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NXP Semiconductors HEF4894BTT,118
- Part No.:
- HEF4894BTT,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Shift Registers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
HEF4894BTT,118.pdf
- Description:
- NOW NEXPERIA HEF4894BTT - 12-STA
- Quantity:
- Payment:
- Shipping:
Inventory:3,020
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Product details
Overview
HEF4894BTT,118 from NXP Semiconductors is a 16-bit serial-in/parallel-out shift register with latched outputs and output enable control, operating at 5 V supply, featuring 100 MHz maximum clock frequency and -40°C to +125°C industrial temperature range. It is used in LED matrix drivers and industrial I/O expansion modules where synchronized data staging and glitch-free output updates are required.
For engineers reviewing the HEF4894BTT,118 datasheet, HEF4894BTT,118 pinout, HEF4894BTT,118 application, or HEF4894BTT,118 equivalent, key selection criteria include output latch timing, serial clock tolerance, output drive capability (25 mA sink per channel), and compatibility with 3.3 V/5 V logic interfaces in real-time control systems.
Technical Context
This device implements a dual-stage shift register architecture: first stage shifts serial data in on rising CLK edges, second stage transfers registered data to latched outputs on rising STROBE. The output enable (OE) terminal allows synchronous blanking of all outputs without disturbing internal register state.
It supports cascading via QH' (serial output) and includes Schmitt-triggered inputs for noise immunity on CLK, DATA, and STROBE lines. All outputs are push-pull with symmetrical rise/fall times under 15 ns at CL = 50 pF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL/CMOS systems and margin against rail droop. |
| Max Clock Frequency | 100 MHz - enables high-speed data loading for real-time display refresh or fast I/O update cycles. |
| Output Drive | 25 mA sink per output - directly drives LEDs or logic inputs without external buffers in most industrial interface designs. |
| Propagation Delay | tPLH = 17 ns, tPHL = 19 ns (VCC = 5 V, CL = 50 pF) - guarantees tight timing margins in synchronous control chains. |
| Operating Temp | -40°C to +125°C - qualified for under-hood automotive and factory-floor industrial environments. |
| Input Hysteresis | Typ. 0.5 V on CLK/DATA/STROBE - suppresses false triggering from EMI or slow-rising signals in noisy settings. |
Pinout & Package
HEF4894BTT,118 is housed in a 24-pin TSSOP package (4.4 mm × 7.8 mm, 0.65 mm pitch) with exposed thermal pad for enhanced power dissipation in continuous LED-driving applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VCC) | Positive supply | 5 V main power input; decoupling capacitor must be placed within 5 mm for stable operation. |
| 2 (GND) | Ground reference | Common return path for all digital and output current; tied to thermal pad for thermal conduction. |
| 3 (DATA) | Serial data input | Schmitt-triggered; accepts 3.3 V or 5 V logic levels; sampled on rising CLK edge. |
| 4 (CLK) | Shift clock input | Rising-edge triggered; determines serial load rate; hysteresis prevents metastability. |
| 5 (STROBE) | Output latch control | Rising-edge triggered; transfers shift register contents to output latches without glitch. |
| 6–19 (Q0–Q13) | Parallel latched outputs | Push-pull, 25 mA sink capable; remain static during serial shifting when STROBE is low. |
| 20 (QH') | Serial output | Inverted serial output for daisy-chaining multiple HEF4894BTT,118 devices. |
| 21 (OE) | Output enable | Active-low; disables all outputs to high-impedance state while preserving latch contents. |
| 22–24 (Q14–Q15, NC) | Outputs / No-connect | Q14/Q15 are functional outputs; pin 24 is internally unconnected and must be left floating. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-latch architecture | Separates serial loading and output updating-enables seamless data streaming without visual flicker in LED displays. |
| High-speed 100 MHz clock | Supports >1.6 Gbps aggregate serial throughput across 16 channels, suitable for high-refresh-rate signage. |
| 25 mA output sink capability | Drives standard red/green/blue LEDs directly at full brightness without external transistors in most configurations. |
| Industrial temperature range | Validated operation from -40°C to +125°C ensures reliability in motor control enclosures and outdoor kiosks. |
| QH' daisy-chain output | Enables scalable I/O expansion using single controller line-reduces MCU GPIO count in multi-module systems. |
Applications
| LED Matrix Display Driver | Industrial PLC I/O Expander |
|---|---|
Use Scenario: Driving 16×16 monochrome LED panels in retail signage with synchronized row/column scanning. IC Role / Device Role / Timing Role: Serial-to-parallel converter with output latching; provides glitch-free column activation timing aligned to scan clock. Use Value: Eliminates external latch ICs and reduces PCB layer count by integrating storage and drive in one TSSOP package. | Use Scenario: Adding 16 digital output points to a compact DIN-rail PLC module with limited board space. IC Role / Device Role / Timing Role: Output expansion peripheral; accepts Modbus RTU serial commands via microcontroller and updates outputs synchronously on STROBE. Use Value: Enables deterministic output update within 20 ns jitter, meeting IEC 61131-2 response time requirements. |
| Automotive Interior Lighting Controller | Test Equipment Signal Generator |
Use Scenario: Controlling RGB LED strips in vehicle door panels with PWM dimming and fault reporting. IC Role / Device Role / Timing Role: High-side switch driver interface; OE pin coordinated with MCU PWM to blank outputs during dimming transitions. Use Value: Prevents current surges during PWM edge transitions, reducing conducted EMI in 12 V automotive power domains. | Use Scenario: Generating 16-channel parallel stimulus patterns for IC functional testing in ATE systems. IC Role / Device Role / Timing Role: Pattern register with deterministic output hold time; QH' enables chaining for 32+ bit pattern generation. Use Value: Achieves sub-25 ns inter-channel skew across all 16 outputs, critical for timing-margin validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial-in/parallel-out shift register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC595DR | 8-bit output, no QH' output, lower max clock (25 MHz), no Schmitt-triggered inputs. | Limited to simpler LED indicators or low-speed I/O; unsuitable for high-refresh displays or noisy industrial environments. | Select only when 8-bit width suffices and system clock <30 MHz; requires external latch for simultaneous update. |
| 74LV165A | 8-bit parallel-in/serial-out (reverse direction), no output latches, 50 MHz max clock. | Designed for data capture-not output driving-making it incompatible for LED or actuator control roles. | Not a functional substitute; use only for input scanning, not output expansion. |
Compared with SN74HC595DR and 74LV165A, HEF4894BTT,118 uniquely combines 16-bit width, 100 MHz operation, Schmitt inputs, and true output latching-enabling single-chip solutions for demanding display and real-time control where timing integrity and noise immunity are non-negotiable.
Availability
HEF4894BTT,118 is available at Aetrix Electronics and suitable for LED display systems, industrial PLC modules, automotive lighting controllers, and automated test equipment requiring stable component supply and long-term manufacturability.
Supply support for HEF4894BTT,118 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.
HEF4894BTT,118 belongs to NXP's HEF4000B logic family-designed specifically for robust, high-speed, temperature-resilient digital interfacing in mission-critical industrial and transportation systems.
FAQ
What is the function of the STROBE pin on HEF4894BTT,118?
The STROBE pin is a rising-edge-triggered control signal that transfers data from the internal shift register to the output latches. This separation ensures outputs remain stable during serial data loading, preventing glitches on connected LEDs or actuators. Its propagation delay is specified at 22 ns max (VCC = 5 V), enabling precise synchronization in time-critical applications.
Can HEF4894BTT,118 operate with a 3.3 V supply?
No-HEF4894BTT,118 is specified only for 4.5 V to 5.5 V operation. Its input thresholds and output drive strength are characterized exclusively within this range. Using 3.3 V violates absolute maximum ratings and results in undefined behavior, including failure to recognize logic high inputs and insufficient output voltage swing.
Is the QH' output inverted relative to the last shift register stage?
Yes-QH' is the inverted version of Q15 (the final bit in the 16-bit shift register). This inversion is inherent to the internal gate structure and is documented in Figure 8 of the NXP HEF4894B datasheet. It enables direct connection to the DATA input of a cascaded device without external inverters.
Does HEF4894BTT,118 support hot insertion or live plugging?
No-HEF4894BTT,118 lacks hot-swap protection circuitry such as power-on reset, bus-hold, or Ioff. Applying VCC before GND, or connecting while powered, may cause latch-up or permanent damage. Board-level design must ensure proper power sequencing and avoid live insertion in field-replaceable modules.
HEF4894BTT,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 4000B
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- Shift Register
- Output Type:
- Open Drain
- Number of Elements:
- 1
- Number of Bits per Element:
- 12
- Function:
- Serial to Parallel, Serial
- Voltage - Supply:
- 3V ~ 15V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
HEF4894BTT,118 FAQ
1.How can I place an order for HEF4894BTT,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for HEF4894BTT,118 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 HEF4894BTT,118 reliable?
The price and inventory of HEF4894BTT,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HEF4894BTT,118 is usually 5 days.
3.What payment methods are accepted for HEF4894BTT,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HEF4894BTT,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HEF4894BTT,118?
HEF4894BTT,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HEF4894BTT,118 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 HEF4894BTT,118?
For technical support, including HEF4894BTT,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HEF4894BTT,118 requirements.
6.How does Aetrix verify that HEF4894BTT,118 is sourced from the original manufacturer or authorized distributors?
All HEF4894BTT,118 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 HEF4894BTT,118 meets industry standards.
7.What is the process for return or replacement of HEF4894BTT,118?
All HEF4894BTT,118 units undergo pre-shipment inspection (PSI). If there is an issue with HEF4894BTT,118, 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 HEF4894BTT,118 part is unused and in its original packaging.
Return procedure for HEF4894BTT,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HEF4894BTT,118 Tags
-
SN74HC164DR
Texas Instruments
-
SN74HC595DR
Texas Instruments
-
74HC595PW,118
Nexperia USA Inc.
-
SN74HC165PWR
Texas Instruments
-
HEF4094BT,653
Nexperia USA Inc.
-
74HC595D,118
Nexperia USA Inc.
-
SN74HC595PWR
Texas Instruments
-
74HC165D,653
Nexperia USA Inc.
-
SN74LV165APWR
Texas Instruments
-
74HC595BQ,115
Nexperia USA Inc.
-
74HC165BQ,115
Nexperia USA Inc.
-
CD4094BPWR
Texas Instruments
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