MAX9158 Datasheet, PDF (1/15 Pages) Maxim Integrated Products – Quad Bus LVDS Transceiver in 44 QFN

19-2396; Rev 0; 4/02
Quad Bus LVDS Transceiver in 44 QFN
General Description
The MAX9158 is a quad bus LVDS (BLVDS) transceiver
for heavily loaded, half-duplex multipoint buses. A 44-
lead QFN package and flow-through pinout allow the
transceiver to be placed near the connector. The
MAX9158 drives LVDS levels into a 27Ω load (double
terminated, heavily loaded LVDS bus) at up to
200Mbps. An input fail-safe circuit ensures the receiver
output is high when the differential inputs are open, or
undriven and shorted, or undriven and terminated. The
MAX9158 operates from a single 3.3V supply, consum-
ing 77mA supply current with drivers enabled, and
19.9mA with drivers disabled.
The MAX9158’s high-impedance I/Os (except for receiver
outputs) when V_CC = 0V or open, combined with glitch-
free power-up and power-down, allow hot swapping of
cards in multicard bus systems; 7.3pF (max) BLVDS I/O
capacitance minimizes bus loading.
The MAX9158 is offered in a 7mm ✕ 7mm 44-lead QFN
package, and is fully specified for the -40°C to +85°C
extended temperature range. Refer to the MAX9157 data
sheet for a quad BLVDS transceiver with hysteresis in 32-
lead QFN and TQFP packages. Refer to the MAX9129
data sheet for a quad BLVDS driver, ideal for dual multi-
point full-duplex buses.
Applications
Add/Drop Muxes
Digital Cross-Connects
Network
Switches/Routers
Cellular Phone Base
Stations
DSLAMs
Multipoint Buses
Features
o 44-Lead QFN Package
o 1ns (min) Driver Transition Time (0% to 100%)
Minimizes Reflections
o Guaranteed 7.3pF (max) Bus Load Capacitance
o Glitch-Free Power-Up and Power-Down
o Hot-Swappable, High-Impedance I/O with V_CC =
0V or Open
o Guaranteed 200Mbps Driver Data Rate
o Low-Jitter Fail-Safe Circuit
o Flow-Through Pinout
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX9158EGM -40°C to +85°C 44 QFN (7mm ✕ 7mm)
Pin Configuration
TOP VIEW
(LEADS UNDER PACKAGE)
N.C. 1
N.C. 2
VCC 3
GND 4
RE34 5
VCC 6
AVCC 7
DE34 8
AGND 9
AVCC 10
N.C. 11
N.C. 12
MAX9158EGM
34 N.C.
33 N.C.
32 N.C.
31 GND
30 VCC
29 RE12
28 GND
27 AVCC
26 DE12
25 AGND
24 N.C.
23 N.C.
Functional Diagram appears at end of data sheet.
MAX9158
CARD 1
MAX9158
CARD 15
QFN
Typical Operating Circuit
MAX9158
CARD 16
1in CARD
SPACING
Rt = 54Ω
Rt = 54Ω
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