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NXP Semiconductors MC145152DW2
- Part No.:
- MC145152DW2
- Manufacturer:
- NXP Semiconductors
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MC145152DW2.pdf
- Description:
- IC PLL CLOCK/FREQ SYNTH 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,023
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Product details
Overview
MC145152DW2 from Freescale Semiconductor is a CMOS dual-modulus parallel-input PLL frequency synthesizer IC used in RF local oscillator generation for land mobile radios and cellular systems. It features 10-bit ÷N (3–1023), 6-bit ÷A (0–63), 8 selectable ÷R values (8–2048), lock detect output, and dual-phase detector outputs (φR/φV). It operates from 3.0–9.0 V and supports on-chip crystal oscillator or external reference input.
For engineers reviewing the MC145152DW2 datasheet, MC145152DW2 pinout, MC145152DW2 application, or MC145152DW2 equivalent, this page delivers verified technical context, real-world use cases in VHF/UHF radio synthesizers, confirmed pin functions, and validated alternative parts for frequency synthesis design.
Technical Context
The MC145152DW2 implements a dual-modulus prescaler interface with internal control logic generating the MC signal to drive external 64/65 or similar prescalers. Its programmable ÷N and ÷A counters enable total division ratio NT = N × P + A, supporting narrow-channel spacing (e.g., 5 kHz, 30 kHz) in mobile radio bands.
It integrates a linearized digital phase detector with double-ended φR/φV outputs and a three-state PDout, plus an on-chip reference oscillator circuit (OSCin/OSCout) compatible with parallel-resonant crystals. Lock detection (LD) provides active-high status synchronized to phase/frequency lock.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.0–9.0 V - Enables direct compatibility with legacy 5 V and 9 V radio power rails without regulation. |
| ÷N Range | 3 to 1023 - Sets maximum feedback division for VCO output frequency resolution and channel step size. |
| ÷A Range | 0 to 63 - Determines fine-tuning offset within dual-modulus cycle, critical for fractional-N equivalent behavior. |
| ÷R Options | 8, 64, 128, 256, 512, 1024, 1160, 2048 - Selects reference frequency division to set channel spacing (e.g., ÷R = 2048 with 15.36 MHz ref → 7.5 kHz step). |
| Operating Temp | −40°C to +85°C - Qualified for industrial and mobile radio environments including vehicle-mounted transceivers. |
| Input Frequency (fin) | Up to 25 MHz (dc-coupled square wave, VDD = 9 V) - Supports direct connection to high-speed prescaler outputs without level-shifting. |
| Phase Detector Outputs | φR and φV - Rail-to-rail complementary signals enabling flexible loop filter design with op-amp combiners. |
Pinout & Package
SOG package (Case 751F), 28-pin shrink small-outline gull-wing, surface-mountable with 0.050" lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (fin) | VCO/prescaler feedback input | AC- or DC-coupled frequency input to ÷N/÷A counters; accepts up to 25 MHz square wave at full supply rail. |
| 4–6 (RA0–RA2) | Reference divider address inputs | 3-bit code selecting one of eight ÷R values (e.g., RA2=0, RA1=1, RA0=1 → ÷R = 128). |
| 7 (φR) | Phase detector B output | Rail-to-rail low pulse when fV lags fR; used with φV for differential error signal generation. |
| 8 (φV) | Phase detector B output | Rail-to-rail low pulse when fV leads fR; complements φR for zero-crossing detection in locked state. |
| 9 (MC) | Dual-modulus control output | Active-low signal controlling external prescaler modulus switch (e.g., 64→65); timing defines N and A count sequence. |
| 10 (A5) | ÷A counter MSB input | Most significant bit of 6-bit A value; pull-up resistor ensures logic high if unconnected. |
| 11–20 (N0–N9) | ÷N counter programming inputs | 10-bit parallel load data (N0 = LSB); all pins have internal pull-ups for SPST switch programming. |
| 21–25 (A0–A4) | ÷A counter programming inputs | Five of six A bits (A0–A4); A5 is on pin 10; collectively define prescaler dwell time in lower modulus mode. |
| 26 (OSCout) | Crystal oscillator output | Drives one terminal of parallel-resonant crystal; requires external load capacitor to ground. |
| 27 (OSCin) | Crystal oscillator input / external ref input | Completes on-chip Pierce oscillator with crystal; also accepts AC/DC-coupled external reference clock. |
| 28 (LD) | Lock detect output | Active-high open-drain (with pull-up) signal indicating stable phase/frequency lock; pulses low on loss of lock. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-modulus parallel programming | Enables wide frequency coverage with fine resolution using external 64/65 or 128/129 prescalers - essential for UHF/VHF mobile radio bands. |
| On-chip reference oscillator | Reduces BOM count by integrating crystal driver circuitry; supports standard AT-cut crystals with external load caps. |
| Lock detect with active-high output | Provides immediate system-level feedback for PLL lock status - used for transmit enable gating and fault monitoring in radios. |
| Rail-to-rail φR/φV outputs | Delivers full-swing error signals compatible with standard op-amp loop filters without level-shifting or biasing networks. |
| Internal pull-up resistors on all data/address inputs | Allows direct SPST switch programming - eliminates external pull-ups and simplifies front-panel channel selector designs. |
Applications
| VHF Land Mobile Radio | UHF Public Safety Radio |
|---|---|
|
Use Scenario: 150–174 MHz base station synthesizer with 5 kHz channel spacing. IC Role / Device Role / Timing Role: MC145152DW2 generates precise LO frequencies by dividing VCO output via dual-modulus prescaler (64/65), using ÷R = 64 and external 10.24 MHz crystal. Use Value: Achieves <100 Hz frequency error over temperature, enabling compliant adjacent-channel rejection in TIA-603 systems. |
Use Scenario: 450–470 MHz portable transceiver with 12.5 kHz steps and transmit/receive offset switching. IC Role / Device Role / Timing Role: MC145152DW2 drives 64/65 prescaler and provides MC control; LD output enables fast TX/RX switching with lock confirmation. Use Value: Guarantees sub-millisecond lock time and eliminates spurious emissions from unlocked VCO during mode transitions. |
| 800 MHz Cellular Base Station | Amateur Radio Transceiver |
|
Use Scenario: Computer-controlled 666-channel synthesizer for 825–845 MHz cellular uplink with 30 kHz spacing. IC Role / Device Role / Timing Role: MC145152DW2 implements N•64+A architecture with N = 429–440 and A = 0–63, referenced to 15.36 MHz crystal. Use Value: Delivers stable 1 ppm frequency accuracy across −30°C to +70°C, meeting FCC Part 22 spectral mask requirements. |
Use Scenario: Homebrew HF/VHF transceiver covering 1.8–144 MHz with crystal-ladder filtering and analog VCO. IC Role / Device Role / Timing Role: MC145152DW2 serves as main PLL engine, accepting external VCO feedback and driving loop filter via φR/φV combiner. Use Value: Simplifies design with integrated reference oscillator and lock detect - reduces external component count by ≥7 parts vs discrete solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PLL frequency synthesizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC145152P2 | Same die, plastic DIP package (Case 710), through-hole mounting, higher thermal resistance (−12 mW/°C derating above 65°C). | Preferred for prototyping, lab testing, or legacy through-hole PCBs where reflow compatibility is not required. | Select MC145152P2 only when manual assembly or socket-based evaluation is needed; MC145152DW2 is optimal for volume SMT production. |
| CD4046BE | Single-modulus CMOS PLL with VCO, no ÷N/÷A programming, no lock detect, no dual-phase outputs; max fin = 1.2 MHz. | Limited to low-frequency applications (e.g., tone generators, basic clock recovery); cannot replace MC145152DW2 in radio synthesizers. | CD4046BE is not a functional substitute - use only for educational or non-radio timing applications requiring integrated VCO. |
Compared with MC145152P2, the MC145152DW2 offers superior thermal performance in SMT layouts and smaller footprint; compared with CD4046BE, it delivers full dual-modulus synthesis capability, lock monitoring, and RF-grade input bandwidth - making it irreplaceable in professional mobile radio designs.
Availability
MC145152DW2 is available at Aetrix Electronics and suitable for VHF/UHF land mobile radios, public safety transceivers, 800 MHz cellular infrastructure, and amateur radio synthesizers requiring stable component supply and long-term obsolescence management.
Supply support for MC145152DW2 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
Freescale Semiconductor (now part of NXP Semiconductors) is a global leader in automotive, industrial, and communications semiconductors, known for high-reliability analog and mixed-signal ICs.
The MC145152DW2 belongs to Freescale's legacy CMOS frequency synthesizer product line, designed specifically for cost-sensitive, high-volume RF systems requiring robust PLL performance in mobile and portable radio equipment.
FAQ
What is the maximum input frequency supported by the MC145152DW2 fin pin?
The MC145152DW2 supports up to 25 MHz on the fin pin when driven by a DC-coupled square wave at VDD = 9 V. At VDD = 5 V, the guaranteed limit is 22 MHz, and at VDD = 3 V, it drops to 12 MHz. These values assume proper signal integrity and termination to avoid ringing-induced false triggering.
Does the MC145152DW2 include an on-chip crystal oscillator?
Yes, the MC145152DW2 includes a fully integrated Pierce oscillator circuit between OSCin and OSCout pins. When connected to a parallel-resonant crystal and appropriate load capacitors (typically 15–30 pF each to ground), it generates a stable reference clock without external components.
How does the MC145152DW2 generate its lock detect signal?
The MC145152DW2 generates the LD signal internally by comparing phase and frequency coincidence between fR (reference) and fV (feedback). When both match in frequency and phase, LD asserts high; loss of lock causes LD to pulse low. The output is open-drain and requires an external pull-up resistor.
Can the MC145152DW2 be used with single-modulus prescalers?
No - the MC145152DW2 is specifically architected for dual-modulus operation (e.g., 64/65, 128/129) and lacks the internal logic to support single-modulus configurations. For single-modulus applications, Freescale's MC145151-2 series (e.g., MC145151DW2) is the correct family member.
What are the key differences between MC145152DW2 and MC145152P2?
The MC145152DW2 and MC145152P2 share identical silicon and electrical specifications but differ in packaging: DW2 uses SOG (Case 751F), while P2 uses plastic DIP (Case 710). The SOG version offers better thermal dissipation for SMT layouts and smaller board area, whereas the DIP version supports breadboarding and socket-based development.
MC145152DW2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- PLL Clock/Frequency Synthesizer
- PLL:
- Yes
- Input:
- Clock
- Output:
- CMOS
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 1:1
- Differential - Input:Output:
- No/No
- Frequency - Max:
- 25MHz
- Divider/Multiplier:
- Yes/No
- Voltage - Supply:
- 3V ~ 9V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 28-SOIC
MC145152DW2 FAQ
1.How can I place an order for MC145152DW2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC145152DW2 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 MC145152DW2 reliable?
The price and inventory of MC145152DW2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC145152DW2 is usually 5 days.
3.What payment methods are accepted for MC145152DW2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC145152DW2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC145152DW2?
MC145152DW2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC145152DW2 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 MC145152DW2?
For technical support, including MC145152DW2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC145152DW2 requirements.
6.How does Aetrix verify that MC145152DW2 is sourced from the original manufacturer or authorized distributors?
All MC145152DW2 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 MC145152DW2 meets industry standards.
7.What is the process for return or replacement of MC145152DW2?
All MC145152DW2 units undergo pre-shipment inspection (PSI). If there is an issue with MC145152DW2, 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 MC145152DW2 part is unused and in its original packaging.
Return procedure for MC145152DW2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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