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CDC925DL Datasheet(PDF) 3 Page - Texas Instruments |
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CDC925DL Datasheet(HTML) 3 Page - Texas Instruments |
3 / 18 page CDC925 133-MHz CLOCK SYNTHESIZER/DRIVER FOR PC MOTHERBOARDS WITH 3-STATE OUTPUTS SCAS633 – JULY 28, 1999 3 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 Terminal Functions TERMINAL I/O DESCRIPTION NAME NO. I/O DESCRIPTION 3V66 [0–3] 21, 22, 25, 26 O 3.3 V, Type 5, 66-MHz clock outputs 48MHz 30 O 3.3 V, Type 3, 48-MHz clock output APIC [0–2] 53, 54, 55 O 2.5 V, Type 1, APIC clock outputs CPU [0–3] 41, 42, 45, 46 O 2.5 V, Type 1, CPU clock outputs CPU_DIV2 [0–1] 49, 50 O 2.5 V, Type 1, CPU_DIV2 clock outputs CPU_STOP 36 I Disables CPU clock to low state GND 1, 7, 13, 19, 20, 24, 29, 38, 40, 44, 48, 52 Ground PCI [1–7] 9, 11, 12, 14, 15, 17, 18 O 3.3 V, Type 5, 33-MHz PCI clock outputs PCI_F 8 O Free-running 3.3-V, Type 5, 33-MHz PCI clock output PCI_STOP 37 I Disables PCI clock to low state PWR_DWN 35 I Power down for complete device with outputs forced low REF0, REF1 2, 3 O 3.3 V, Type 3, 14.318-MHz reference clock output SEL0, SEL1 32, 33 I LVTTL level logic select terminals for function selection SEL133/100 28 I LVTTL level logic select pins for enabling 100/133 MHz SPREAD 34 I Disables SSC function VDD3.3V 4, 10, 16, 23, 27, 31, 39 Power for the 3V66, 48MHz, PCI, REF outputs and CORE logic VDD2.5V 43, 47, 51, 56 Power for CPU and APIC outputs XIN 5 I Crystal input – 14.318 MHz XOUT 6 O Crystal output – 14.318 MHz |
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