Ethernet CentreCOM Micro Transceivers 10Base-T AT-MX60T 10Base-2 AT-MX70 IEEE 802.3 COMPLIANT/ETHERNET COMPATIBLE The CentreCOM Micro Transceivers are The AT-MX60T transceiver incorporates 10Base-2 and 10Base-T compliant other functions that offer improved • Ethernet connectivity for Macs, PCs Ethernet transceivers. Electrical connec- network reliability for workstations. The and printers with built-in Ethernet tions and power are supplied via the 10Base-T link integrity test function pro- card and 14-pin AAUI connector Apple Attachment Unit Interface (AAUI) vides a continuous test of the connection • One-half meter cable with AAUI 14-pin D sub-connector. Compact size to the multiport repeater. and latch foreither desk placement and one-half meter integral cables allow or back drop these transceivers to bring thin Ethernet A test pulse is periodically transmitted or Unshielded Twisted Pair (UTP) wiring and expected at the companion transceiv- • Switch-selectable SQE test and LED directly to the workstation or printer er’s receive side. If the pulse is not seen which contains an AAUI Ethernet port. on the receive side, the transceiver is • Polarity detection and With UTP and inexpensive coax network placed into link test fail mode. Normal correction (both models) media, distances up to 100 meters between operation of the transmit side is inhibited and LED (AT-MX60T) work-stations can be supported using and the “Link” LED is turned off. Normal UTP, and up to 185 meters using coax. operation is resumed when the link is • Link integrity test function re-established by the reception of a valid and LED (AT-MX60T) The 10Base-2 compliant AT-MX70 packet or two valid link pulses. • Lifetime warranty transceiver uses an industry-standard Ethernet transceiver chip that guarantees Another function of these 10Base-T IEEE 802.3 compliance. The 10Base-T transceiver addresses the polarity of the compliant AT-MX60T transceiver is receive pair wiring. In less than one also guaranteed compliant by the use second, the UTP transceiver will automat- of standard ICs. ically “roll” the wire pair and proper operation of the transceiver becomes Signal Quality Error (SQE)/ Heartbeat possible. No further action is required to test can easily be enabled or disabled via ensure proper operation. Also, the an externally accessible switch on both “Polarity” indicator on the AT-MX60T models. Additionally, both models have transceiver is not illuminated when the integral jabber lock-up prevention circuitry has transposed the receive pair. circuitry and a loopback function. This function emulates coaxial media where SQE/Heartbeat test status is indicated transmitted packets are looped back to the by LEDs on both the AT-MX70 and receive side. Local Area Network (LAN) AT-MX60T transceivers. The AT-MX70 controllers can use the loopback feature utilizes a two-color LED that indicates to determine if a Media Attachment Unit the presence of Data Terminal Equipment (MAU) is connected and operational. (DTE) power in addition to the SQE test. The AT-MX60T has a single LED that indicates the status of the SQE test switch. Specifications on next page AT-MX60T, AT-MX70 Specifications STATUS INDICATORS TWISTED PAIR INTERFACE ORDERING INFORMATION AT-MX60T: Transmitter: Typical Range Part Number Description | | Power Power is present from the DTE AT-MX60T AAUI micro transceiver Peak Differential Link A valid link exists with RJ45 connector Signal Amplitude 2.5 V 2.2 to 2.8 V SQE Test SQE/Heartbeat test enabled AT-MX70 AAUI micro transceiver Transmitter Jitter ±1.5 ns ±2 ns Polarity Automatic polarity reversal has with BNC connector Harmonics Content 27 dB Down not occurred Common Mode Output Voltage AT-MX70: Start-Up Delay 100 ns 200 ns Power/HB Two-color Power/Heartbeat LED Steady State Delay 100 ns 200 ns AAUI INTERFACE Silence Voltage ±50 mV Transmitter: Typical Range | | Duration 16 ms 8 to 130 ms Threshold Voltage -200 mV -175 to -225 mV Link Test Pulse 100 ns 80 to 130 ns SQE Test Output Impedance 100 Ω 95 to 105 Ω Delay 800 ns 600 to 1600 ns Receiver: Duration 1000 ns 500 to 1500 ns Receiver Threshold -400 mV -350 to -450 mV Collision Input Impedance 100 Ω 95 to 105 Ω Indication Delay 200 ns 900 ns Differential Noise Assert Delay 200 ns 900 ns Rejection 300 mV Jabber Setup 45 ms 20 to 100 ms POWER CHARACTERISTICS Recovery 450 ms 250 to 750 ms Isolation: Receiver: Breakdown Voltage Start-Up Delay 500 ns AT-MX60T 1500 V rms 50/60 Hz for 1 min AT-MX70 500 V rms 50/60 Hz for 1 min Steady State Delay 100 ns 200 ns Supply: Typical Range Signal Amplitude ±800 mV ±550 to | | ±1200 mV Voltage 5 V 4.75 to 5.25 V Loopback Current 380 mA 500 mA Steady State Delay 100 ns Start-Up Delay 100 ns 500 ns PHYSICAL CHARACTERISTICS Dimensions: TWISTED PAIR CONNECTOR (RJ45) Transceiver 6.4 cm x 4.6 cm x 2.0 cm (2.5 in x 1.8 in x 0.8 in) Pin No. Function Cable 50 cm plus AAUI connector 1 +TD 2 -TD Weight: 105 grams (3.7 oz) 3 +RD Temperature: 4 Not Used Operating 0° to 50° C 5 Not Used Storage -20° to 60° C Allied Telesyn International 6 -RD Relative Humidity: 5% to 80% noncondensing 7 Not Used and Affiliate Locations 8 Not Used Canada Electrical/Mechanical Approvals: EMI FCC Class A, TUV, Vfg-B Germany C OAXIAL INTERFACE Safety UL, CSA, TUV-GS France Italy Input Impedance >100K Ω Coaxial Tap Capacitance <6 pf United States United Kingdom Input/Output Japan Voltage: Typical Range | | Singapore DC Offset -0.1 V -0.5 to 0 V Australia AC Offset 1.86 Vp-p 1.2 to 2.4 Vp-p Hong Kong Transmit Rise/ Fall Time 25 ns ±5 ns 950 Kifer Road Sunnyvale California 94086 USA Telephone Fax 408.730.0950 408.736.0100 Website Address http://www.alliedtelesyn.com © 1997 Allied Telesyn International Corp. All rights reserved. Information in this document is subject to change without notice. AT-View is a trademark of Allied Telesyn International Corp. All company names, logos, and product designs that are trademarks or registered trademarks are the property of their respective owners. 617-00151-00 S-10M960918