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NE83Q93D

Enhanced coaxial Ethernet transceiver

Philips Electronics 

Philips Semiconductors

Enhanced coaxial Ethernet transceiver

Product specification

NE83Q93

ELECTRICAL CHARACTERISTICS

VEE = –9V ±6%; TA = 0°C to +70°C unless otherwise specified1,2. No external isolation.

LIMITS

SYMBOL

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VUVL

Under voltage lockout. Transceiver disabled for

|VEE| < |VUVL|

Supply current idle

–7.5

V

–15

–20

mA

IEE

Supply current transmitting (without collision)

Without external

pull-down resistors and

no LED loads

–80

–90

mA

IRXI

ICDS

VIH

VIL

IIH

IIL

VTENH

VTENL

ITENL

ITDC

ITAC

ITX10

VTCOM

VCD

Receive input bias current

Cable sense input bias current

HBE input HIGH voltage

HBE input LOW voltage

HBE input HIGH current

HBE input LOW current

Input HIGH voltage at TEN

Input LOW voltage at TEN

Input LOW current at TEN

Transmit output DC current level3

Transmit output AC current level3

Transmit current

Transmitter output voltage compliance4

Collision threshold5

VRXI = 0V

VCDS = 0V

VHBE = 0V

VHBE = VEE

–2

+25

µA

+1

+3

µA

VEE +2.4

V

VEE +1.6

V

+10

µA

–30

µA

VEE + 2

V

VEE + 1

V

–50

–100

µA

–37

–45

mA

VTXO = –10V

±28

–250

±ITDC

mA

+250

µA

–3.7

V

Measured by applying

DC voltage at RXI

–1450

–1530

–1580

mV

(CDS = 0V)

VDIS

AUI disable voltage at RXI

Measured as DC

voltage at RXI

–3.5

V

VOD

Differential output voltage – non idle at RX+ and

CD±6

VOB

Differential output voltage imbalance – idle at

RX± and CD±7

VOC

Output common mode voltage at RX± and CD±

RXI = 0V

VRS

Receiver squelch threshold

VRXI average DC

(CDS = 0V)

±600

–4.0

–150

–5.5

–250

±1100

mV

±40

mV

–7.0

V

–350

mV

VTS

Transmitter squelch threshold

RRXI

CRXI

Shunt resistance at RXI non–transmitting

Input capacitance at RXI8

RTXO

RAUIZ

Shunt resistance at TXO transmitting

Differential impedance at RX± and CD± with no

coaxial cable connected

RTX

Differential impedance at TX±

LED driver and CRS output

(VTX+ – VTX–) peak

–175

100

7.5

–225

1

10

6

20

–275

mV

kΩ

2

pF

kΩ

kΩ

kΩ

VOL

Output LOW voltage

IOL

Output leakage current inactive

IOUT = 8mA

VEE < VOUT < VEE + 5

VEE +1.4

V

10

µA

NOTES:

1. Currents flowing into device pins are positive. All voltages are referenced to ground unless otherwise specified. For ease of interpretation,

the parameter limit that appears in the MAX column is the largest value of the parameter, irrespective of sign. Similarly, the value in the MIN

column is the smallest value of the parameter, irrespective of sign.

2. All typicals are for VEE = –9V and TA = 27°C.

3. ITDC is measured as (VMAX + VMIN)/(2 x 25) where VMAX and VMIN are the max and min voltages at TXO with a 25Ω load between TXO and

GND. ITAC is measured as (VMAX – VMIN)/(2 x 25).

4. The TXO pin shall continue to sink at least ITDC min when the idle (no signal) voltage on this pin is –3.7V.

5. Collision threshold for an AC signal is within 5% of VCD.

6. Measured on secondary side of isolation transformer (see Connection Diagram, Figure 1). The transformer has a 1:1 turns ratio with an

inductance between 30 and 100µH at 5MHz.

7. Measured as the voltage difference between the RX pins or the CD pins with the transformer removed.

8. Not 100% tested in production.

1995 May 1

4

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