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78Q2120C
10/100BASE-TX Transceiver
Industry's First 3.3V Fast Ethernet PHY
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Status
Active: In Production.
Description
The 78Q2120C is a 10BASE-T/100BASE-TX Fast Ethernet transceiver. It includes integrated media independent interface (MII), ENDECs, scrambler/descrambler, dual-speed clock recovery, and full-featured autonegotiation function. The transmitter includes an on-chip pulse-shaper and a low-power line driver. The receiver has an adaptive equalizer and a baseline restoration circuit required for accurate clock and data recovery. The transceiver interfaces to Category-5 unshielded twisted pair (Cat-5 UTP) cabling for 100BASE-TX/10BASE-T and Category-3 unshielded twisted pair for 10BASE-T. Connection to the line media is through 1:1 isolation transformers. No external filter is required. Interface to the MAC is accomplished through an IEEE® 802.3-compliant MII. The product is fabricated in an advanced CMOS process for high performance and low power operation.
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Data Sheet
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An evaluation kit is available: 78Q2120C09-DB
Key Features
- 10BASE-T/100BASE-TX IEEE 802.3-Compliant Tx and Rx Functions Requiring a Dual 1:1 Isolation Transformer Interface to the Line
- Integrated MII, 10BASE-T/100BASE-TX ENDEC, 100BASE-TX Scrambler/Descrambler, and Full-Featured Autonegotiation Function
- Full-Duplex Operation Capable
- PCS Bypass Supports 5-Bit Symbol Interface
- Register-Programmable Transmit Amplitude
- Dual-Speed Digital Clock Recovery
- Automatic Polarity Correction During Autonegotiation and 10BASE-T Signal Reception
- Power-Saving and Power-Down Modes Including Transmitter Disable
- LED Indicators: LINK, TX, RX, COL, 100, 10, FDX
- User-Programmable Interrupt Pin
- 64-Pin TQFP (JEDEC LQFP) Package
- Single 3.3V ± 0.3V Supply
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Applications/Uses
- Consumer Electronics
- IP Cameras
- Print Servers
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Key Specifications:
| Ethernet and SDH/PDH Transceivers |
| Part Number |
Ethernet Media Type |
Features |
VSUPPLY
(V) |
EV Kit |
Oper. Temp.
(°C) |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| max w/pins |
See Notes |
| 78Q2120C |
Twisted Pair |
| Full Duplex | | Power Down/Save |
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3.3 |
No |
0 to +70 |
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146.4 |
$3.06 @1k |
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See All Ethernet and SDH/PDH Transceivers (5)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Reliability Reports
| Request Reliability Report for: |
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Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| 78Q2120C09-64CGT/F
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Active |
LQFP;64 pin;146.4 mm²
Land Pattern: Not Applicable
Use pkgcode/variation: C64L+6*
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0°C to +70°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| 78Q2120C09-CGTR/F
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Active |
LQFP;64 pin;146.4 mm²
Land Pattern: Not Applicable
Use pkgcode/variation: C64L+6*
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0°C to +70°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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Information Index
Document Ref.: 19-5355
Rev 1;
2010-07-27
This page last modified: 2010-07-27
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