SM8761 Nippon_Precision_Circuits America, SM8761 Datasheet
SM8761
Related parts for SM8761
SM8761 Summary of contents
Page 1
... OVERVIEW The SM8761 series are compact clock generator ICs that have a spread spectrum (SS) function to reduce unde- sirable EMI radiation. They have a built-in crystal oscillator circuit, PLL, and loop filter. They accept an input clock signal, generated using an external crystal or direct external clock input, and output an SS-modulated clock signal ...
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... CLKOUT O 5 TSTN Ip 6 MSEL0 I 7 MSEL1 I 8 XTN O *1. Built-in pull-up resistor SM8761 series VDD VSS Phase Detector LPF & Charge Pump N Counter VCO Mode, R/N Counter setting, SS Control Divider setting, etc. SS Control Control Logic MSEL0 Function Crystal oscillator element connection or external clock input ...
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... SM8761AB unless otherwise noted. SS Parameter Symbol Supply voltage range V DD Output load capacitance C L Master clock frequency f IN Operating temperature range T OPR SM8761 series Rating Unit − 0.3 to +6.5 V − − 300 mW − +125 ° C Condition min +3 ...
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... IL1 I IH2 Input current TSTN I IL2 I IH3 XT I IL3 V OH Output voltage CLKOUT V OL SM8761 series Condition min V = 3.3V 25°C, DD external input clock, fin = 33MHz, – all outputs unloaded V = 3.3V 25°C, DD external input clock, fin = 75MHz, – all outputs unloaded 0.85V V = 3.3V ...
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... IL1 I IH2 Input current TSTN I IL2 I IH3 XT I IL3 V OH Output voltage CLKOUT V OL SM8761 series Condition min V = 3.3V 25°C, DD external input clock, fin = 12MHz, – all outputs unloaded V = 3.3V 25°C, DD external input clock, fin = 24MHz, – all outputs unloaded 0.85V V = 3.3V ...
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... Measured using the circuit in Figure 1 on the NPC standard evaluation board. *3. The power-up time is the time from when the supply reaches 3.0V after the supply is turned ON until each output clock reaches its designated fre- quency to within ± 0.1%. + DUT DUT: Device Under Testing SM8761 series Pins Condition Crystal connection XT *1 ...
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... FUNCTIONAL DESCRIPTION Master Clock The SM8761 series master clock can be generated by the crystal oscillator formed by connecting a crystal between XT (pin 1) and XTN (pin 8) as shown in Figure 2. Alternatively, an external master clock can be input directly on XT (pin 1) as shown in Figure external clock is input on XT recommended that the clock have 50% duty and V level voltage amplitude ...
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... The modulation rates in the table above are reference values at 12MHz (Low range) and 24MHz (High range). The modula- tion rate varies with the input/output frequency. *2. If MSEL1 (pin 7) and MSEL0 (pin 6) are both simultaneously "M" level, then SM8761AB operation cannot be guaranteed. Note. Signal level “H” represents V level, “ ...
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... VSS Application Load VSS Note. This is a sample connection diagram only, and its use is not a guarantee of SM8761 series device characteristics. MSEL1 and MSEL0 Connection Method MSEL1 and MSEL0 both support a 1/2V Typical connection circuits for each input level shown in figure 5. "H" level is input by connection to VDD, and " ...
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... MSEL1 = "L"/ MSEL0 = “H”: down spread –2.8%, fin = 33.2MHz Note. The output spectrum sample in figure (a) is for NPC test mode with the SS function OFF. Note. These spectrum diagrams were obtained using the NPC evaluation board. These spectrum diagrams are not guaranteed SM8761 series device characteristics. ...
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... Customers are requested not to export or re-export, directly or indirectly, the Products to any country or any entity not in compliance with or in violation of the national export administration laws, treaties, orders and regulations. Customers are requested appropriately take steps to obtain required permissions or approvals from appropriate government agencies. SM8761 series NIPPON PRECISION CIRCUITS INC. 4-3, Fukuzumi 2-chome, Koto-ku, ...