
General Description
The MAX9176/MAX9177 are 670MHz, low-jitter, low-
skew 2:1 multiplexers ideal for protection switching,
loopback, and clock distribution. The devices feature
ultra-low 68ps peak-to-peak deterministic jitter that
ensures reliable operation in high-speed links that are
highly sensitive to timing errors.
The MAX9176 has fail-safe LVDS inputs and an LVDS
output. The MAX9177 has “anything” differential inputs
(CML/LVDS/LVPECL) and an LVDS output. The output
can be put into high impedance using the power-down
input. The MAX9176 features fail-safe circuits that drive
the output high when a selected input is open, undriven
and shorted, or undriven and terminated. The MAX9177
has bias circuits that force the output high when a
selected input is open. The mux select and power-
down inputs are compatible with standard LVTTL/
LVCMOS logic.
The select and power-down inputs tolerate undershoot
of -1V and overshoot of VCC + 1V. The MAX9176/
MAX9177 are available in 10-pin MAX and 10-lead
thin QFN packages, and operate from a single 3.3V
supply over the -40°C to +85°C temperature range.
Applications
Protection Switching
Loopback
Clock Distribution
Features
o 1.0ps(RMS) Jitter (max) at 670MHz
o 68ps(P-P) Jitter at 800Mbps Data Rate
o 3.3V Supply
o LVDS Fail-Safe Inputs (MAX9176)
o Anything Inputs (MAX9177) Accept
CML/LVDS/LVPECL
o Select and Power-Down Inputs Tolerate -1.0V
and VCC + 1.0V
o Low-Power CMOS Design
o 10-Lead MAX and QFN Packages
o -40°C to +85°C Operating Temperature Range
o Conform to ANSI TIA/EIA-644 LVDS Standard
o IEC61000-4-2 Level 4 ESD Rating
MAX9176/MAX9177
670MHz LVDS-to-LVDS and
Anything-to-LVDS 2:1 Multiplexers
________________________________________________________________ Maxim Integrated Products
1
1
2
3
4
5
10
9
8
7
6
OUT+
OUT-
VCC
PD
IN1+
GND
INO-
IN0+
MAX9176
MAX
TOP VIEW
SEL
IN1-
1
2
3
4
5
10
9
8
7
6
OUT+
OUT-
VCC
PD
IN1+
GND
INO-
EXPOSED
PAD
IN0+
QFN
(LEADS UNDER PACKAGE)
SEL
IN1-
PART
TEMP RANGE
PIN-PACKAGE
MAX9176EUB
-40
°C to +85°C
10 MAX
MAX9176ETB*
-40
°C to +85°C
10 Thin QFN-EP**
MAX9177EUB
-40
°C to +85°C
10 MAX
MAX9177ETB*
-40
°C to +85°C
10 Thin QFN-EP**
Pin Configurations
Ordering Information
19-2757; Rev 0; 1/03
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Functional Diagram appears at end of data sheet.
*Future product—contact factory for availability.
**EP = Exposed paddle.