2.00 by 2.25mm (.079 by

Stacking System

75117

Board-to-Board

Connector System

VHDM® Board-to-Board 8-Row Stacker System Connects

High Speed, High Density for Mezzanine Boards

Molex’s 8-Row VHDM Stacker system allows for 2.5 Gbps data rates with high densities on mezzanine style

board-to-board applications, offering 100 real circuits per inch of connector. The VHDM Stacker system offers

the flexibility of a parallel board connection using the same proven wafer design, separable interface and

press-fit compliant pins as the standard VHDM connector family, with less than 5% crosstalk. VHDM Stackers

are ideal for both single-ended and differential signaling.

Reference Information

Packaging: Tube

UL File No.: E29179

CSA File No.: 152514 (LR19980)

Mates With: 74060

Designed In: Millimeters

Electrical

Voltage: 250V

Current: 1.0A

Contact Resistance: 13.5m

Ω max.

Dielectric Withstanding Voltage: 750VAC

Insulation Resistance: 500VDC

Mechanical

Contact Insertion Force: 45N max. per press-fit pin

Contact Retention to Housing: 9N min. per press-fit pin

Mating Force: 0.40N nominal per pin

Unmating Force: 0.15N min. per pin

Durability: 200 cycles

Physical

Housing: Liquid crystal polymer, UL 94V-0

Contact: Copper Alloy

Plating: Selective Gold 30µ" min. with Tin/Lead on the

tails

Operating Temperature: -55 to +105° C

SPECIFICATIONS

Features and Benefits

■

High speed, high density mezzanine design

enables up to 2.5 Gbps bandwidth per signal pair

■

2.00 by 2.25 mm (0.79 by 0.89”) pitch provides

40 contacts per centimeter

■

Wafer construction permits very accurate location

of ground planes relative to the signal contacts for

improved impedance control

■

Eye-of-the-needle press-fit receptacles and

headers allow tight spacing without solder

bridging between contact tails, repair ability and a

highly reliable termination to the PCB

■

Ground planes between signal columns provide:

- Tightly controlled impedance for rise times down

to 200 picoseconds

-Very low cross talk between signals within a

column

-Extremely low cross talk between signal columns

■

Mates with VHDM open headers permitting

utilization of existing standard backplane headers