ASNT_MUX64 64Gbps 2:1 Multiplexer

Transcription

1 ASNT_MUX64 64Gbps 2:1 Multiplexer 105ps data phase shift capability for both data inputs VCO s from 20GHz to 32.1GHz User selectable clock divide by 2 to 512 sync output for scope triggering 17ps Rise/Fall time for sync output GUI software interfaces with onboard USB Reference Clock In GHz 24-32GHz VCO Programmable Divider (1-256) 16 GHz Sync Out 16 GHz 1:2 Splitter ¼ Rate Output clock MHz GHz VCO GHz Divide by 2 32 GHz External Clock In 2:1 Selector 2:1 Selector 1:3 Splitter ½ Rate Output Clock Data Input 1 105ps Adjustable Delay 64Gbps 2:1 Mux Data Out Data Input 2 105ps Adjustable Delay Figure 1. Block Diagram Rev

2 DESCRIPTION The ASNT_MUX64 can be used for test applications, design verification, and R&D environments. An external half-rate clock or a low frequency reference clock to the onboard PLL is needed to drive the 2:1 MUX. The Sync output provides oscilloscope triggering to view the pattern or eye diagram of any data. A Windows GUI (compatible with Windows XP, 7, 8) is used to control all adjustable parameters. Power is supplied with an included AC-DC power supply. The front panel of the instrument is shown in Figure 2. It consists of 1 differential data output with 1.85mm DC coupled female connectors, 2 differential data inputs with 2.92mm AC coupled female connectors, 1 single-ended half-rate clock output with a 2.92mm AC coupled female connector, 1 quarter-rate single-ended clock output with a female SMA AC coupled connector, 1 single-ended half-rate clock input with a female 2.92mm AC coupled connector, and 1 single-ended Sync output with a female SMA AC coupled connector. Figure 2. Front Panel The back panel of the instrument is shown in Figure 3. It contains 1 low reference clock input with a female SMA connector, the power ON/OFF switch which turns the instrument on and off, the -5V DC power supply (included) which connects to the male barrel jack shown, and the USB-B connector that allows connection to a computer for controlling the instrument through a Windows GUI. Figure 3. Back Panel Rev

3 Figure 4. Data Output 60Gbps PRBS7 Data Inputs Data Input 1, as well as Data Input 2, both have controllable 105ps of delay before entering the 2:1 MUX. Clock I/O s There are 2 single-ended AC coupled clock inputs: Reference Clock In is a low frequency reference clock input that needs at least 100mV of input amplitude to drive the onboard PLL s. The reference frequency range can be found in Table 1. External Clock In is a half-rate clock input that may alternatively be used instead of the Reference Clock In input to provide any data rate from 1Mbps to 64Gbps. This is achieved by providing at least 100mV of input amplitude from 0.5MHz to 32GHz. Rev

4 There are 2 AC coupled clock outputs: Half-rate Clock Out is a single-ended output from 0.5MHz to 32GHz with typical output amplitude of 0.4V peak to peak. Quarter-rate Clock Out is a single-ended output from 0.25MHz to 16GHz with typical output amplitude of 0.5V peak to peak. Sync Output Sync Out provides a selectable clock divided by 2*n where the n integer values range from 1 to 256. This output delivers AC coupled single-ended amplitude of 600mV. Sync Out can be connected to an oscilloscope s trigger to allow display of a pattern or eye diagram of any data. Note: All I/O s are AC coupled except Data Output INPUT OUTPUT MODE Reference Clock In External Clock In 1/2 Rate Clock Out 1/4 Rate Clock Out Data Output (Gbps) Min Max Min Max Min Max Min Max Min Max VCO VCO VCO VCO VCO Ext 5E Clock 04 Table 1. Clock/Data Table Rev

5 ELECTRICAL CHARACTERISTICS PARAMETER MIN TYP MAX UNIT COMMENTS Reference Clock In Single-ended Swing mvpp Frequency MHz See Table 1. External Clock In Single-ended Swing mvpp Frequency GHz Data Input 1 / Data Input 2 Differential Swing mvpp Frequency Gbps Delay Adjustment range 105 ps ½ Rate Clock Out Differential or Single-ended Single-ended Swing 400 mvpp Typical Frequency GHz ¼ Rate Clock Out Single-ended Swing 500 mvpp Typical Frequency GHz Data Out Differential Swing 2000 mvpp Common Mode Level -0.5 V Data Rate Gbps Rise/Fall times 7/7 ps 20% - 80% Duty Cycle % Adjustable Sync Out Frequency GHz Single-ended Swing 600 mvpp Duty Cycle % Rise/Fall time ps 20%-80% All I/O's are AC coupled except Data Output Rev

6 MECHANICAL DIMENSIONS PARAMETER TYP UNIT COMMENTS Length 164 mm Width 129 mm Height 58 mm REVISION HISTORY Revision Date Changes Corrected Figure Initial Release Rev