SN75061 Datasheet, PDF (3/13 Pages) Texas Instruments – DRIVER/RECEIVER PAIR WITH SQUELCH

ą
logic symbol^†
14
DRI
13
DLEN
1
DRDLAJ
15
DATEN
&
X [ADJDEL]
5
RXI+
6
RXI −
7
SQTHAJ
9
SQRXO
1
Z1
2
Z2
1
2
X ^[ADJTHRES]
SQDLI ¹⁰
SN75061
DRIVER/RECEIVER PAIR WITH SQUELCH
ą
SLLS026C − JANUARY 1987 − REVISED JULY 1990
≥1
EN
2 _DRO+
3 _{DRO −}
1
12
3
RXO
1
≥1
V3
11
SQO
4
SQDLAJ
X [ADJDEL]
† _{This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.}
description
The SN75061 is a single-channel driver/receiver pair designed for use in IEEE 802.3, 1BASE5 applications as
well as other general data communications circuits. The SN75061 offers both a driver and a receiver that are
easily configured for use with a variety of controllers and data encoder/decoders.
The receiver features a full analog squelch circuit with an adjustable threshold and a programmable squelch
delay. Internal nodes of the squelch circuitry are brought out to external connections to allow for the insertion
of noise-filtering circuitry of the designer’s choice.
As with the receiver, the driver offers a variety of implementation options. Driver enabling may be directly
controlled by an external logic input or by use of an on-chip one-shot that is retriggered as long as data is being
sent to the driver. The driver then automatically goes to the high-impedance state when end-of-packet common
phrase occurs. The driver features internal slew-rate control for optimal matching of rise and fall times allowing
for reduction of driver-induced jitter.
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