SP8643A

The SP8643A is one member of the SP8643 series.The SP8643 is an ECL variable modulus divider, with ECL 1OK compatible outputs. It divides by 10 when either of the ECL control inputs,PE1 or PE2, is in the high state and by 11 when both are low (or open circuit).The two clock inputs are interchangeable and either will act as a clock inhibit when connected to an EGL high level.Normally, one input is left open circuit and the other is AC coupled, with externally-applied bias.

Features of the SP8643A are:(1)ECL compatible inputs/outputs; (2)AC coupled input (external bias).The clock and control inpuls are ECL III compatible.There is an internal pulldown resistor to VEE of 4.3k on each input and therefore any unused input can be leis open circuit when not in use but should be bypassed for RF signals with a 1nF capacitor to ensure maximum noise immunity.

The absolute maximum ratings of the SP8643A can be summarized as:(1)supply voltage:-8V;(2)output current:20mA;(3)Max clock I/P voltage:2.5V p-p;(4)junction temperature:175;(5)storage temperature:-55 to 150.The information given herein, including the specifications and dimensions, is subject to change without prior notice to improve product characteristics. Before ordering, purchasers are advised to contact the Sensitron Semiconductor sales department for the latest version of the datasheet(s).In cases where extremely high reliability is required (such as use in nuclear power control, aerospace and aviation, traffic equipment,medical equipment, and safety equipment), safety should be ensured by using semiconductor devices that feature assured safety or by means of users' fail-safe precautions or other arrangement.In no event shall Sensitron Semiconductor be liable for any damages that may result from an accident or any other cause during operation of the user's units according to the datasheet(s). Sensitron Semiconductor assumes no responsibility for any intellectual property claims or any other problems that may result from applications of information, products or circuits described in the datasheets.