My Inquiry
My Account
Texas Instruments CD74HC534EG4
- Part No.:
- CD74HC534EG4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
CD74HC534EG4.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,152
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CD74HC534EG4 from Texas Instruments is a high-speed CMOS octal D-type flip-flop with three-state inverting outputs, positive-edge clock triggering, buffered inputs, and common output-enable control. It operates from 2 V to 6 V, delivers 13 ns typical propagation delay (VCC = 5 V, CL = 15 pF), drives up to 15 LSTTL loads, and supports –55℃ to 125℃ industrial/military temperature range. It is used for bus-oriented data latching and interface isolation in digital control systems.
For engineers reviewing the CD74HC534EG4 datasheet, CD74HC534EG4 pinout, CD74HC534EG4 application, or CD74HC534EG4 equivalent, key selection criteria include its inverting Q-output behavior, shared OE control, wide supply voltage tolerance, guaranteed three-state disable timing, and PDIP-20 package compatibility with legacy through-hole designs.
Technical Context
The CD74HC534EG4 implements eight edge-triggered D flip-flops with inverted Q outputs and a single active-low output-enable (OE) input that places all Q outputs in high-impedance state regardless of clock or data state. Its silicon-gate CMOS process ensures low static current (ICC ≤ 160 µA at 6 V, –55℃ to 125℃) and high noise immunity (NIL/NIH = 30% of VCC).
It differs from the functionally identical CD74HC564 family only in pinout: CD74HC534EG4 uses OE on pin 1 and CP on pin 11, while CD74HC564 assigns OE to pin 13 and CP to pin 10 - a critical layout distinction for PCB design and signal routing integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | High-speed CMOS (HC), compatible with 2–6 V supply; no LSTTL input level dependency |
| Propagation Delay | 13 ns typical (VCC = 5 V, CL = 15 pF); enables reliable operation up to 29 MHz at full temperature range |
| Output Drive | 15 LSTTL loads; sufficient to drive multiple downstream logic gates or bus segments without buffering |
| Operating Temperature | –55℃ to 125℃; qualified for military, aerospace, and harsh-environment industrial applications |
| Three-State Disable Time | tPLZ/tPHZ = 30 ns max (VCC = 4.5 V, –40℃ to 85℃); ensures fast bus release for time-critical arbitration |
| Input Capacitance | 10 pF; minimizes loading on upstream drivers and preserves signal integrity in high-speed fanout |
| Supply Current | ≤160 µA max over full temperature range; supports low-power standby modes in battery-backed systems |
Pinout & Package
CD74HC534EG4 is supplied in a 20-pin plastic dual in-line package (PDIP-N), with 25.40 mm × 6.35 mm body size, through-hole mounting, and RoHS-compliant NiPdAu lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-low output enable | Drives all Q outputs to high-impedance when high; synchronous disable independent of clock edge |
| 2–9 (D0–D7) | Data inputs | Accept parallel 8-bit data; buffered inputs reduce capacitive loading and improve noise rejection |
| 10 (GND) | Ground reference | Common return path for all internal logic and output drivers; must be low-impedance for stable switching |
| 11 (CP) | Positive-edge clock | Triggers simultaneous sampling of D0–D7 on rising transition; defines system timing boundary |
| 12–19 (Q0–Q7) | Inverted outputs | Provide complemented latched data; three-state capable under OE control for bidirectional bus use |
| 20 (VCC) | Power supply | Supports 2–6 V operation; requires local 0.1-µF bypass capacitor per TI layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Buffered inputs | Reduces input capacitance to 10 pF and increases noise margin, enabling robust operation in noisy industrial environments |
| Common three-state OE control | Single-pin bus arbitration simplifies control logic and eliminates race conditions during multi-device bus sharing |
| Inverting Q outputs | Provides direct compatibility with active-low bus architectures and simplifies level-shifting in mixed-voltage systems |
| 15-LSTTL output drive | Eliminates need for external bus transceivers in medium-density logic interfaces, reducing BOM count and board area |
| –55℃ to 125℃ operation | Validated performance across extended temperature range supports deployment in avionics, downhole tools, and engine control units |
Applications
| Industrial PLC I/O Expansion | Avionics Data Bus Interface |
|---|---|
Use Scenario: Expanding discrete input/output capacity in programmable logic controllers using shared backplane buses. IC Role / Device Role / Timing Role: Octal latch buffers sensor/actuator signals onto a multiplexed data bus with synchronized edge-triggered capture. Use Value: Inverting outputs match standard negative-logic optocoupler interfaces; three-state OE allows dynamic bus ownership handoff between CPU and peripheral modules. | Use Scenario: Isolating and latching flight control command data between dissimilar subsystems in airborne computing units. IC Role / Device Role / Timing Role: High-reliability data register providing radiation-tolerant, temperature-stable storage with fail-safe bus disconnection. Use Value: Extended –55℃ to 125℃ rating meets DO-160E environmental test requirements; 13 ns propagation supports 20+ MHz deterministic control loops. |
| Military Communication Baseband | Test Equipment Digital Pattern Generator |
Use Scenario: Synchronizing encrypted data streams across modular radio chassis using MIL-STD-1553 or custom serial protocols. IC Role / Device Role / Timing Role: Clock-domain crossing buffer with precise setup/hold timing (tSU = 13 ns min, tH = 5 ns min at VCC = 6 V) for jitter-sensitive demodulation paths. Use Value: HC logic family ensures compatibility with both 3.3 V and 5 V FPGA I/O banks; PDIP-20 facilitates manual rework and long-term field repairability. | Use Scenario: Generating repeatable 8-bit stimulus patterns for IC functional testing in automated test equipment (ATE) platforms. IC Role / Device Role / Timing Role: Parallel pattern register holding test vectors under microcontroller or FPGA control, with OE enabling pattern update without bus contention. Use Value: 15-LSTTL drive strength directly drives TTL-level test fixtures; 100% tested DC specs guarantee vector accuracy across temperature extremes. |
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 |
|---|---|---|---|
| CD74HC564E | Different pinout: OE on pin 13, CP on pin 10; otherwise identical electrical specs and functionality | Requires PCB redesign due to non-interchangeable clock and enable pin locations; unsuitable for drop-in replacement | Select CD74HC564E only when new layout accommodates revised signal routing and timing constraints |
| SN74HC574N | Non-inverting Q outputs; same PDIP-20 package; 18 ns typical tPD at 5 V; identical VCC range and temperature rating | Used where true (non-inverted) latched data is required; incompatible with circuits relying on Q̅ behavior of CD74HC534EG4 | Choose SN74HC574N when system logic expects direct Q outputs and inversion is handled elsewhere in the data path |
Compared with CD74HC534EG4, CD74HC564E offers identical performance but mandates layout revision due to pin rearrangement, while SN74HC574N provides functional parity for non-inverting applications but removes the built-in inversion needed for legacy bus architectures.
Availability
CD74HC534EG4 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, avionics data bus interface, military communication baseband, and test equipment digital pattern generation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD74HC534EG4 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 and embedded processing solutions, with over 90 years of innovation in high-reliability logic, power management, and signal chain technologies.
CD74HC534EG4 belongs to TI's CD74HC high-speed CMOS logic family, designed specifically for robust, low-power, wide-temperature digital interfacing in mission-critical industrial, defense, and aerospace systems.
FAQ
What is the maximum clock frequency supported by CD74HC534EG4 across its full operating temperature range?
CD74HC534EG4 supports a maximum clock frequency of 23 MHz at VCC = 6 V and –55℃ to 125℃, 20 MHz at VCC = 4.5 V, and 4 MHz at VCC = 2 V. These values are specified in the Switching Characteristics table (Section 5.5) and validated across the full military-grade temperature range, ensuring timing compliance in extreme environments where CD74HC534EG4 is deployed.
Does CD74HC534EG4 have non-inverting or inverting outputs?
CD74HC534EG4 has inverting outputs (Q̅). Data presented at D0–D7 is latched on the positive clock edge and appears at Q0–Q7 in complemented form. This distinguishes it from non-inverting variants like SN74HC574N and is explicitly confirmed in the device description, functional diagram, and truth table of the TI datasheet for CD74HC534EG4.
Can CD74HC534EG4 be used with a 3.3 V supply?
Yes, CD74HC534EG4 is fully compatible with 3.3 V operation, as its HC logic family supports VCC from 2 V to 6 V. At 3.3 V, VIH = 2.31 V (min), VIL = 1.09 V (max), VOH ≥ 3.2 V (IOL = 20 µA), and VOL ≤ 0.1 V - all verified in the Electrical Characteristics tables. This makes CD74HC534EG4 suitable for mixed-voltage systems interfacing with 3.3 V FPGAs or microcontrollers.
What is the purpose of the buffered inputs in CD74HC534EG4?
The buffered inputs in CD74HC534EG4 reduce effective input capacitance to 10 pF and increase noise immunity (NIL/NIH = 30% of VCC), preventing false triggering from transient coupling or slow-rising signals. This design feature ensures reliable operation in electrically noisy industrial settings and allows longer trace routing without signal degradation - a key reliability factor confirmed in TI's application notes for CD74HC534EG4.
Is CD74HC534EG4 pin-compatible with CD74HC564E?
No, CD74HC534EG4 is not pin-compatible with CD74HC564E. Although functionally identical, their pinouts differ: CD74HC534EG4 places OE on pin 1 and CP on pin 11, whereas CD74HC564E assigns OE to pin 13 and CP to pin 10. This difference is documented in the Pin Configuration section of the TI datasheet and prevents direct PCB substitution without layout modification.
CD74HC534EG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 60 MHz
- Max Propagation Delay @ V, Max CL:
- 28ns @ 6V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Current - Quiescent (Iq):
- 8 µA
- Input Capacitance:
- 10 pF
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-PDIP
CD74HC534EG4 FAQ
1.How can I place an order for CD74HC534EG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HC534EG4 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 CD74HC534EG4 reliable?
The price and inventory of CD74HC534EG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HC534EG4 is usually 5 days.
3.What payment methods are accepted for CD74HC534EG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HC534EG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HC534EG4?
CD74HC534EG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HC534EG4 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 CD74HC534EG4?
For technical support, including CD74HC534EG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HC534EG4 requirements.
6.How does Aetrix verify that CD74HC534EG4 is sourced from the original manufacturer or authorized distributors?
All CD74HC534EG4 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 CD74HC534EG4 meets industry standards.
7.What is the process for return or replacement of CD74HC534EG4?
All CD74HC534EG4 units undergo pre-shipment inspection (PSI). If there is an issue with CD74HC534EG4, 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 CD74HC534EG4 part is unused and in its original packaging.
Return procedure for CD74HC534EG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CD74HC534EG4 Tags
-
SN74HC74DR
Texas Instruments
-
SN74HC74PWR
Texas Instruments
-
74LVC1G74GT,115
Nexperia USA Inc.
-
SN74LVC2G74DCUR
Texas Instruments
-
CD4013BM96
Texas Instruments
-
SN74HCT273PWR
Texas Instruments
-
SN74LVC1G74DCUR
Texas Instruments
-
SN74HC574DWR
Texas Instruments
-
74LVC1G74DC,125
Nexperia USA Inc.
-
SN74HC273DWR
Texas Instruments
-
SN74HCT574DWR
Texas Instruments
-
SN74LVC1G74DCTR
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…
