SI53019-A02A Datasheet, PDF (1/37 Pages) Silicon Laboratories – 19-OUTPUT PCIE GEN3 AND QPI BUFFER

Si53019-A02A
19-OUTPUT PCIE GEN3 AND QPI BUFFER
Features
 Nineteen 0.7 V current-mode,  PLL or bypass mode
HCSL PCIe Gen3 outputs
 Spread spectrum tolerable
 100 MHz /133 MHz PLL
 50 ps output-to-output skew

operation, supports PCIe and
QPI

PLL bandwidth SW SMBUS

programming overrides the latch
value from HW pin
Fixed 0 ps input to output delay
Low phase jitter (Intel QPI, PCIe
Gen 1/2/3/4 common clock
compliant)
 9 selectable SMBUS addresses ^{ Gen 3 SRNS Compliant}
 Fixed internal feedback path ^{ 100 ps input-to-output delay}
 8 dedicated OE pins
 Extended Temperature:
–40 to 85 °C
 Package: 72-pin QFN
Ordering Information:
See page 32.
Applications
 Server
 Storage
 Data center
Description
The Si53019-A02A is a 19-output, current mode HCSL differential clock
buffer that meets all of the performance requirements of the Intel
DB1900Z specification. The device is optimized for distributing reference
clocks for Intel^® QuickPath Interconnect (Intel QPI), PCIe Gen 1/Gen 2/
Gen 3/Gen 4, SAS, SATA, and Intel Scalable Memory Interconnect (Intel
SMI) applications. The VCO of the device is optimized to support
100 MHz and 133 MHz operation. Each differential output can be enabled
through I²C for maximum flexibility and power savings.
The Si53019-A02A features a fixed internal feedback path. Measuring
PCIe clock jitter is quick and easy with the Silicon Labs PCIe Clock Jitter
Tool. Download it for free at www.silabs.com/pcie-learningcenter.
Pin Assignments
VDDA 1
GNDA 2
IREF 3
100M_133M 4
HBW_BYPASS_LBW 5
PWRGD / PWRDN 6
GND 7
VDDR 8
CLK_IN 9
CLK_IN 10
SA_0 11
SDA 12
SCL 13
SA_1 14
NC 15
NC 16
FB_OUT 17
FB_OUT 18
Si53019-A02A
54 OE11
53 DIF_11
52 DIF_11
51 OE10
50 DIF_10
49 DIF_10
48 OE9
47 DIF_9
46 DIF_9
45 VDD
44 GND
43 OE8
42 DIF_8
41 DIF_8
40 OE7
39 DIF_7
38 DIF_7
37 OE6
Note: FB_OUT pins must be identically terminated to the other DIF outputs.
Patents pending
Rev. 1.1 12/15
Copyright © 2015 by Silicon Laboratories
Si53019-A02A