on high-volume, high-reliability logic, analog, and MOSFET solutions for industrial, automotive, and consumer markets.
The 74HCT377 belongs to Nexperia's industry-standard 74-series logic family, engineered for interoperability with legacy TTL systems while delivering CMOS power efficiency and robustness in harsh environments.
FAQ
What is the maximum clock frequency supported by the 74HCT377D,652?
The 74HCT377D,652 supports a maximum clock frequency of 27 MHz (typical) at VCC = 4.5 V and CL = 50 pF. At worst-case conditions (-40 °C to +125 °C), fmax is rated at 18 MHz. This limit arises from propagation delay (tpd ≤ 48 ns) and pulse width requirements (tW ≥ 25 ns), not from internal oscillator constraints.
Can the 74HCT377D,652 be used with a 3.3 V supply?
No - the 74HCT377D,652 is specified only for 4.5 V to 5.5 V operation. Its TTL-compatible input thresholds require minimum VIH = 2.0 V, but its internal logic and output drive are not characterized below 4.5 V. For 3.3 V systems, consider the 74LVC377A or 74ALVC377, which are explicitly rated for 3.3 V operation.
How does the data enable (E) pin affect timing behavior?
When E is HIGH, all Q outputs retain their previous state regardless of CP transitions - no change occurs. When E is LOW, Qn updates to Dn on the LOW-to-HIGH CP edge, subject to tsu = 12 ns and th = 2 ns (VCC = 4.5 V). E must be stable one setup time before the CP edge; violating this causes indeterminate output behavior.
Is the 74HCT377D,652 pin-compatible with the 74HC377D,652?
Yes - both share identical SO20 (SOT163-1) pinout, function table, and package dimensions. However, the 74HC377D,652 uses CMOS-level inputs (VIH = 3.15 V min at VCC = 4.5 V), making it incompatible with standard TTL outputs without level translation, unlike the TTL-compatible 74HCT377D,652.
74HCT377D,652 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 53 MHz
- Max Propagation Delay @ V, Max CL:
- 32ns @ 4.5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 4mA, 5.2mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 8 µA
- Input Capacitance:
- 3.5 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
74HCT377D,652 FAQ
1.How can I place an order for 74HCT377D,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT377D,652 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 74HCT377D,652 reliable?
The price and inventory of 74HCT377D,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT377D,652 is usually 5 days.
3.What payment methods are accepted for 74HCT377D,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT377D,652 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT377D,652?
74HCT377D,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT377D,652 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 74HCT377D,652?
For technical support, including 74HCT377D,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT377D,652 requirements.
6.How does Aetrix verify that 74HCT377D,652 is sourced from the original manufacturer or authorized distributors?
All 74HCT377D,652 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 74HCT377D,652 meets industry standards.
7.What is the process for return or replacement of 74HCT377D,652?
All 74HCT377D,652 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT377D,652, 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 74HCT377D,652 part is unused and in its original packaging.
Return procedure for 74HCT377D,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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