THS789PFD - Quad-Channel 200MHz Time Measurement IC | TI
MPN: THS789PFD ✓ فعالTHS789PFD نمای کلی
A time measurement unit is a specialized clock-and-timing semiconductor that measures elapsed time by comparing reference events. A multi-channel TMU extends this function across several independent measurement paths, making it useful when a system must acquire timing relationships, delays, pulse widths, or event intervals without implementing each measurement function as discrete logic. The THS789 therefore belongs to the clock-and-timing IC category and the broader application-specific timing semiconductor hierarchy.
The principal verified specifications are four measurement channels, a 200 MHz timing reference, and one output. The 200 MHz reference corresponds to a 5 ns reference period, while the quad-channel architecture permits parallel timing observations. The 100-pin HTQFP package provides numerous external connections for timing inputs, control, power, and outputs, while the exposed pad supports heat transfer from the device to the PCB.
The THS789PFD is specifically identified as a Time Measurement IC and is marketed by DigiKey under the Application Specific Clock/Timing classification. This distinguishes it from conventional general-purpose timers by emphasizing precision event-interval measurement across four channels. The exact input voltage range, minimum measurable interval, timing accuracy, propagation delay, output characteristics, and power specifications are not included in the supplied verified excerpts and should be taken from the complete manufacturer datasheet before design release.
Typical engineering uses include industrial automation equipment, communications timing analysis, instrumentation, automated test systems, and embedded systems that compare multiple event arrivals. The 100-pin package and exposed pad make careful PCB layout, grounding, and thermal management important. In multi-channel systems, signal integrity at the timing inputs can materially affect measurement consistency, so controlled impedance, short return paths, and clean reference distribution should be prioritized.
A principal design trade-off is package size versus channel density: the 14 mm by 14 mm HTQFP offers extensive connectivity for four timing channels but requires more PCB area than a compact mixed-signal package. Engineers should also confirm the complete electrical limits and interface timing before substituting another device or extending the operating temperature beyond the verified 0 °C to 70 °C range.
This product record combines verified manufacturer and distributor identity, package and ordering information, commercial availability, and explicit engineering guidance for evaluating the THS789PFD. It also distinguishes confirmed facts from parameters that still require review in the full Texas Instruments datasheet, supporting faster procurement and design planning without treating unverified specifications as guaranteed.
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درخواست جایگزینTHS789PFD مشخصات
| Product Type | Quad-Channel Time Measurement Unit (TMU) |
| Manufacturer | Texas Instruments |
| Maximum Timing Frequency | 200 MHz |
| Number of Measurement Channels | 4 channels |
| تعداد خروجی‌ها | 1 output |
| Reference Period | 5 ns at 200 MHz |
| محدوده دمای کاری | 0 °C to 70 °C |
| Temperature Grade | Commercial |
| بسته‌بندی | 100-pin HTQFP with exposed pad |
| Package Dimensions | 14 mm × 14 mm |
| نوع نصب | Surface mount |
| Package Shape | Square |
| Number of Terminals | 100 terminals |
| Shipping Package | Tray |
| Verified Unit Price | $90.0050 as of 2026-10-29 |
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پیکربندی پین برای THS789PFD (پکیج tray). شماره‌گذاری پایه‌ها، عملکردها و نمودارهای اتصال در دیتاشیت سازنده تعریف شده است. برای footprint دقیق و دستورالعمل‌های لحیم‌کاری به آن مراجعه کنید.
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کاربردهای معمول
THS789PFD مناسب است برای 6 کاربردs: Industrial Automation Timing, Communications Timing Analysis, Automated Test Equipment, Precision Instrumentation, Embedded Event Timing, Time-Domain Diagnostics.
Industrial Automation Timing
The THS789PFD fits industrial automation systems that need to compare several machine events within one timing-measurement device. Its four channels support parallel observation of sensor transitions, actuator commands, or controller outputs, while the 200 MHz reference provides a nominal 5 ns period. This can simplify a multi-point timing architecture compared with using several unrelated timer blocks. The 100-pin HTQFP also provides substantial connectivity for multiple inputs and shared control. Before finalizing a design, verify input thresholds, minimum measurable interval, propagation delay, and trigger behavior from the complete Texas Instruments datasheet.
Communications Timing Analysis
The THS789PFD is appropriate for communications equipment that must characterize relative timing among several signal paths. Four measurement channels can observe arrivals or transitions from different sources, and the 200 MHz reference establishes a 5 ns nominal timing interval for the device. The single output still permits a compact system architecture when the primary requirement is measurement rather than multiple event-generation outputs. High-speed or long-trace implementations need controlled impedance, low loop area, and an uninterrupted ground plane. The verified excerpts do not provide input bandwidth, jitter, or channel-to-channel skew, so those limits must be checked before applying the part to high-speed links.
Automated Test Equipment
The THS789PFD can support automated test equipment that measures pulse widths, event delays, or timing relationships across several test points. Its quad-channel time-measurement architecture can reduce the number of dedicated timing resources required by an instrument, while the 200 MHz reference supplies a fixed timing basis. The large 100-pin HTQFP package offers enough connectivity for multiple captured timing signals and control functions. For production test systems, designers should account for synchronization uncertainty, channel-to-channel variation, input capacitance, and fixture reflections. Exact timing resolution and calibration requirements are not included in the supplied data and must be confirmed from the manufacturer documentation.
Precision Instrumentation
The THS789PFD is suitable for precision measurement instruments where several external events must be evaluated relative to one another. Four channels permit timing comparisons across sensor outputs, reference markers, or trigger lines, and the 200 MHz reference corresponds to a nominal 5 ns period. Compared with a single-channel timer, the quad-channel device can reduce component count and simplify synchronization within a dedicated timing subsystem. Its 100-pin HTQFP footprint requires careful layout and a substantial exposed-pad thermal strategy. Engineers should verify analog and digital supply requirements, input logic levels, timing accuracy, and output timing from the complete datasheet because those values are not stated in the verified search excerpts.
Embedded Event Timing
The THS789PFD can serve embedded systems that need deterministic observation of several asynchronous events rather than general-purpose software timing. The four-channel TMU architecture allows hardware to capture or compare event intervals against a 200 MHz reference, providing a 5 ns nominal period before calibration and measurement error are considered. This is useful in machinery controls, specialized data-acquisition equipment, and embedded test fixtures. The commercial 0 °C to 70 °C rating must be checked against the enclosure temperature. Because verified information does not include operating current, power consumption, or thermal data, power-budget and thermal analysis should wait for those values from the manufacturer datasheet.
Time-Domain Diagnostics
The THS789PFD fits time-domain diagnostic systems that need to quantify pulse timing across multiple nodes. A 200 MHz reference supports timing observation with a nominal 5 ns period, and four channels allow the system to compare input arrivals, gate timing, or trigger relationships. This can support fault isolation in electronic systems and repeatable production diagnostics. The single output means the IC should not be treated as a four-output event generator; its primary role is measurement. Board-level signal integrity is critical because reflections and skew between channels can affect interpretation. Use short routes, continuous reference planes, and validated terminations, following the manufacturer’s complete layout recommendations when available.
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راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول |
|---|---|
| Product Type | Quad-Channel Time Measurement Unit |
| Brand | Texas Instruments |
| Package | 100-pin HTQFP with exposed pad |
| Package Dimensions | 14 mm × 14 mm |
| Maximum Timing Frequency | 200 MHz |
| Measurement Channels | 4 channels |
| Outputs | 1 output |
| Operating Temperature Range | 0 °C to 70 °C |
| Shipping Package | Tray |
| Verified Unit Price | $90.0050 as of 2026-10-29 |
تفاوت‌های کلیدی
- Dedicated four-channel time measurement (در مقابلGeneric single-channel timer IC)
- High timing reference frequency (در مقابلLower-frequency conventional timer IC)
- Extensive timing and control connectivity (در مقابلSmall-package general-purpose timer)
- Commercial operating range (در مقابلExtended-temperature timing IC)
یادداشت‌های طراحی
Treat the 100-pin HTQFP as a high-pin-count mixed-signal layout. Keep timing inputs short, avoid routing them across plane splits, and provide a continuous ground reference beneath the device. Place decoupling capacitors at the appropriate supply pins according to the complete manufacturer datasheet; the supplied excerpts do not specify capacitance values or placement distances, so those details should not be guessed.
The verified package includes an exposed pad and occupies a 14 mm × 14 mm square footprint. Follow the manufacturer’s exposed-pad land pattern and thermal-via recommendations rather than treating the pad as optional. No verified power dissipation, junction-temperature, or thermal-resistance figures were supplied, so a numerical junction-temperature estimate cannot be made without verified supply voltage, current, and thermal data.
The four timing channels should be routed with consistent geometry and matched reference paths so that channel-to-channel skew is predictable. Avoid long stubs, unnecessary test pads, and abrupt reference-plane changes. The 200 MHz timing reference establishes a nominal 5 ns period, but usable measurement bandwidth, input capacitance, and jitter specifications are not available in the supplied excerpts and must be verified before release.
Do not select a substitute based only on the words quad-channel timer. A valid replacement must preserve the 100-pin HTQFP footprint, exposed pad, pin assignments, supply requirements, timing reference, channel count, control interface, and output behavior. No verified same-footprint drop-in part was found, so using another IC without a manufacturer cross-reference and complete schematic review can create timing, power, and layout errors.
اطلاعات انطباق
The supplied verified excerpts identify the THS789PFD as a commercial-grade 0 °C to 70 °C IC but do not state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or AEC-Q100 status. AEC-Q100 is marked not_applicable because this is not an automotive-qualified variant.
