SP306 Sipex, SP306 Datasheet - Page 3

• Manufacturer Part Number: SP306
• Description: RS-422/RS-423 Line Drivers/Receivers
• Manufacturer: Sipex

PINOUT
PIN ASSIGNMENTS
Pin 1 — V
Pin 2 — R
Pin 3 — R
Pin 4 — N.C. — No Connection.
Pin 5 — T
Pin 6 — T
Pin 7 — SEL A — Select A; used with Select B
(pin 8) to select operating mode; please refer to
SP306 Control Logic Configuration section for
truth table.
Pin 8 — SEL B — Select B; used with Select A
(pin 7) to select operating mode; please refer to
SP306 Control Logic Configuration section for
truth table.
Pin 9— T
Pin 10 — T
Pin 11 — N.C. — No Connection.
Pin 12— R
SIGNAL PROCESSING EXCELLENCE
Note:
1.
2.
3.
4.
5.
6.
SELECTA
SELECTB
Corporation
T
T
T
T
OUT
OUT
OUT
OUT
R
R
R
R
GND
IN
IN
N.C.
N.C.
IN
IN
V
The common mode voltage is defined as the algebraic mean of the two voltages appearing at the
receiver input terminals with respect to the receiver circuit ground.
From 10% to 90% of steady state.
This is an absolute maximum rating. Normal operating levels are V
Outputs unloaded. Inputs tied to GND; T
V
DD
A2
A1
A2
A1
B1
B2
B1
B2
Only one output drive pin per package will be shorted at any time.
OUT
OL
OUT
OUT
IN
IN
DD
IN
/V
OUT
A2 — RS422 input.
A1 — RS422/RS423 input.
10
11
12
13
14
1
2
3
4
5
6
7
8
9
B1— RS422/RS423 input.
B1— RS422/RS423 output.
OH
— +12V Power Supply.
A2 —RS422 output.
A1 — RS422/RS423 output.
B2 — RS422 output.
will typically be 3V over –55 C to +125 C with 450
SP306
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
N.C.
R
N.C.
N.C.
T
LOOPBACK
N.C.
T
N.C.
N.C.
R
N.C.
V
IN
IN
CC
OUT
OUT
EE
A
B
A
B
A
=+25 C; V
Pin 13 — R
Pin 14 — GND — Signal ground. Connected to
logic and chasis ground.
Pin 15 — V
Pin 16 — N.C. — No Connection.
Pin 17 — R
Pin 18 — N.C. — No Connection.
Pin 19 — N.C. — No Connection.
Pin 20 — T
Pin 21 — N.C. — No Connection.
Pin 22 — LOOPBACK — Active low; logic “1”
selects operating mode controlled by SELECT
A and SELECT B; logic “0” selects loopback
configuration for whatever operating mode is
selected by states of SELECT A and
SELECT B.
Pin 23 — T
Pin 24 — N.C. — No Connection.
Pin 25 — N.C. — No Connection.
Pin 26 — R
Pin 27 — N.C. — No Connection.
Pin 28 — V
FEATURES…
The SP306 is a single chip device that offers
both RS-422 and RS-423 serial interfaces. The
device can be programmed via two control mode
pins (7 and 8). In either operating mode, the
SP306 provides two full–duplex channels. A
loopback function is also provided for chip self–
test, which connects driver outputs to receiver
inputs with no external circuitry.
The RS-422 drivers convert TTL logic levels
into RS-422 differential output signals. The
RS-422 line driver outputs feature high source
IL
= 0V; LB = 0.
loads.
IN
IN
IN
EE
OUT
OUT
CC
B — TTL input.
A — TTL input.
B2— RS422 input
— –12V Power Supply.
IN
— +5V Power Supply.
B — TTL output.
A — TTL output.
5V.
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