MAX4950ACTX+T Maxim Integrated Products, MAX4950ACTX+T Datasheet

IC PCIE REDRIVER DUAL 36-TQFN

MAX4950ACTX+T

Manufacturer Part Number
MAX4950ACTX+T
Description
IC PCIE REDRIVER DUAL 36-TQFN
Manufacturer
Maxim Integrated Products
Type
Equalizerr
Datasheets

Specifications of MAX4950ACTX+T

Voltage - Supply
3.3V
Mounting Type
Surface Mount
Package / Case
36-TQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Number Of Drivers/receivers
-
Protocol
-
Lead Free Status / Rohs Status
 Details
The MAX4950A dual PCI Express
redriver operates from a single +3.3V supply. This
device improves signal integrity at the receiver through
programmable input equalization and redrive circuitry
with output deemphasis to correct for high-frequency
losses. This device permits optimal placement of key
PCIe components and longer runs of stripline,
microstrip, or cable.
The MAX4950A contains two identical channels capa-
ble of equalizing PCIe Gen I (2.5GT/s) and Gen II
(5.0GT/s) signals. The MAX4950A features electrical
idle and receiver detection on each channel and a
power-saving mode.
The MAX4950A is available in a small 36-pin (6.0mm x
6.0mm) TQFN package with flowthrough traces for opti-
mal layout and minimal space requirements. The
MAX4950A is specified over the 0°C to +70°C commer-
cial operating temperature range.
PCI Express is a registered trademark of PCI-SIG Corp.
19-4583; Rev 0; 4/09
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Servers
Industrial PCs
Test Equipment
Computers
External Graphics Applications
Communications Switchers
Storage Area Networks
________________________________________________________________ Maxim Integrated Products
General Description
Dual PCI Express Equalizer/Redriver
®
Applications
(PCIe) equalizer/
♦ Single +3.3V Supply Operation
♦ PCIe Gen I (2.5GT/s) and Gen II (5.0GT/s) Capable
♦ Very Low Latency with 280ps (typ) Propagation
♦ Individual Lane Detection
♦ Three-Level Programmable Input Equalization
♦ Three-Level Programmable Output Deemphasis
♦ Standard, -2.5dB Programmable Output Levels
♦ On-Chip 50Ω Input/Output Terminations
♦ Space-Saving, 6.0mm x 6.0mm TQFN Package
+ Denotes a lead(Pb)-free/RoHS-compliant package.
* EP = Exposed pad.
T = Tape and reel.
MAX4950ACTX+T
TOP VIEW
Delay
O_AMPA
*CONNECT EXPOSED PAD (EP) TO GND.
INEQA0
INEQA1
ODEA0
ODEA1
Excellent Differential Return Loss:
N.C.
N.C.
V
V
CC
CC
8dB (f = 1.25GHz to 2.5GHz)
PART
28
29
30
31
32
33
34
35
36
27
1
+
26
2
25
3
TEMP RANGE
Ordering Information
0°C to +70°C
24
4
MAX4950A
TQFN
23
5
Pin Configuration
22
6
21
7
20
8
*EP
PIN-PACKAGE
19
9
36 TQFN-EP*
Features
18
17
16
15
14
13
12
11
10
N.C.
V
INEQB0
INEQB1
O_AMPB
ODEB0
ODEB1
V
N.C.
CC
CC
1

Related parts for MAX4950ACTX+T

MAX4950ACTX+T Summary of contents

Page 1

... Three-Level Programmable Input Equalization ♦ Three-Level Programmable Output Deemphasis ♦ Standard, -2.5dB Programmable Output Levels ♦ On-Chip 50Ω Input/Output Terminations ♦ Space-Saving, 6.0mm x 6.0mm TQFN Package Applications PART MAX4950ACTX+T + Denotes a lead(Pb)-free/RoHS-compliant package Exposed pad Tape and reel. TOP VIEW N.C. 28 ...

Page 2

Dual PCI Express Equalizer/Redriver ABSOLUTE MAXIMUM RATINGS (Voltages referenced to GND.) V ........................................................................-0.3V to +4.0V CC All Other Pins (Note 1)................................-0. Continuous Current IN_P, IN_M, OUT_P, OUT_M ............±30mA Peak Current IN_P, IN_M, OUT_P, OUT_M (pulsed for 1µs, 1% ...

Page 3

Dual PCI Express Equalizer/Redriver ELECTRICAL CHARACTERISTICS (continued +3.0V to +3.6V 75nF coupling capacitor on each output otherwise noted. Typical values are at V PARAMETER SYMBOL Differential Output Return Loss RL (Note 5) Common-Mode ...

Page 4

Dual PCI Express Equalizer/Redriver ELECTRICAL CHARACTERISTICS (continued +3.0V to +3.6V 75nF coupling capacitor on each output otherwise noted. Typical values are at V PARAMETER SYMBOL V TX-IDLE- Electrical Idle Detect Threshold THRESH Output ...

Page 5

Dual PCI Express Equalizer/Redriver (V = +3.3V +25°C, unless otherwise noted INEQ_0 = INEQ_1 = 0, O_AMP_ = 200mV , ODE_0 = 0, ODE_1 = 0 IN P-P 600 400 200 0 -200 ...

Page 6

Dual PCI Express Equalizer/Redriver (V = +3.3V +25°C, unless otherwise noted INEQ_0 = 1, INEQ_1 = 0, O_AMP_ = 0, V WITH 6in STRIPLINE ODE_0 = ODE_1 = 0 600 400 200 0 -200 -400 -600 ...

Page 7

Dual PCI Express Equalizer/Redriver PIN NAME 19, GND Ground 22, 24 INAP Noninverting Input A 3 INAM Inverting Input A Enable Input. Drive EN low for standby mode. Drive EN high for normal mode. ...

Page 8

Dual PCI Express Equalizer/Redriver MAX4950A INEQ_0 INEQ_1 IN_P IN_M EQUALIZER R HI ELECTRICAL IDLE DETECTOR Figure 2. Block Diagram of Each Channel 8 _______________________________________________________________________________________ EN RX_DET O_AMP_ GLOBAL POWER SAVE RECEIVER DETECT MANAGER EQUALIZER ODE_0 ODE_1 OUT_P OUT_M ...

Page 9

Dual PCI Express Equalizer/Redriver Detailed Description The MAX4950A dual equalizer/redriver is designed to support both Gen I (2.5GT/s) and Gen II (5.0GT/s) PCIe data rates. The device contains two identical drivers with idle/receive detect on each lane and equalization to ...

Page 10

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2009 Maxim Integrated Products ...

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