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Nexperia USA Inc. 74HCT193DB,118
- Part No.:
- 74HCT193DB,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Counters, Dividers
- Package:
- 16-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74HCT193DB,118.pdf
- Description:
- IC BINARY COUNTER 4-BIT 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,491
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Product details
Overview
74HCT193DB,118 from Nexperia is a TTL-level-compatible, presettable synchronous 4-bit binary up/down counter in SO16 (SOT109-1) package. It features separate CPU and CPD clock inputs, asynchronous master reset (MR), asynchronous parallel load (PL), and active-low terminal count outputs (TCU/TCD). It operates from 4.5 V to 5.5 V across –40 °C to +125 °C and is used in digital timing control, cascaded multistage counters, and programmable logic sequencers.
For engineers reviewing the 74HCT193DB,118 datasheet, 74HCT193DB,118 pinout, 74HCT193DB,118 application, or 74HCT193DB,118 equivalent, key selection criteria include TTL input compatibility, guaranteed asynchronous load/reset timing, terminal count output waveform duplication for ripple-cascading, and SO16 thermal performance at industrial temperature extremes.
Technical Context
The device implements four edge-triggered D-type flip-flops with synchronous counting logic gated by CPU/CPD enable states. Count direction is determined solely by which clock input is pulsed while the other remains HIGH - no internal state machine or mode register is involved. TCU and TCD outputs replicate the respective clock edges at terminal states (15→0 and 0→15), enabling direct connection to higher-order stage clocks without external gating.
Asynchronous functions (MR, PL) override all clock activity and complete within ≤60 ns at VCC = 4.5 V. Input clamping diodes allow safe interfacing to voltages exceeding VCC when current-limiting resistors are used. The design complies with JEDEC JESD7A and JESD8C standards and supports HBM ESD >2000 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74HCT - TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V @ VCC = 4.5–5.5 V) |
| Count Width & Direction | 4-bit binary, fully synchronous up/down with independent CPU/CPD edge-triggered clocks |
| Supply Voltage Range | 4.5 V to 5.5 V - ensures stable operation in 5 V systems with ±5 % rail tolerance |
| Operating Temperature | –40 °C to +125 °C - qualified for automotive under-hood and industrial control environments |
| Max Clock Frequency | 16 MHz at –40 °C to +85 °C - defines maximum reliable counting rate in worst-case ambient |
| Propagation Delay | CPU/CPD to Qn: ≤54 ns (max) @ VCC = 4.5 V, –40 °C to +85 °C - sets minimum clock period for timing margin |
| Terminal Count Outputs | TCU/TCD active LOW, edge-duplicated - enables direct cascade clocking without added inverters or delay matching |
Pinout & Package
74HCT193DB,118 is housed in a plastic small outline package (SO16), SOT109-1, with 16 leads and 3.9 mm body width. Pin 1 is marked by a notch or dot; the package is RoHS-compliant and rated for reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 9, 10, 15 | D0–D3 | Data inputs for asynchronous parallel load - sampled on PL LOW regardless of clock state |
| 2, 3, 6, 7 | Q0–Q3 | Flip-flop outputs - reflect current count value; drive standard CMOS loads |
| 4 | CPD | Count-down clock - LOW-to-HIGH edge triggers decrement only if CPU = HIGH |
| 5 | CPU | Count-up clock - LOW-to-HIGH edge triggers increment only if CPD = HIGH |
| 8 | GND | Ground reference - must be low-impedance return path for all internal switching currents |
| 11 | PL | Asynchronous parallel load enable - active LOW; overrides counting and resets output metastability |
| 12 | TCU | Terminal count up - active LOW pulse synchronized to CPU edge at count = 15 → 0 transition |
| 13 | TCD | Terminal count down - active LOW pulse synchronized to CPD edge at count = 0 → 15 transition |
| 14 | MR | Master reset - active HIGH; forces Q0–Q3 = 0000 and disables PL/CPU/CPD until deasserted |
| 16 | VCC | Positive supply - must be decoupled locally (≤100 nF ceramic) near pin 16 to suppress switching noise |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous reversible counting | Eliminates ripple carry delay between bits - all Q0–Q3 change simultaneously on clock edge |
| Asynchronous parallel load | Enables instant preset to any 4-bit value without waiting for clock edge or clearing first |
| Asynchronous master reset | Guarantees deterministic zero-state initialization independent of clock phase or frequency |
| Expandable terminal count outputs | TCU/TCD replicate CPU/CPD waveforms - allows multi-stage counters without external logic or timing skew compensation |
| TTL-compatible inputs | Accepts standard 5 V TTL logic levels directly - no level-shifting required in mixed-logic systems |
Applications
| Digital Timing Control | Cascaded Multistage Counter |
|---|---|
Use Scenario: Generating precise time intervals in microcontroller-peripheral interfaces where software polling is too slow or resource-intensive. IC Role / Device Role / Timing Role: Hardware-based 4-bit interval timer with programmable start value and direction, triggered by MCU GPIO pulses. Use Value: Reduces CPU interrupt load and jitter; enables sub-microsecond timing resolution via hardware edge detection on TCU/TCD. | Use Scenario: Building an 8-bit or 12-bit up/down counter using two or three 74HCT193DB,118 devices in series. IC Role / Device Role / Timing Role: Lower-order stage counter providing carry/borrow signals to clock the next higher-order stage. Use Value: TCU/TCD outputs directly drive CPU/CPD of the next IC - eliminates external AND/OR gates and preserves edge alignment across stages. |
| Programmable Logic Sequencer | Industrial Motion Control Indexer |
Use Scenario: Controlling sequence steps in relay-based automation panels where step count must be loaded, incremented, decremented, and reset on demand. IC Role / Device Role / Timing Role: State register and transition engine - PL loads initial step, MR clears fault condition, CPU/CPD advance or reverse process flow. Use Value: Asynchronous load/reset ensures immediate recovery from error states without cycle loss or race conditions. | Use Scenario: Tracking motor position in open-loop stepper systems requiring bidirectional counting with preset home position. IC Role / Device Role / Timing Role: Position register synchronized to step/direction pulses from motion controller; TCU/TCD signal limit switches or index markers. Use Value: Active-low terminal outputs interface directly to PLC inputs or optocouplers - no external pull-ups needed for industrial I/O voltage levels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-bit synchronous up/down counter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HC193DB,118 | CMOS-level inputs (VIH ≥ 3.15 V @ VCC = 4.5 V); wider 2.0–6.0 V supply range | Better suited for mixed-voltage systems (e.g., 3.3 V control + 5 V peripherals) but requires level translation when driven by TTL | Select when system uses CMOS logic families or variable supply rails; avoid in pure 5 V TTL environments without buffering |
| SN74LS193N | Bipolar TTL technology; higher ICC (40 mA typical), slower max frequency (25 MHz), no TCU/TCD waveform duplication | Legacy board replacement only; lacks SO16 packaging and industrial temp rating | Use only for direct drop-in replacement on through-hole designs; not recommended for new designs due to power and thermal limitations |
Compared with 74HC193DB,118 and SN74LS193N, the 74HCT193DB,118 uniquely balances TTL input compatibility, SO16 footprint, industrial temperature support, and true edge-duplicated terminal outputs - making it optimal for modern 5 V embedded controllers requiring robust, cascadable counting without glue logic.
Availability
74HCT193DB,118 is available at Aetrix Electronics and suitable for digital timing control, cascaded multistage counters, and programmable logic sequencers requiring stable component supply across automotive, industrial, and test equipment lifecycles.
Supply support for 74HCT193DB,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
Nexperia is a global semiconductor expert delivering high-performance logic, discrete, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in high-volume applications.
The 74HCT193 belongs to Nexperia's industry-standard 74-series logic portfolio, designed specifically for robust, pin-compatible replacements in legacy 5 V digital systems requiring extended temperature operation and low-power CMOS architecture.
FAQ
What is the minimum pulse width required on CPU or CPD for reliable counting?
The minimum HIGH or LOW pulse width on CPU or CPD is 25 ns at VCC = 4.5 V and –40 °C to +85 °C. This ensures proper internal flip-flop triggering without metastability. Shorter pulses may cause missed counts or inconsistent behavior, especially under temperature stress or voltage droop.
Can PL and MR be asserted simultaneously, and what happens?
Yes - MR (active HIGH) takes priority over PL (active LOW). When both are asserted, MR forces Q0–Q3 = 0000 immediately and disables PL functionality. Outputs remain at zero until MR is deasserted, after which PL can load new data on the next LOW assertion.
How does the device behave when both CPU and CPD are held HIGH?
With both CPU and CPD HIGH, the counter holds its current state - no counting occurs. This is a stable quiescent condition. However, if either clock input transitions while the other is not held HIGH, unpredictable counting or metastability may result; the datasheet mandates only one clock HIGH at a time.
Is the SO16 package (SOT109-1) compatible with standard 0.050" pitch PCB footprints?
Yes - SOT109-1 has 1.27 mm (0.050") lead pitch, 3.9 mm body width, and JEDEC MS-012 compliance. It matches standard SOIC-16 footprints used in automated assembly. Thermal pad is not present; standard reflow profiles for plastic SO packages apply.
74HCT193DB,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 16-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Binary Counter
- Direction:
- Up, Down
- Number of Elements:
- 1
- Number of Bits per Element:
- 4
- Reset:
- Asynchronous
- Timing:
- Synchronous
- Count Rate:
- 43 MHz
- Trigger Type:
- Positive Edge
- Voltage - Supply:
- 4.5 V ~ 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
74HCT193DB,118 FAQ
1.How can I place an order for 74HCT193DB,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT193DB,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 74HCT193DB,118 reliable?
The price and inventory of 74HCT193DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT193DB,118 is usually 5 days.
3.What payment methods are accepted for 74HCT193DB,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT193DB,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT193DB,118?
74HCT193DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT193DB,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 74HCT193DB,118?
For technical support, including 74HCT193DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT193DB,118 requirements.
6.How does Aetrix verify that 74HCT193DB,118 is sourced from the original manufacturer or authorized distributors?
All 74HCT193DB,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 74HCT193DB,118 meets industry standards.
7.What is the process for return or replacement of 74HCT193DB,118?
All 74HCT193DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT193DB,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 74HCT193DB,118 part is unused and in its original packaging.
Return procedure for 74HCT193DB,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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