CDCDB2000 DB2000QL compliant 20-output clock buffer for PCIe Gen 1 to Gen 5 | TI.com

CDCDB2000
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DB2000QL compliant 20-output clock buffer for PCIe Gen 1 to Gen 5

 

Description

The CDCDB2000 is a 20-output LP-HCSL, DB2000QL compliant, clock buffer capable of distributing the reference clock for PCIe Gen 1-5, QuickPath Interconnect (QPI), UPI, SAS, and SATA interfaces. The SMBus, SBI, and 8 output enable pins allow the configuration and control of all 20 outputs individually. The CDCDB2000 is a DB2000QL derivative buffer and meets or exceeds the system parameters in the DB2000QL specification. The CDCDB2000 is packaged in a 6-mm × 6-mm TLGA/GQFN package with 80 leads.

Features

  • 20 LP-HCSL outputs with integrated 85-Ω output terminations
  • 8 hardware output enable (OE#) controls
  • Additive phase jitter after DB2000QL filter:
    < 0.08ps rms
  • Supports PCIe Gen 4 and Gen 5 Common Clock (CC) and Individual Reference (IR) architectures
    • Spread spectrum-compatible
  • Cycle-to-cycle jitter: < 50 ps
  • Output-to-output skew: < 50 ps
  • Input-to-output delay: < 3 ns
  • 3.3-V core and IO supply voltages
  • Hardware-controlled low power mode (PD#)
  • Side-Band Interface (SBI) for output control in PD# mode
  • 9 selectable SMBus addresses
  • Power consumption: < 600 mW
  • 6-mm × 6-mm, 80-pin TLGA/GQFN package

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Parametrics

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Part number Order Function Additive RMS jitter (Typ) (fs) Output frequency (Max) (MHz) Number of outputs VCC out (V) VCC core (V) Features Operating temperature range (C) Rating Output type Package Group Package size: mm2:W x L (PKG) Input type
CDCDB2000 Order now Differential     80     250     20     3.3     3.3       -40 to 85     Catalog     LP-HCSL     TLGA | 80     80TLGA: 36 mm2: 6 x 6 (TLGA | 80)     LP-HCSL    
CDCUN1208LP Order now Differential
Fanout    
200     400     8     1.8
2.5
3.3    
1.8
2.5
3.3    
3.3-V VCC/VDD
I2C interface
Pin programmable    
-40 to 85     Catalog     HCSL     VQFN | 32     32VQFN: 25 mm2: 5 x 5 (VQFN | 32)     HCSL    
CDCV304 Order now Single-ended     56     200     4     2.5
3.3    
2.5
3.3    
  -40 to 85     Catalog     LVTTL     TSSOP | 8     8TSSOP: 19 mm2: 6.4 x 3 (TSSOP | 8)     LVTTL    
LMK00334 Order now Differential
Fanout    
30     400     4     2.5
3.3    
3.3     PCIe Gen 4 Compliant     -40 to 85     Catalog     HCSL
LVCMOS    
WQFN | 32     32WQFN: 25 mm2: 5 x 5 (WQFN | 32)     CML
HCSL
HSTL
LVCMOS
LVDS
LVPECL
SSTL
XTAL    
LMK00338 Order now Differential
Fanout    
30     400     8     2.5
3.3    
3.3     PCIe 3.0 Compliant     -40 to 85     Catalog     HCSL
LVCMOS    
WQFN | 40     40WQFN: 36 mm2: 6 x 6 (WQFN | 40)     CML
HCSL
HSTL
LVCMOS
LVDS
LVPECL
LVTTL
SSTL
XTAL