ON Semiconductor

The MC100LVEP14 is a low skew 1 to 5 differential driver, designed with clock distribution in mind, accepting two clock sources into an input multiplexer. The ECL/PECL input signals can be either differential or single-ended (if the VBB output is used). HSTL inputs can be used when the LVEP14 is operating under PECL conditions.

The MC10LVEP16 is a world-class differential receiver/driver. The device is functionally equivalent to the EL16, EP16 and LVEL16 devices. With output transition times significantly faster than the EL16 and LVEL16, the LVEP16 is ideally suited for interfacing with high frequency and low voltage (2.5 V) sources. Single ended input operation is limited to a VCC>= 3.0 V in PECL mode, or VEE<= 3.0 V in NECL mode.The VBBpin, an internally generated voltage supply, is available to this device only. For single-ended input conditions, the unused differential input is connected to VBBas a switching reference voltage. VBBmay also rebias AC coupled inputs. When used, decouple VBBand VCCvia a 0.01 uF capacitor and limit current sourcing or sinking to 0.5 mA. When not used, VBBshould be left open.The 100 Series contains temperature compensation.

The MC100LVEL39 is a low skew 2/4, 4/6 clock generation chip designed explicitly for low skew clock generation applications. The internal dividers are synchronous to each other, therefore, the common output edges are all precisely aligned. The device can be driven by either a differential or single-ended input signal. In addition, by using the VBB output, a sinusoidal source can be AC coupled into the device.The common enable (ENbar) is synchronous so that the internal dividers will only be enabled/disabled when the internal clock is already in the LOW state. This avoids any chance of generating a runt clock pulse on the internal clock when the device is enabled/disabled as can happen with an asynchronous control. An internal runt pulse could lead to losing synchronization between the internal divider stages. The internal enable flip-flop is clocked on the falling edge of the input clock, therefore, all associated specification limits are referenced to the negative edge of the clock input.Upon startup, the internal flip-flops will attain a random state; therefore, for systems which utilize multiple LVEL39s, the master reset (MR) input must be asserted to ensure synchronization. For systems which only use one LVEL39, the MR pin need not be exercised as the internal divider design ensures synchronization between the 2/4 and the 4/6 outputs of a single device.The VBBpin, an internally generated voltage supply, is available to this device only. For single-ended input conditions, the unused differential input is connected to VBBas a switching reference voltage. VBBmay also rebias AC coupled inputs. When used, decouple VBBand VCCvia a 0.01 F capacitor and limit current sourcing or sinking to 0.5 mA. When not used, VBBshould be left open.