HDMP-1685A Datasheet, PDF(17/21 Page) Agilent(Hewlett-Packard) – 1.25 Gbps Four Channel SerDes with 5-pin DDR SSTL-2 Parallel Interface

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HDMP-1685A Datasheet, PDF (17/21 Pages) Agilent(Hewlett-Packard) – 1.25 Gbps Four Channel SerDes with 5-pin DDR SSTL-2 Parallel Interface

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HDMP-1685A TRx I/O Definition, continued

Name Pin Type

Signal

VCC

A02 S

A10

C14

G04

J14

K16

L04

N15

R04

R14

R16

T03

T04

T14

U05

Power Supply: Normally 3.3 volts. Used for logic, SSTL inputs, and LVTTL I/O.

VCCA T09 S

Analog Power Supply: Normally 3.3 volts. Used to provide a clean supply line for the

PLLs and high-speed analog cells.

VCR0 C04 S

D03

F03

VCR1 A09

B07

C05

VCR2 A13

A16

C11

VCR3 C15

E14

G17

Rx SSTL2 Output Power Supply: Normally 3.3 volts. Used for all SSTL2 receiver

output buffer cells.

VCP0 T05 S

VCP1 T07

VCP2 T11

VCP3 T13

High-Speed Output Supply: Normally 3.3 volts. Used only for the last stage

of the high-speed transmitter output cells (HS_OUT) as shown in Figure 10.

Due to high current transitions, this VCC should be well bypassed to a ground plane.

GNDA R08 S

Analog Ground: Normally 0 volts. All GND pads on the chip are connected to one

ground slug in the package, which then distributes these to GND balls.

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