Datasheet

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General Description

The MAX9174/MAX9175 are 670MHz, low-jitter, low-

skew 1:2 splitters ideal for protection switching, loop-

back, and clock and signal distribution. The devices

feature ultra-low 1.0ps

(RMS)

random jitter (max) that

ensures reliable operation in high-speed links that are

highly sensitive to timing errors.

The MAX9174 has a fail-safe LVDS input and LVDS out-

puts. The MAX9175 has an anything differential input

(CML/LVDS/LVPECL) and LVDS outputs. The outputs

can be put into high impedance using the power-down

inputs. The MAX9174 features a fail-safe circuit that dri-

ves the outputs high when the input is open, undriven

and shorted, or undriven and terminated. The MAX9175

has a bias circuit that forces the outputs high when the

input is open. The power-down inputs are compatible

with standard LVTTL/LVCMOS logic. The power-down

inputs tolerate undershoot of -1V and overshoot of V

+ 1V. The MAX9174/MAX9175 are available in 10-pin

µMAX and 10-lead thin QFN with exposed pad pack-

ages, 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

♦ 80ps

(P-P)

Jitter (max) at 800Mbps Data Rate

♦ +3.3V Supply

♦ LVDS Fail-Safe Inputs (MAX9174)

♦ Anything Input (MAX9175) Accepts Differential

CML/LVDS/LVPECL

♦ Power-Down Inputs Tolerate -1.0V and V

+ 1.0V

♦ Low-Power CMOS Design

♦ 10-Lead µMAX and Thin QFN Packages

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

♦ Conform to ANSI TIA/EIA-644 LVDS Standard

♦ IEC 61000-4-2 Level 4 ESD Rating

MAX9174/MAX9175

670MHz LVDS-to-LVDS and Anything-to-LVDS

1:2 Splitters

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

CLK IN

ASIC

CLOCK DISTRIBUTION

CLK IN

ASIC

CLK1

CLK2

MAX9174

MAX9176

Typical Application Circuit

19-2827; Rev 1; 4/04

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.

PART TEMP RANGE PIN-PACKAGE

MAX9174EUB -40°C to +85°C 10 µMAX

MAX9174ETB* -40°C to +85°C 10 Thin QFN-EP**

MAX9175EUB -40°C to +85°C 10 µMAX

MAX9175ETB* -40°C to +85°C 10 Thin QFN-EP**

*Future product—contact factory for availability.

**EP = Exposed paddle.

Functional Diagram and Pin Configurations appear at end

of data sheet.

Summary of content (14 pages)

PAGE 1
9-2827; Rev 1; 4/04 670MHz LVDS-to-LVDS and Anything-to-LVDS 1:2 Splitters Features The MAX9174/MAX9175 are 670MHz, low-jitter, lowskew 1:2 splitters ideal for protection switching, loopback, and clock and signal distribution. The devices feature ultra-low 1.0ps (RMS) random jitter (max) that ensures reliable operation in high-speed links that are highly sensitive to timing errors. ♦ 1.0ps(RMS) Jitter (max) at 670MHz The MAX9174 has a fail-safe LVDS input and LVDS outputs.
PAGE 2
MAX9174/MAX9175 670MHz LVDS-to-LVDS and Anything-to-LVDS 1:2 Splitters 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 PD0, PD1 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 1:2 Splitters (VCC = +3.0V to +3.6V, RL = 100Ω ±1%, PD_ = high, differential input voltage |VID| = 0.05V to 1.2V, MAX9174 input common-mode voltage VCM = |VID /2| to (2.4V - |VID /2|), MAX9175 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
MAX9174/MAX9175 670MHz LVDS-to-LVDS and Anything-to-LVDS 1:2 Splitters AC ELECTRICAL CHARACTERISTICS (VCC = +3.0V to +3.6V, RL = 100Ω±1%, CL = 5pF, differential input voltage |VID| = 0.15V to 1.2V, MAX9174 input common-mode voltage, VCM = |VID/2| to (2.4V - |VID/2|), MAX9175 input common-mode voltage VCM = |VID/2| to (VCC - |VID/2|), PD_ = high, 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 1:2 Splitters 34 33 380 280 370 360 350 340 330 -15 10 35 60 tPHL 2.5 2.4 2.3 2.2 tPLH 10 8 6 35 60 40 35 20 -15 10 35 60 85 0 100 200 300 400 500 600 700 800 TEMPERATURE (°C) TEMPERATURE (°C) FREQUENCY (MHz) SUPPLY CURRENT vs. DATA RATE SUPPLY CURRENT vs. SUPPLY VOLTAGE OUTPUT RISE/FALL TIME vs.
PAGE 6
Typical Operating Characteristics (continued) ((MAX9174) VCC = +3.3V, |VID| = 0.15V, VCM = 1.25V, TA = +25°C, RL = 100Ω ±1%, CL = 5pf, PD_ = VCC, unless otherwise noted.) 2.7 2.6 tPHL 2.5 2.4 2.3 tPLH 2.2 2.1 8 7 6 5 4 3 2 1 2.0 0 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.2 3.3 3.4 3.5 400 350 300 250 3.6 50 60 70 80 90 100 110 120 130 140 150 SUPPLY VOLTAGE (V) LOAD RESISTANCE (Ω) PROPAGATION DELAY vs. INPUT COMMON-MODE VOLTAGE 2.7 3.0 2.6 tPHL 2.4 tPLH fIN = 155MHz 2.
PAGE 7
670MHz LVDS-to-LVDS and Anything-to-LVDS 1:2 Splitters PIN NAME µMAX QFN 1 1 2 3 FUNCTION IN+ Noninverting Differential Input 2 IN- Inverting Differential Input 3 GND Ground 4 4 PD1 LVTTL/LVCMOS Input. OUT1+, OUT1- are high impedance to ground when PD1 is low. Internal pulldown resistor to GND. 5 5 PD0 LVTTL/LVCMOS Input. OUT0+, OUT0- are high impedance to ground when PD0 is low. Internal pulldown resistor to GND.
PAGE 8
MAX9174/MAX9175 670MHz LVDS-to-LVDS and Anything-to-LVDS 1:2 Splitters When the input is driven with a differential signal of |VID| = 50mV to 1.2V within a voltage range of 0 to 2.4V, the fail-safe circuit is not activated. If the input is open, undriven and shorted, or undriven and terminated, an internal resistor in the fail-safe circuit pulls the input above VCC - 0.3V, activating the fail-safe circuit and forcing the outputs high (Figure 1).
PAGE 9
670MHz LVDS-to-LVDS and Anything-to-LVDS 1:2 Splitters MAX9174/MAX9175 OUT_+ 5kΩ OUT_+ 1.25V IN+ 1.20V 1.25V IN- VOD VTEST = 0 TO VCC RL 1.20V 1.25V IN+ 1.20V 1.25V IN- RL/2 VOS 1.20V OUT_ - RL/2 5kΩ OUT_ - Figure 2. VOD Test Circuit Figure 3. VOS Test Circuit 5kΩ OUT1+ RL OUT15kΩ CL CL VTEST = 0 TO VCC 5kΩ OUT0+ IN+ PULSE GENERATOR RL INOUT0- 50Ω 5kΩ 50Ω CL CL Figure 4.
PAGE 10
MAX9174/MAX9175 670MHz LVDS-to-LVDS and Anything-to-LVDS 1:2 Splitters IN- IN+ tPHL tPLH OUT_- OUT_+ VOS = ((VOUT_+) + (VOUT_-))/2 80% 80% VOD+ 0V 0V (OUT_+) - (OUT_-) 20% 20% tR VOD- tF Figure 5. Transition Time and Propagation Delay Timing IN+ IN- OUT0+ OUT0- OUT1+ OUT1tSKOO tSKOO Figure 6.
PAGE 11
670MHz LVDS-to-LVDS and Anything-to-LVDS 1:2 Splitters MAX9174/MAX9175 VCC + 1V VCC PD_ VCC/2 0 -1.0V tPD tPU VOH OUT_+ WHEN VID = +50mV 50% 50% OUT_- WHEN VID = -50mV 1.25V 1.25V OUT_+ WHEN VID = -50mV 50% 50% OUT_- WHEN VID = +50mV VOL tPD tPU Figure 7. Power-Up/Down Delay Waveform MAX9174 MAX9175 1.25V OUT1+ RL/2 IN+ 1.20V 1.25V OUT1- 1.25V RL/2 INOUT0+ 1.20V RL/2 OUT0- RL/2 1.25V PULSE GENERATOR 50Ω Figure 8.
PAGE 12
MAX9174/MAX9175 670MHz LVDS-to-LVDS and Anything-to-LVDS 1:2 Splitters RD 330Ω RC 50Ω TO 100Ω DISCHARGE RESISTANCE CHARGE-CURRENTLIMIT RESISTOR HIGHVOLTAGE DC SOURCE Cs 150pF RC 1MΩ CHARGE-CURRENTLIMIT RESISTOR DEVICE UNDER TEST STORAGE CAPACITOR Figure 9. IEC 61000-4-2 Contact Discharge ESD Test Model HIGHVOLTAGE DC SOURCE Cs 100pF RD 1.5kΩ DISCHARGE RESISTANCE DEVICE UNDER TEST STORAGE CAPACITOR Figure 10.
PAGE 13
670MHz LVDS-to-LVDS and Anything-to-LVDS 1:2 Splitters 10LUMAX.EPS e 4X S 10 INCHES 10 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 A 0.043 A1 0.006 0.002 A2 0.030 0.037 D1 0.116 0.120 D2 0.114 0.118 E1 0.116 0.120 E2 0.114 0.118 H 0.187 0.199 L 0.0157 0.0275 L1 0.037 REF b 0.007 0.0106 e 0.0197 BSC c 0.0035 0.0078 0.0196 REF S α 0∞ 6∞ MAX MIN 1.10 0.15 0.05 0.75 0.95 3.05 2.95 2.89 3.00 2.95 3.05 2.89 3.00 4.75 5.05 0.40 0.70 0.940 REF 0.177 0.270 0.
PAGE 14
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.) 6, 8, &10L, DFN THIN.EPS MAX9174/MAX9175 670MHz LVDS-to-LVDS and Anything-to-LVDS 1:2 Splitters L A D D2 A2 PIN 1 ID 1 N 1 C0.35 b E PIN 1 INDEX AREA [(N/2)-1] x e REF.