Mfr Part #:

SP8793

Mfr Name: Plessey

The Plessey SP8793 is a low power, programmable two modulus prescaler counter. It operates up to 225MHz and divides by 40 or 41 based on the control input.

✓ Total Stock: 2,014 pcs

SP8793 Available from 1 distributor

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✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Optech Co.,Limited ✓ Non-Authorised Inventory information	2,014 pcs On Request	2014 pcs	On Request	1	On Request	On Request	24+	On Request	On Request

SP8793 Specifications Quick View

Most important parameters for selection – full specs in datasheet.

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Category	New Products
Manufacturer Name	Plessey
Counter	40/41
Frequency	225MHz
Input Impedance	Function of frequency
Slew Rate	20V/µs
Temperature Range	-40°C to +85°C

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SP8793 Description

Short technical summary and product information.

The Plessey SP8793 is a versatile two modulus prescaler counter designed for low power applications. It offers a programmable divide ratio of 40 or 41, selectable via a control input. The device can operate at frequencies up to 225MHz.

Key electrical characteristics include an open collector output stage that can interface with CMOS logic. For TTL interfacing, specific pin connections are required. The SP8793 supports operation down to DC, provided a slew rate better than 20V/µs is maintained. The mark space ratio is approximately 1.2:1 at 200MHz.

An internal voltage regulator allows operation from a wide range of supply voltages, including specific configurations for 5.2V and a range of +6.8V to +9.5V. The operating temperature range for the standard version is -40°C to +85°C, with an "A" version available in a ceramic case offering an extended range of -55°C to +125°C.

Input impedance is frequency-dependent. To prevent self-oscillation when no signal is present, a 150kΩ resistor can be connected between an unused input and ground, reducing input sensitivity by 50-100mV p-p.

SP8793 Quick Information

Product Type: Counter

Canonical Name: SP8793 Two Modulus Prescaler

Subcategory: Two Modulus Prescaler

SP8793 Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

SP8793 Features

Programmable divide by 40/41 counter.
Operates up to 225MHz frequency.
Low power consumption.
Open collector output stage.
Wide supply voltage range supported.

SP8793 Applications

Frequency division circuits.
Prescaler for frequency counters.
RF signal processing.
Digital logic systems.

SP8793 FAQs

5 frequently asked questions generated from this part’s specifications.

What is the divide ratio of the SP8793 counter?

The SP8793 is a programmable counter that divides by 40 when the control input is high and by 41 when the control input is low.

What is the maximum operating frequency of the SP8793?

The SP8793 counter operates up to a maximum frequency of 225MHz.

What is the operating temperature range of the SP8793?

The standard operating temperature range is -40°C to +85°C. An "A" version with a ceramic case offers an extended range of -55°C to +125°C.

How can the SP8793 be interfaced with TTL logic?

For interfacing to TTL, pins 2 and 7 should be connected together. This increases supply current by approximately 2mA.

What supply voltages can the SP8793 operate from?

It can operate from a 5.2V supply (pins 7 and 8 connected) or from supply voltages in the range of +6.8V to +9.5V (pin 8 for supply, pins 7 and 8 separately decoupled).