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Nexperia USA Inc. 74HCT193DB,112
- Part No.:
- 74HCT193DB,112
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Counters, Dividers
- Package:
- 16-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74HCT193DB,112.pdf
- Description:
- IC BINARY COUNTER 4-BIT 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,347
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Product details
Overview
74HCT193DB,112 from Nexperia is a TTL-level-compatible, presettable synchronous 4-bit binary up/down counter in SO16 (SOT109-1) package. It features separate CPU/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 programmable frequency dividers, digital timers, and cascaded multistage counters.
For engineers reviewing the 74HCT193DB,112 datasheet, 74HCT193DB,112 pinout, 74HCT193DB,112 application, or 74HCT193DB,112 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 extended temperature.
Technical Context
This device implements four edge-triggered D-type flip-flops with synchronous counting logic and independent up/down control paths. The CPU and CPD inputs are mutually exclusive - only one may be HIGH during operation to ensure deterministic state transitions. Count direction is determined solely by which clock line receives the LOW-to-HIGH edge while the other remains HIGH.
Terminal count outputs TCU and TCD replicate the respective clock waveforms (TCU mirrors CPU at max count 15; TCD mirrors CPD at min count 0), enabling direct connection to higher-order stage clocks without external gating. Asynchronous PL and MR override all clock activity and guarantee immediate state update within 65 ns (VCC = 4.5 V, –40 °C to +85 °C).
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) |
| Supply Voltage Range | 4.5 V to 5.5 V - matches standard 5 V systems with margin for rail tolerance |
| Operating Temperature | –40 °C to +125 °C - qualified for automotive under-hood and industrial control environments |
| Max Clock Frequency | 16 MHz @ –40 °C to +85 °C - supports real-time timing up to ~62.5 ns period |
| Propagation Delay (CPU → Qn) | 54 ns max @ VCC = 4.5 V, –40 °C to +85 °C - enables precise setup/hold timing in synchronous designs |
| Power Dissipation Capacitance | 26 pF - used to calculate dynamic power: PD = CPD × VCC² × fi × N |
| Output Drive Strength | ±4.0 mA @ VOH/VOL - sufficient to drive 10 LS-TTL loads or 20 CMOS inputs |
Pinout & Package
74HCT193DB,112 is supplied in SO16 plastic small outline package (SOT109-1), 16-pin, 3.9 mm body width, with standard JEDEC MS-012 footprint and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 9, 10, 15 (D0–D3) |
Data input | Asynchronous parallel load data bits; sampled on PL LOW regardless of clock state |
| 2, 3, 6, 7 (Q0–Q3) |
Counter output | 4-bit binary state (0–15); updated synchronously on CPU/CPD rising edge |
| 4 (CPD) | Count-down clock | LOW-to-HIGH edge triggers decrement; must be held HIGH when counting up |
| 5 (CPU) | Count-up clock | LOW-to-HIGH edge triggers increment; must be held HIGH when counting down |
| 8 (GND) | Ground reference | 0 V return path for all internal logic and I/O; decoupling capacitor required |
| 11 (PL) | Parallel load enable | Active LOW - forces immediate loading of D0–D3 into Q0–Q3, overriding clocks |
| 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 immediately, disabling clocks and PL |
| 16 (VCC) | Supply voltage | +4.5 V to +5.5 V power rail; requires local 100 nF ceramic decoupling |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous reversible counting | Independent CPU/CPD clocks eliminate race conditions and support bidirectional sequence control in real-time systems |
| Asynchronous parallel load | PL input loads D0–D3 into Q0–Q3 within 58 ns (max), enabling instant presetting without clock dependency |
| Asynchronous master reset | MR asserts Q0–Q3 = 0000 in ≤60 ns (max), providing deterministic initialization even mid-count |
| Waveform-duplicating terminal counts | TCU/TCD outputs mirror CPU/CPD edges - allows direct cascading to next-stage counters without glue logic |
| Industrial temperature range | Specified from –40 °C to +125 °C with full electrical performance - suitable for engine control, motor drives, and power converters |
Applications
| Digital Timer Module | Programmable Frequency Divider |
|---|---|
|
Use Scenario: A microcontroller configures initial count value via parallel load, then uses CPU/CPD to step through timed intervals (e.g., 100 ms, 500 ms) before triggering an interrupt on TCU/TCD. IC Role / Device Role / Timing Role: Standalone 4-bit timing engine; replaces software loop delays with hardware-accurate, jitter-free counting. Use Value: Enables sub-millisecond resolution timing without CPU overhead; TCU/TCD provide clean, edge-aligned interrupt signals. |
Use Scenario: Cascaded pair of 74HCT193DB,112 devices divides a 1 MHz system clock by variable factors (e.g., ÷12, ÷47) using parallel load to set divisor. IC Role / Device Role / Timing Role: Programmable prescaler stage; accepts reload values from host MCU and generates divided clock output via TCU. Use Value: Achieves arbitrary integer division ratios with single-cycle reconfiguration; eliminates need for fixed-ratio PLLs or FPGA logic. |
| Multistage Counter System | Industrial Sequence Controller |
|
Use Scenario: Four 74HCT193DB,112 ICs cascade via TCU→CPU connections to implement a 16-bit up/down counter for position tracking in CNC motion control. IC Role / Device Role / Timing Role: Modular counter stage; each handles 4 bits and propagates carry/borrow via waveform-duplicated TCU/TCD outputs. Use Value: Eliminates external AND/OR gates for carry generation; ensures monotonic, glitch-free propagation across stages. |
Use Scenario: Embedded PLC uses parallel load to initialize counter state (e.g., "step 13") after fault recovery, then steps forward/backward via pushbutton-driven CPU/CPD pulses. IC Role / Device Role / Timing Role: State sequencer core; MR resets to zero, PL presets to known step, and CPU/CPD advance/reverse process flow. Use Value: Provides deterministic, ESD-hardened sequencing without firmware intervention; supports manual operator override. |
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 |
|---|---|---|---|
| 74HC193D,653 | CMOS-level inputs (VIH ≥ 3.15 V @ VCC = 4.5 V); wider 2.0–6.0 V supply range | Requires level-shifting when interfacing with TTL or 3.3 V MCU GPIO; better for mixed-voltage systems | Select when operating below 4.5 V or integrating with 3.3 V logic families; avoid in pure 5 V TTL environments |
| SN74LS193N | Bipolar TTL technology; higher ICC (28 mA typical), lower fmax (25 MHz), no PL/TCD waveform duplication | Legacy board replacement only; lacks asynchronous parallel load timing guarantee and cascading TCU/TCD behavior | Use only for drop-in replacement on existing LS designs; not recommended for new designs due to power and timing limitations |
Compared with 74HC193D,653, the 74HCT193DB,112 offers guaranteed TTL compatibility and tighter timing at 5 V, while SN74LS193N trades power efficiency and modern cascading capability for legacy pinout alignment - making the HCT variant optimal for new 5 V industrial controllers requiring robust preset and ripple-cascade operation.
Availability
74HCT193DB,112 is available at Aetrix Electronics and suitable for digital timer modules, programmable frequency dividers, multistage counter systems, and industrial sequence controllers requiring stable component supply across automotive and industrial temperature ranges.
Supply support for 74HCT193DB,112 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, analog, and discrete components with focus on reliability, efficiency, and sustainability.
The 74HCT193 belongs to Nexperia's industry-standard 74-series logic family, designed specifically for robust, low-power, temperature-resilient digital control in automotive, industrial, and consumer equipment.
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 over –40 °C to +85 °C. This ensures proper internal flip-flop triggering and avoids metastability. Shorter pulses may result in missed counts or undefined output states, especially near temperature extremes.
Can PL and MR be asserted simultaneously, and what happens?
Yes - MR has priority over PL. When both are active (MR = HIGH, PL = LOW), the counter outputs Q0–Q3 are forced to 0000 immediately, and the parallel load data is ignored. MR overrides all inputs including clocks and data, ensuring deterministic reset behavior in fault-recovery sequences.
How does TCU behave when counting from 15 back to 0?
TCU goes LOW on the LOW-to-HIGH transition of CPU that advances the count from 15 to 0, and remains LOW until that same CPU signal returns HIGH - effectively duplicating the CPU waveform. This allows TCU to directly drive the CPU input of the next counter stage without additional edge-detection circuitry.
Is 74HCT193DB,112 pin-compatible with older 74LS193 variants?
No - while both are 16-pin DIP/SO packages with identical pin numbering for core signals (Q0–Q3, D0–D3, CPU, CPD, MR, PL, TCU, TCD, VCC, GND), the 74HCT193DB,112 uses SO16 (SOT109-1), whereas standard 74LS193N uses DIP-16. Footprint and thermal characteristics differ, requiring PCB layout revision for replacement.
74HCT193DB,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 16-SSOP (0.209", 5.30mm Width)
- Packaging:
- Bulk
- 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,112 FAQ
1.How can I place an order for 74HCT193DB,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT193DB,112 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,112 reliable?
The price and inventory of 74HCT193DB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT193DB,112 is usually 5 days.
3.What payment methods are accepted for 74HCT193DB,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT193DB,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT193DB,112?
74HCT193DB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT193DB,112 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,112?
For technical support, including 74HCT193DB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT193DB,112 requirements.
6.How does Aetrix verify that 74HCT193DB,112 is sourced from the original manufacturer or authorized distributors?
All 74HCT193DB,112 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,112 meets industry standards.
7.What is the process for return or replacement of 74HCT193DB,112?
All 74HCT193DB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT193DB,112, 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,112 part is unused and in its original packaging.
Return procedure for 74HCT193DB,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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