HDMP-1638 Datasheet, PDF (11/19 Pages) Agilent(Hewlett-Packard) – Gigabit Ethernet Transceiver Chip with Dual Serial I/O and Differential PECL Clock Inputs

11
HDMP-1638 (TRx)
Thermal and Power Temperature Characteristics
T_A = 0 °C to +70 °C, V_CC = 3.15 V to 3.45 V
Symbol
Parameter
Units Typ. Max.
P_{D, TRx[1,2]}
Transceiver Power Dissipation, one Output Pair Open,
Parallel Data Has 5 Ones and 5 Zeroes.
mW 840 TBD
P_{D, 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.
C_INPUT Input Capacitance on TTL Input Pins pF 1.6