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GS1531-CBE2 Datasheet(PDF) 6 Page - Gennum Corporation |
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GS1531-CBE2 Datasheet(HTML) 6 Page - Gennum Corporation |
6 / 49 page GS1531 Data Sheet 30573 - 4 July 2005 6 of 49 1.2 Pin Descriptions Table 1-1: Pin Descriptions Pin Number Name Timing Type Description A1 LF Analog Output Control voltage to external voltage controlled oscillator. Nominally +1.25V DC. A2 VCO_VCC – Output Power Power supply for the external voltage controlled oscillator. Connect to pin 7 of the GO1525. This pin is an output. Should be isolated from all other power supplies. A3 VCO_GND – Output Power Ground reference for the external voltage controlled oscillator. Connect to pins 2, 4, 6, and 8 of the GO1525. This pin is an output. Should be isolated from all other grounds. A4, A5 VCO, VCO Analog Input Differential inputs for the external VCO reference signal. For single ended devices such as the GO1525, VCO should be AC coupled to VCO_GND. VCO is nominally 1.485GHz. A6, B5, B6, C1, C4, C5, C6, C7, C8, D1, D2, D3, D4, D7, D8, E1, E2, E3, E7, F2, F3, F7, G1, G2, G3, G7, H1, H2, H3, H7, J1, J2, J3, J4 NC – – No connect. A7 PCLK – Input PARALLEL DATA BUS CLOCK Signal levels are LVCMOS/LVTTL compatible. HD 20-bit mode PCLK = 74.25MHz or 74.25/1.001MHz HD 10-bit mode PCLK = 148.5MHz or 148.5/1.001MHz SD 20-bit mode PCLK = 13.5MHz SD 10-bit mode PCLK = 27MHz A8, E8, K8 IO_VDD – Power Power supply connection for digital I/O buffers. Connect to +3.3V DC digital. |
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