HDMP-1638 查看數據表（PDF） - HP => Agilent Technologies

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HDMP-1638

Gigabit Ethernet Transceiver Chip with Dual Serial I/O and Differential PECL Clock Inputs

HP => Agilent Technologies 

11

HDMP-1638 (TRx)

Thermal and Power Temperature Characteristics

TA = 0 °C to +70 °C, VCC = 3.15 V to 3.45 V

Symbol

Parameter

Units Typ. Max.

PD, TRx[1,2]

Transceiver Power Dissipation, one Output Pair Open,

Parallel Data Has 5 Ones and 5 Zeroes.

mW 840 TBD

PD, TRx[1,2,3] Transceiver Power Dissipation, Outputs Connected Per

Recommended Bias Terminations with Idle Pattern

mW 890 TBD

⌰jc[4]

Thermal Resistance, Junction to Case

°C/W 10

Notes:

1. PD is obtained by multiplying VCC by ICC and subtracting the power dissipated outside the chip at the high speed bias resistors.

2. Typical specified with VCC = 3.3 volts, maximum value specified with VCC = 3.45 volts.

3. Specified with high speed outputs biased with 150 Ω resistors and receiver TTL outputs driving 10 pF loads.

4. Based on independent package testing by Agilent Technologies. ⌰ja for these devices is 48°C/W for the HDMP-1638. ⌰ja is

measured on a standard 3x3” FR4 PCB in a still air environment. To determine the actual junction temperature in a given

application, use the following: TJ = TC+(⌰jc x Pd), where TC is the case temperature measured on the top center of the package

and PD is the power being dissipated.

I/O Type Definitions

I/O Type

Definition

I-TTL

Input TTL, floats high when left open

O-TTL

Output TTL

HS_OUT High Speed Output, ECL Compatible

HS_IN

High Speed Input

C

External circuit node

S

Power supply or ground

PECL

Positive ECL

HDMP-1638 (TRx) Pin Input Capacitance

Symbol Parameter

Units Typ. Max.

CINPUT Input Capacitance on TTL Input Pins pF 1.6

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