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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 V

+ 1V. The MAX9176/

MAX9177 are available in 10-pin µMAX 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

♦ 1.0ps

(RMS)

Jitter (max) at 670MHz

♦ 68ps

(P-P)

Jitter at 800Mbps Data Rate

♦ 3.3V Supply

♦ LVDS Fail-Safe Inputs (MAX9176)

♦ Anything Inputs (MAX9177) Accept

CML/LVDS/LVPECL

♦ Select and Power-Down Inputs Tolerate -1.0V

and V

+ 1.0V

♦ Low-Power CMOS Design

♦ 10-Lead µMAX and QFN Packages

♦ -40°C to +85°C Operating Temperature Range

♦ Conform to ANSI TIA/EIA-644 LVDS Standard

♦ IEC61000-4-2 Level 4 ESD Rating

MAX9176/MAX9177

670MHz LVDS-to-LVDS and

Anything-to-LVDS 2:1 Multiplexers

________________________________________________________________ Maxim Integrated Products 1

OUT+

OUT-

PDIN1+

GND

INO-

IN0+

MAX9176

µMAX

TOP VIEW

SELIN1-

OUT+

OUT-

PDIN1+

GND

INO-

EXPOSED

PAD

IN0+

QFN

(LEADS UNDER PACKAGE)

SELIN1-

PART TEMP RANGE PIN-PACKAGE

MAX9176EUB -40°C to +85°C 10 µMAX

MAX9176ETB* -40°C to +85°C 10 Thin QFN-EP**

MAX9177EUB -40°C to +85°C 10 µMAX

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.

Summary of content (14 pages)

PAGE 1
9-2757; Rev 0; 1/03 670MHz LVDS-to-LVDS and Anything-to-LVDS 2:1 Multiplexers Features ♦ 1.0ps(RMS) Jitter (max) at 670MHz 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.
PAGE 2
MAX9176/MAX9177 670MHz LVDS-to-LVDS and Anything-to-LVDS 2:1 Multiplexers ABSOLUTE MAXIMUM RATINGS VCC to GND ...........................................................-0.3V to +4.0V IN_+, IN_- to GND .................................................-0.3V to +4.0V OUT+, OUT- to GND .............................................-0.3V to +4.0V PD, SEL to GND .........................................-1.4V to (VCC + 1.4V) Single-Ended and Differential Output Short-Circuit Duration (OUT+, OUT-) ................
PAGE 3
670MHz LVDS-to-LVDS and Anything-to-LVDS 2:1 Multiplexers (VCC = 3.0V to 3.6V, RL = 100Ω, PD = high, SEL = high or low, differential input voltage |VID| = 0.05V to 1.2V, MAX9176 input common-mode voltage VCM = |VID/2| to 2.4V - |VID/2|, MAX9177 input common-mode voltage VCM = |VID/2| to VCC - |VID/2|, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = 3.3V, |VID| = 0.2V, VCM = 1.25V, TA = +25°C.
PAGE 4
MAX9176/MAX9177 670MHz LVDS-to-LVDS and Anything-to-LVDS 2:1 Multiplexers AC ELECTRICAL CHARACTERISTICS (VCC = 3.0V to 3.6V, RL = 100Ω, CL = 5pF, differential input voltage |VID| = 0.15V to 1.2V, MAX9176 input common-mode voltage VCM = |VID/2| to 2.4V - |VID/2|, MAX9177 input common-mode voltage VCM = |VID/2| to VCC - |VID/2|, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = 3.3V, |VID| = 0.2V, VCM = 1.25V, TA = +25°C.
PAGE 5
670MHz LVDS-to-LVDS and Anything-to-LVDS 2:1 Multiplexers MAX9176/MAX9177 VCC VCC RIN2 RIN3 COMPARATOR IN_+ IN_+ RIN1 VCC TO MUX TO MUX 0.3V IN_RIN1 RIN3 LVDS RCVR IN_- MAX9177 INPUT MAX9176 FAIL-SAFE INPUT Figure 1. Input Structure 1.25V 1.20V 1.25V 1.20V VOD IN_- OUT- VTEST = 0 TO VCC RL PULSE GENERATOR 5kΩ OUT+ IN_+ 5kΩ OUT+ IN_+ IN_- VTEST = 0 TO VCC RL OUT- 5kΩ 50Ω 5kΩ 50Ω CL CL Figure 4. Transition Time and Propagation Delay Test Circuit Figure 2.
PAGE 6
MAX9176/MAX9177 670MHz LVDS-to-LVDS and Anything-to-LVDS 2:1 Multiplexers IN0- VCC VID = -0.2V INO+ IN1+ 1.25V VID = +0.2V 1.20V IN_+ VCC + 1.0V 1.25V IN_- VCC 1.20V IN1- 5pF 50Ω MAX9176 MAX9177 0.5 VCC 0.5 VCC OUT+ OUT+ 50Ω 0 SEL -1.0V tPSO tPSO PD GENERATOR OUT5pF 50Ω OUT- GND OUT+ Figure 7. Power-Up/Down Delay Test Circuit Figure 6. Select-to-Out Delay Timing 1.0V + VCC VCC 0.5VCC PD 0V -1.0V tPU tPD VOH 50% 50% OUT+ WHEN VID = +50mV OUT- WHEN VID = -50mV 1.
PAGE 7
670MHz LVDS-to-LVDS and Anything-to-LVDS 2:1 Multiplexers 30 25 500 400 300 MAX9176 toc03 600 400 RISE/FALL TIME (ps) 35 450 MAX9176 toc02 40 700 DIFFERENTIAL OUTPUT VOLTAGE (mV) MAX9176 toc01 45 tR 350 300 tF 200 250 100 fIN = 155MHz fIN = 155MHz -40 -15 10 35 60 -40 100 200 300 400 500 600 700 800 -15 10 35 TEMPERATURE (°C) DIFFERENTIAL PROPAGATION DELAY vs. TEMPERATURE SUPPLY CURRENT vs. FREQUENCY SUPPLY CURRENT vs. DATA RATE 2.50 tPLH 2.25 tPHL 2.
PAGE 8
Typical Operating Characteristics (continued) ((MAX9176) VCC = 3.3V, |VID| = 0.2V, VCM = 1.25V, RL = 100Ω, CL = 5pf, PD = VCC, SEL = 0V, IN1+, IN1- = open, TA = +25°C, unless otherwise noted.) DIFFERENTIAL PROPAGATION DELAY vs. COMMON-MODE VOLTAGE DC DIFFERENTIAL OUTPUT VOLTAGE vs. LOAD RESISTOR 400 300 200 MAX9176 toc11 500 3.00 DIFFERENTIAL PROPAGATION DELAY (ns) MAX9176 toc10 600 DC DIFFERENTIAL OUTPUT VOLTAGE (mV) MAX9176/MAX9177 670MHz LVDS-to-LVDS and Anything-to-LVDS 2:1 Multiplexers 2.
PAGE 9
670MHz LVDS-to-LVDS and Anything-to-LVDS 2:1 Multiplexers INPUTS OUTPUT (IN_+) - (IN_-) (OUT+) - (OUT-) ≥ +50mV ≤ -50mV -50mV < VID < +50mV MAX9177 Open MAX9176 Open, undriven short, or undriven parallel termination Table 2.
PAGE 10
MAX9176/MAX9177 670MHz LVDS-to-LVDS and Anything-to-LVDS 2:1 Multiplexers Applications Information Power-Supply Bypassing Bypass the VCC pin with high-frequency surface-mount ceramic 0.1µF and 0.001µF capacitors in parallel as close to the device as possible, with the smaller valued capacitor closest to VCC. Differential Traces Input and output trace characteristics affect the performance of the MAX9176/MAX9177. Use controlledimpedance differential traces (100Ω typical).
PAGE 11
670MHz LVDS-to-LVDS and Anything-to-LVDS 2:1 Multiplexers MAX9176/MAX9177 Functional Diagram IN0+ IN0- OUT+ OUT- IN1+ IN1SEL PD Chip Information TRANSISTOR COUNT: 744 PROCESS: CMOS ______________________________________________________________________________________ 11
PAGE 12
Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) e 10LUMAX.EPS MAX9176/MAX9177 670MHz LVDS-to-LVDS and Anything-to-LVDS 2:1 Multiplexers 4X S 10 10 INCHES H ÿ 0.50±0.1 0.6±0.1 1 1 0.6±0.1 BOTTOM VIEW TOP VIEW D2 MILLIMETERS MAX DIM MIN 0.043 A 0.006 A1 0.002 A2 0.030 0.037 0.120 D1 0.116 0.118 0.114 D2 0.116 0.120 E1 E2 0.114 0.118 H 0.187 0.199 L 0.
PAGE 13
670MHz LVDS-to-LVDS and Anything-to-LVDS 2:1 Multiplexers 6, 8, &10L, QFN THIN.EPS PACKAGE OUTLINE, 6, 8 & 10L, QFN THIN (DUAL), EXPOSED PAD, 3x3x0.80 mm 21-0137 C ______________________________________________________________________________________ 13 MAX9176/MAX9177 Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.
PAGE 14
MAX9176/MAX9177 670MHz LVDS-to-LVDS and Anything-to-LVDS 2:1 Multiplexers Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) COMMON DIMENSIONS SYMBOL A MIN. MAX. 0.70 0.80 D 2.90 3.10 E 2.90 3.10 A1 0.00 0.05 L k 0.20 0.40 0.25 MIN A2 0.20 REF. PACKAGE VARIATIONS PKG. CODE N D2 E2 e JEDEC SPEC b T633-1 6 1.50±0.10 2.30±0.10 0.