2:1 1.5V PCIe Gen1-2-3 Clock Mux 9DMU0141 w/Zo=100ohms DATASHEET General Description Features/Benefits The 9DMU0141 is a member of IDT s SOC-Friendly 1.5V LP-HCSL output w/integrated terminations saves 4 Ultra-Low-Power (ULP) PCIe Gen1-2-3 family. It has resistors compared to standard HCSL output integrated output terminations providing Zo=100ohms for 1.5V operation 11mW typical power consumption direct connection to 100ohm transmission lines. The output Selectable asynchronous or glitch-free switching allows has an OE pin for optimal system control and power the mux to be selected at power up even if both inputs are management. The part provides asynchronous or glitch-free not running, then transition to glitch-free switching mode switching modes. Spread Spectrum Compatible supports EMI reduction OE pins support DIF power management Recommended Application HCSL differential inputs can be driven by common clock 2:1 1.5V PCIe Gen1-2-3 Clock Mux sources 1MHz to 167MHz operating frequency Space saving 16-pin 3x3mm VFQFPN minimal board Output Features space 1 Low-Power (LP) HCSL DIF pair w/Zo=100 Key Specifications DIF additive cycle-to-cycle jitter <5ps DIF phase jitter is PCIe Gen1-2-3 compliant 125MHz additive phase jitter 535fs rms typical (12kHz to 20MHz) Block Diagram OE0 DIF INA A DIF0 DIF INB B vSW MODE SEL A B 9DMU0141 REVISION A 09/30/14 1 2014 Integrated Device Technology, Inc.9DMU0141 DATASHEET Pin Configuration 16 15 14 13 GNDR 1 VDD1.5 12 VDDR1.5 2 GND 11 9DMU0141 VDDR1.5 3 DIF0 10 GNDR 4 9 DIF0 5678 16-pin VFQFPN, 3x3 mm, 0.5mm pitch prefix indicates internal 120KOhm pull up resistor v prefix indicates internal 120KOhm pull down resistor Note: Paddle may be connected to ground for thermal purposes. It is not required electrically. Power Management Table Power Connections Pin Number DIFx OEx Pin DIF IN Description True O/P Comp. O/P VDD GND 21 Input A receiver analog 0 Running Running Running 34 Input B receiver analog 1 Running Low Low 12 11 DIF outputs Note: Pins 2 and 3 should be decoupled separately to pins 1 and 4 respectively. Pin Descriptions Pin Pin Name Type Pin Description 1 GNDR GND Analog Ground pin for the differential input (receiver) 1.5V power for differential input clock (receiver). This VDD should be treated as an Analog 2 VDDR1.5 PWR power rail and filtered appropriately. 1.5V power for differential input clock (receiver). This VDD should be treated as an Analog 3 VDDR1.5 PWR power rail and filtered appropriately. 4 GNDR GND Analog Ground pin for the differential input (receiver) 5 DIF INB IN HCSL Differential True input 6 DIF INB IN HCSL Differential Complement Input Switch Mode. This pin selects either asynchronous or glitch-free switching of the mux. Use asynchronous mode if 0 or 1 of the input clocks is running. Use glitch-free mode if both input 7vSW MODE IN clocks are running. This pin has an internal pull down resistor of ~120kohms. 0 = asynchronous mode 1 = glitch-free mode Active low input for enabling DIF pair 0. This pin has an internal pull-up resistor. 8 OE0 IN 1 =disable outputs, 0 = enable outputs 9 DIF0 OUT Differential true clock output 10 DIF0 OUT Differential Complementary clock output 11 GND GND Ground pin. 12 VDD1.5 PWR Power supply, nominally 1.5V 13 NC N/A No Connection. Input to select differential input clock A or differential input clock B. This input has an internal 14 SEL A B IN pull-up resistor. 0 = Input B selected, 1 = Input A selected. 15 DIF INA IN HCSL Differential True input 16 DIF INA IN HCSL Differential Complement Input 2:1 1.5V PCIE GEN1-2-3 CLOCK MUX W/ZO=100OHMS 2 REVISION A 09/30/14 DIF INB DIF INA DIF INB DIF INA vSW MODE SEL A B OE0 NC