MAX3891ECB+D Maxim Integrated, MAX3891ECB+D Datasheet - Page 7

• Manufacturer Part Number: MAX3891ECB+D
• Description: Serializers & Deserializers - Serdes Integrated Circuits (ICs)
• Manufacturer: Maxim Integrated
• Type: Serializerr

Specifications of MAX3891ECB+D

• Rohs: yes
• Data Rate: 2.5 Gbit/s
• Input Type: LVPECL
• Output Type: LVPECL
• Number Of Inputs: 16
• Number Of Outputs: 1
• Operating Supply Voltage: 3 V to 3.6 V
• Operating Temperature Range: - 40 C to + 85 C
• Package / Case: TQFP-64 EP
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Factory Pack Quantity: 160
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 3 V

The adjusted setup (t
requirements become
It is important to bias the MAX3891’s PECL data and
clock IOs appropriately. Figures 3 and 4 show alterna-
tive PECL output termination methods. A circuit that
provides 50Ω to (V
tion with controlled impedance transmission lines for
proper termination. Use Thevenin equivalent termina-
tion when a (V
coupling is necessary, make sure that the coupling
capacitor follows the 50Ω or Thevenin equivalent DC
termination. To ensure best performance, the differen-
tial outputs (SDO± and PCLKO±) must have balanced
loads.
The system loopback outputs (SLBO) of the MAX3891
are CML compatible. The configuration of the MAX3891
current-mode logic (CML) output circuit includes inter-
nal 50Ω back termination to V
outputs are intended to drive a terminated 50Ω trans-
mission line.
PECL Input and Output Terminations
t
SUADJ
16:1 Serializer,3.3V, 2.5Gbps, SDH/SONET,
CC
(or t
with Clock Synthesis and LVPECL Inputs
_______________________________________________________________________________________
- 2V) supply is not available. If AC-
CC
Current-Mode Logic Outputs
HADJ
- 2V) should be used in conjunc-
SUADJ
) = t
SU
) and hold-time (t
(or t
CC
(Figure 5). These
H
) + t
DEG
HADJ
)
For best performance, use good high-frequency layout
techniques. Filter voltage supplies and keep ground
connections short. Use multiple vias where possible.
Use controlled impedance transmission lines to inter-
face with the MAX3891 clock and data inputs and out-
puts.
The 64-pin exposed pad (EP) TQFP incorporates fea-
tures that provide a very low thermal-resistance path for
heat removal. The MAX3891 EP must be soldered
directly to a ground plane with good thermal conduc-
tance.
TRANSISTOR COUNT: 1712
PROCESS: Bipolar
Exposed Pad Package
Chip Information
Layout Techniques
7