Philips ne83q93 DATASHEETS

Philips Semiconductors	Product specification
Enhanced coaxial Ethernet transceiver	NE83Q93

DESCRIPTION

The NE83Q93 is a low power coaxial transceiver interface (CTI) for

Ethernet (10base5) and Thin Ethernet (10base2) local area networks. The CTI is connected between the coaxial cable and the Data Terminal Equipment (DTE) and consists of a receiver, transmitter, receive-mode collision detector, heartbeat generator and jabber timer (see Block Diagram). The transmitter output connects directly to a doubly terminated 50Ω cable, while the receiver output, collision detector output and transmitter input are connected to the

DTE through isolation transformers. Isolation between the CTI and the DTE is an IEEE 802.3 requirement that can be met on signal lines by using a set of pulse transformers. Power isolation for the CTI is achieved using DC-to-DC conversion through a power transformer (see Figure 1, Connection Diagram).

The part is functionally the same as the NE83Q92, but with additional features such as a transmit enable input, a carrier detect output and five status LED driver outputs.

The NE83Q93 is manufactured on an advanced BiCMOS process and is available in an SOL package making it ideally suited to lap-top personal computers or systems where low power consumption, limited board space and jumperless design is required. Refer to selection flow chart for optimal application.

FEATURES

•Fully compliant with Ethernet II, IEEE 802.3 10BASE-5 and

10BASE-2, and ISO 8802/3 interface specifications

•Functionally compatible with industry standard 8392 applications

•Optimal implementation can use 1 Watt DC-DC converter and reduces external parts count

•High efficiency AUI drivers minimize current consumption under idle conditions by automatically powering-down

•Automatically disables AUI drivers when disconnecting coax cable, allowing hard-wiring of AUI connector and local/integrated

CTI connection

PIN CONFIGURATION

D, N Packages

CD+	1				24	CDS
CD±	2				23	TXO
RX+	3				22	RXI
VEE	4				21	VEE
VEE	5				20	RR±
RX±						RR+
	6				19
TX+	7				18	GND
TX±						HBE
	8				17
TEN	9				16	CRS
XLED	10				15	RLED
JLED	11				14	LINK
LCOM	12				13	CLED

SD00311

•Smart squelch on data inputs eliminates false activations

•Transmit enable input and carrier sense output for repeater applications

•Five LED status drivers for transmit, receive, collision, jabber and link fail indication

•Advanced BiCMOS process for extremely low power operation

•Available in 24-pin DIP and 24-pin SOL packages

•Full ESD protection

•Power-on reset prevents glitches on coaxial cable

ORDERING INFORMATION

DESCRIPTION	TEMPERATURE RANGE	ORDER CODE	DWG #
24-Pin Plastic Dual In-Line Package (DIP)	0 to +70°C	NE83Q93N	0410D
24-Pin Plastic Small Outline Large (SOL) Package	0 to +70°C	NE83Q93D	SOT137-1

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853-1738 15180

Philips Semiconductors	Product specification
Enhanced coaxial Ethernet transceiver	NE83Q93

PIN DESCRIPTIONS

PIN NO.	SYMBOL	DESCRIPTION
D, N PKG
1	CD+	Collision Outputs. Balanced differential line driver outputs which send a 10MHz signal to the DTE in the event of
2	CD±	a collision, jabber interrupt or heartbeat test. External pull-down resistors are optional.
3	RX+	Receiver Outputs. Balanced differential line driver outputs which send the received signal to the DTE. External
6	RX±	pull-down resistors are optional.
7	TX+	Transmitter Inputs. Balanced differential line receiver inputs which accept the transmission signal from the DTE
8	TX±	and apply it to the coaxial cable at TXO, if it meets Tx squelch threshold.
		Transmit Enable. A CMOS compatible input requiring an input voltage range of VEE to VEE + 5V. The transmitter
9	TEN	and loopback functions are disabled when TEN is LOW and enabled when TEN is HIGH or left floating. TEN is
		normally driven through an opto-coupler.

10XLED Transmit Indicator. Indicates a packet is being transmitted onto the coaxial cable.

11JLED Jabber Indicator. Indicates that the jabber timer has timed out and the coaxial driver is disabled.

12LCOM LED Common. The anodes of all status indicator LEDs are connected to this pin. It's voltage is VEE + 5V.

13CLED Collision Indicator. Indicates that a collision has been detected.

14LINK Link Indicator. Indicates that a connection is present to the coaxial cable network.

15RLED Receive Indicator. Indicates that a packet is being received from the coaxial cable.

	16	CRS	Carrier Sense. A real time output that indicates the presence of a carrier on the coaxial cable. CRS is normally
			used to drive an opto-coupler.
	17	HBE	Heartbeat Enable. The heartbeat function is disabled when this pin is connected to VEE and enabled when
			connected to GND or left floating.
	11	RR+	External Resistor. A 1kΩ (1%) resistor connected between these pins establishes the signaling current at TXO.
	12	RR±
	22	RXI	Receiver Input. This pin is connected directly to the coaxial cable. Received signals are equalized, amplified,
			and sent to the DTE through the RX+ pins, if it meets Rx squelch threshold.
	23	TXO	Transmitter Output. This pin is connected directly (Thin Ethernet) or through an external isolating diode
			(Ethernet) to the coaxial cable.
	24	CDS	Collision Detect Sense. Ground sense connection for the collision detection circuitry. This pin should be
			connected directly to the coaxial cable shield for standard Ethernet operation.
	18	GND	Positive Supply Pin.
	4
	5	VEE	Negative supply pins.
	21

NOTE:

1. The IEEE 802.3 name for CD is CI; for RX is DI; for TX is DO.

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Philips Semiconductors	Product specification
Enhanced coaxial Ethernet transceiver	NE83Q93

BLOCK DIAGRAM

COAX					DTE
					INTERFACE
CABLE
RXI	BUFFER		LINE
	RECEIVER		DRIVER		RECEIVE
					PAIR
	EQUALIZER
					(RX+, RX±)
	4±POLE BESSEL	RECEIVER			CARRIER
	LOW PASS FILTER	SQUELCH			SENSE
					(CRS)
TXO					TRANSMIT
		TRANSMITTER			PAIR
					(TX+, TX±)
CDS
	SENSE				LINK
	BUFFER			STATUS
					COLLISION
		TRANSMITTER		CONTROL
					(CLED)
		SQUELCH
TEN					JABBER
					(JLED)
					XLED
		COLLISION			RLED
		COMPARATOR			LCOM
HBE		&
		HEARTBEAT
		GENERATOR
			10MHz		COLLISION
					PAIR
			OSC
					(CD+, CD±)
		JABBER		LINE
		TIMER		DRIVER
					SD00312

ABSOLUTE MAXIMUM RATINGS

SYMBOL	PARAMETER	RATING	UNIT
V	Supply voltage1	±12	V
EE
V	Voltage at any input1	0 to ±12	V
IN
TSTG	Storage temperature range	±65 to +150	°C
TSOLD	Lead soldering temperature (10sec.)	+300	°C
T	Recommended max junction temperature2	+150	°C
J
θJA	Thermal impedance (N and A packages)	60	°C/W

NOTE:

1.100% measured in production.

2.The junction temperature is calculated from the following expression:

TJ = TA + θJA [(VEE x 0.015 x nIDL) + (VEE x 0.027 x nRX) + (VEE x 0.075 x nTX)] where

TA	=	Ambient temperature in °C.
θJA	=	Thermal resistance of package.
VEE =		Normal operating supply voltage in volts.
nIDL =		Percentage of duty cycle idle
nRX =		Percentage of duty cycle receiving
nTX	=	Percentage of duty cycle transmitting

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Philips Semiconductors	Product specification
Enhanced coaxial Ethernet transceiver	NE83Q93

ELECTRICAL CHARACTERISTICS

V = ±9V ±6%; T = 0°C to +70°C unless otherwise specified1,2. No external isolation.
EE	A
				LIMITS
SYMBOL	PARAMETER	TEST CONDITIONS	MIN	TYP	MAX	UNIT
VUVL	Under voltage lockout. Transceiver disabled for			±7.5		V
	|VEE| < |VUVL|
	Supply current idle			±15	±20	mA
IEE		Without external
	Supply current transmitting (without collision)	pull-down resistors and		±80	±90	mA
		no LED loads
IRXI	Receive input bias current	VRXI = 0V	±2		+25	μA
ICDS	Cable sense input bias current	VCDS = 0V		+1	+3	μA
VIH	HBE input HIGH voltage		VEE +2.4			V
VIL	HBE input LOW voltage				VEE +1.6	V
IIH	HBE input HIGH current	VHBE = 0V			+10	μA
IIL	HBE input LOW current	VHBE = VEE	±30			μA
VTENH	Input HIGH voltage at TEN			VEE + 2		V
VTENL	Input LOW voltage at TEN			VEE + 1		V
ITENL	Input LOW current at TEN			±50	±100	μA
I	Transmit output DC current level3		±37		±45	mA
TDC
I	Transmit output AC current level3		±28		±I	mA
TAC					TDC
ITX10	Transmit current	VTXO = ±10V	±250		+250	μA
V	Transmitter output voltage compliance4				±3.7	V
TCOM
	Collision threshold5	Measured by applying
VCD		DC voltage at RXI	±1450	±1530	±1580	mV
		(CDS = 0V)
VDIS	AUI disable voltage at RXI	Measured as DC		±3.5		V
		voltage at RXI
VOD	Differential output voltage ± non idle at RX+ and		±600		±1100	mV
	6
	CD±
VOB	Differential output voltage imbalance ± idle at				±40	mV
	7
	RX± and CD±
VOC	Output common mode voltage at RX± and CD±	RXI = 0V	±4.0	±5.5	±7.0	V
VRS	Receiver squelch threshold	VRXI average DC	±150	±250	±350	mV
		(CDS = 0V)
VTS	Transmitter squelch threshold	(VTX+ ± VTX±) peak	±175	±225	±275	mV
RRXI	Shunt resistance at RXI non±transmitting		100			kΩ
CRXI	Input capacitance at RXI8			1	2	pF
RTXO	Shunt resistance at TXO transmitting		7.5	10		kΩ
RAUIZ	Differential impedance at RX± and CD± with no			6		kΩ
	coaxial cable connected
RTX	Differential impedance at TX±			20		kΩ
LED driver and CRS output
VOL	Output LOW voltage	IOUT = 8mA			VEE +1.4	V
IOL	Output leakage current inactive	VEE < VOUT < VEE + 5			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.

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