MOTOROLA Manuals (Industrial)

The EL57 is a fully differential 4:1 multiplexer which can also be used as a differential 2:1 multiplexer with the SEL0 input selecting between D0 and D1. The EL57’s fully differential architecture makes it ideal for use in low skew applications such as clock distribution. SEL1 is the most significant select line. The binary number applied to the select inputs will select the same numbered data input (i.e., 00 selects D0). Multiple VBB outputs are provided for single-ended or AC coupled interfaces. In these scenarios, the VBB output should be connected to the data bar inputs and bypassed via a 0.01µF capacitor to ground. Note that the VBB output can source/sink up to 0.5mA of current without upsetting the voltage level.

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The MC10E457/100E457 is a 3-bit differential 2:1 multiplexer. The fully differential data path makes the device ideal for multiplexing low skew clock or other skew sensitive signals. Multiple VBB pins are provided to ease AC coupling input signals. The higher frequency outputs provide the device with a >1.0GHz bandwidth to meet the needs of the most demanding system clock. Both, separate selects and a common select, are provided to make the device well suited for both data path and random logic applications. The differential inputs have internal clamp structures which will force the Q output of a gate in an open input condition to go to a LOW state. Thus, inputs of unused gates can be left open and will not affect the operation of the rest of the device. Note that the input clamp will take affect only if both inputs fall 2.5V below VCC.

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The MC10E/100E452 is a 5-bit differential register with differential data (inputs and outputs) and clock. The registers are triggered by a positive transition of the positive clock (CLK) input. A high on the Master Reset (MR) asynchronously resets all registers so that the Q outputs go LOW. The differential input structures are clamped so that the inputs of unused registers can be left open without upsetting the bias network of the device. The clamping action will assert the D and the CLK sides of the inputs. Because of the edge triggered flip-flop nature of the device simultaneously opening both the clock and data inputs will result in an output which reaches an unidentified but valid state. Note that the input clamps only operate when both inputs fall to 2.5V below VCC. The fully differential design of the device makes it ideal for very high frequency applications where a registered data path is necessary.

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The MC10E/100E452 is a 5-bit differential register with differential data and clock. It features edge-triggered flip-flops and is suitable for high-frequency applications.

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The MC10/100E445 is an integrated 4-bit serial to parallel data converter. The device is designed to operate for NRZ data rates of up to 2.0Gb/s. The chip generates a divide by 4 and a divide by 8 clock for both 4-bit conversion and a two chip 8-bit conversion function. The conversion sequence was chosen to convert the first serial bit to Q0, the second to Q1 etc.

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The MC10E/100E431 is a 3-bit flip-flop with differential clock, data input and data output. The asynchronous Set and Reset controls are edge-triggered rather than level controlled. This allows the user to rapidly set or reset the flip-flop and then continue clocking at the next clock edge, without the necessity of de-asserting the set/reset signal (as would be the case with a level controlled set/reset). The E431 is also designed with larger internal swings, an approach intended to minimize the time spent crossing the threshold region and thus reduce the metastability susceptibility window. The differential input structures are clamped so that the inputs of unused registers can be left open without upsetting the bias network of the device. The clamping action will assert the D and the CLK sides of the inputs. Because of the edge triggered flip-flop nature of the device simultaneously opening both the clock and data inputs will result in an output which reaches an unidentified but valid state. Note that the input clamps only operate when both inputs fall to 2.5V below VCC.

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The MC10E/100E431 is a 3-bit edge-triggered flip-flop. The device has 3 data input pins, 3 data output pins, 1 clock input pin, 1 data set input pin, and 1 data reset input pin. The clock and data inputs are differential. This allows the device to have a larger swing and faster switching speed. The device also has input clamp functions to prevent the device from generating bias voltages when it is not in use. When the data or clock inputs are short-circuited, the device will output a determined state.

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MC10E416/100E416 is a 5-bit differential line receiving device with a 2.0GHz bandwidth high frequency output, making it ideal for buffering of very high speed oscillators.

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The MC10E416/100E416 is a 5-bit differential line receiving device. The 2.0GHz of bandwidth provided by the high frequency outputs makes the device ideal for buffering of very high speed oscillators. A VBB pin is available to AC couple an input signal to the device. The design incorporates two stages of gain, internal to the device, making it an excellent choice for use in high bandwidth amplifier applications. The differential inputs have internal clamp structures which will force the Q output of a gate in an open input condition to go to a LOW state. Thus, inputs of unused gates can be left open and will not affect the operation of the rest of the device.

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The MC100EL1648 is a low power voltage controlled oscillator that can be used in many applications requiring a fixed frequency clock. It is based on the VCO circuit topology of the MC1648 and is realized using Motorola's MOSAIC III advanced bipolar process technology, allowing it to operate at a higher frequency while consuming less current compared to the MC1648. The MC100EL1648 features ECL output circuitry with an on-chip termination resistor, enabling direct AC-coupling of the output signal into a transmission line.

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The MC10EL/100EL15 is a low skew 1:4 clock distribution chip designed explicitly for low skew clock distribution applications. The device can be driven by either a differential or single-ended ECL or, if positive power supplies are used, PECL input signal. If a single-ended input is to be used the VBB output should be connected to the CLK input and bypassed to ground via a 0.01µF capacitor. The VBB output is designed to act as the switching reference for the input of the EL15 under single-ended input conditions, as a result this pin can only source/sink up to 0.5mA of current. The EL15 features a multiplexed clock input to allow for the distribution of a lower speed scan or test clock along with the high speed system clock. When LOW (or left open and pulled LOW by the input pulldown resistor) the SEL pin will select the differential clock input. The common enable (EN) is synchronous so that the outputs will only be enabled/disabled when they are already in the LOW state. This avoids any chance of generating a runt clock pulse when the device is enabled/disabled as can happen with an asynchronous control. The internal 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.

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The MC10EL/100EL15 is a low skew 1:4 clock distribution chip designed explicitly for low skew clock distribution applications. The device can be driven by either a differential or single-ended ECL or, if positive power supplies are used, PECL input signal. If a single-ended input is to be used the VBB output should be connected to the CLK input and bypassed to ground via a 0.01µF capacitor. The VBB output is designed to act as the switching reference for the input of the EL15 under single-ended input conditions, as a result this pin can only source/sink up to 0.5mA of current. The EL15 features a multiplexed clock input to allow for the distribution of a lower speed scan or test clock along with the high speed system clock. When LOW (or left open and pulled LOW by the input pulldown resistor) the SEL pin will select the differential clock input. The common enable (EN) is synchronous so that the outputs will only be enabled/disabled when they are already in the LOW state. This avoids any chance of generating a runt clock pulse when the device is enabled/disabled as can happen with an asynchronous control. The internal 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. • 50ps Output-to-Output Skew • Synchronous Enable/Disable • Multiplexed Clock Input • 75kΩ Internal

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MC100LVEL/100EL14 is a low-skew 1:5 clock distribution chip designed specifically for low-skew clock distribution applications. The device can be driven by either a differential or single-ended ECL or, if positive power supplies are used, PECL input signal. The LVEL14 is functionally and pin compatible with the EL14, but is designed to operate in ECL or PECL mode for a voltage supply range of –3.0V to –3.8V ( or 3.0V to 3.8V). If a single-ended input is to be used, the VBB output should be connected to the CLK input and bypassed to ground via a 0.01µF capacitor. The VBB output is designed to act as the switching reference for the input of the LVEL14 under single-ended input conditions, as a result this pin can only source/sink up to 0.5mA of current. The LVEL14 features a multiplexed clock input to allow for the distribution of a lower speed scan or test clock along with the high speed system clock. When LOW (or left open and pulled LOW by the input pulldown resistor) the SEL pin will select the differential clock input. The common enable (EN) is synchronous so that the outputs will only be enabled/disabled when they are already in the LOW state. This avoids any chance of generating a runt clock pulse when the device is enabled/disabled as can happen with an asynchronous control. The internal flip flop is clocked on the falling edge of the input clock, therefore all associated outputs must be clocked on the rising edge of the clock.

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MC100LVEL/100EL14 is a low skew 1:5 clock distribution chip designed explicitly for low skew clock distribution applications. The device can be driven by either a differential or single-ended ECL or, if positive power supplies are used, PECL input signal. The LVEL14 is functionally and pin compatible with the EL14 but is designed to operate in ECL or PECL mode for a voltage supply range of –3.0V to –3.8V ( or 3.0V to 3.8V). If a single-ended input is to be used the VBB output should be connected to the CLK input and bypassed to ground via a 0.01µF capacitor. The VBB output is designed to act as the switching reference for the input of the LVEL14 under single-ended input conditions, as a result this pin can only source/sink up to 0.5mA of current. The LVEL14 features a multiplexed clock input to allow for the distribution of a lower speed scan or test clock along with the high speed system clock. When LOW (or left open and pulled LOW by the input pulldown resistor) the SEL pin will select the differential clock input. The common enable (EN) is synchronous so that the outputs will only be enabled/disabled when they are already in the LOW state. This avoids any chance of generating a runt clock pulse when the device is enabled/disabled as can happen with an asynchronous control. The internal flip flop is clocked on the falling edge of the input clock, therefore all associated outputs are latched to the LOW state.

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The MC100LVEL13 is a dual, fully differential 1:3 fanout buffer from Motorola. The MC100EL13 is pin and functionally equivalent to the MC100LVEL13 but is specified for operation at the standard 100E ECL voltage supply. The Low Output-Output Skew of the device makes it ideal for distributing two different frequency synchronous signals. The differential inputs have special circuitry which ensures device stability under open input conditions. When both differential inputs are left open the D input will pull down to VEE, The D input will bias around VCC/2 and the Q output will go LOW. • Differential Inputs and Outputs • 20-Lead SOIC Packaging • 500ps Typical Propagation Delays • 50ps Output-Output Skews • Supports Both Standard and Low Voltage 100K ECL • >2000V ESD Protection.

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The MC100LVEL13 is a dual, fully differential 1:3 fanout buffer from Motorola. The MC100EL13 is pin and functionally equivalent to the MC100LVEL13 but is specified for operation at the standard 100E ECL voltage supply. The Low Output-Output Skew of the device makes it ideal for distributing two different frequency synchronous signals. The differential inputs have special circuitry which ensures device stability under open input conditions. When both differential inputs are left open the D input will pull down to VEE, The D input will bias around VCC/2 and the Q output will go LOW.

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The MC10EL/100EL12 is a low impedance drive buffer with two pairs of OR/NOR outputs, ideally suited for high drive applications such as memory addressing. The device is a function equivalent to the E112 device with higher performance capabilities. With propagation delays significantly faster than the E112, the EL12 is ideally suited for applications that require the ultimate in AC performance. It features a propagation delay of 290ps, dual outputs for 25Ω drive applications, 75kΩ internal input pulldown resistors, and >1000V ESD protection.

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The MC10EL/100EL12 is a low impedance drive buffer. With two pairs of OR/NOR outputs the device is ideally suited for high drive applications such as memory addressing. The device is a function equivalent to the E112 device with higher performance capabilities. With propagation delays significantly faster than the E112 the EL12 is ideally suited for those applications which require the ultimate in AC performance.

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MC10EL/100EL11 is a differential 1:2 fanout buffer with 265ps propagation delay and 5ps skew between outputs.

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The MC10EL/100EL11 is a differential 1:2 fanout buffer. The device is functionally similar to the E111 device but with higher performance capabilities. Having within-device skews and output transition times significantly improved over the E111, the EL11 is ideally suited for those applications which require the ultimate in AC performance. The differential inputs of the EL11 employ clamping circuitry to maintain stability under open input conditions. If the inputs are left open (pulled to VEE) the Q outputs will go LOW.

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