LTC1544 Linear Technology, LTC1544 Datasheet - Page 5

• Manufacturer Part Number: LTC1544
• Description: Software-Selectable Multiprotocol Transceiver
• Manufacturer: Linear Technology

PI FU CTIO S
V
V
V
V
capacitor to ground.
D1 (Pin 3): TTL Level Driver 1 Input.
D2 (Pin 4): TTL Level Driver 2 Input.
D3 (Pin 5): TTL Level Driver 3 Input.
R1 (Pin 6): CMOS Level Receiver 1 Output.
R2 (Pin 7): CMOS Level Receiver 2 Output.
R3 (Pin 8): CMOS Level Receiver 3 Output.
D4 (Pin 9): TTL Level Driver 4 Input.
R4 (Pin 10): CMOS Level Receiver 4 Output.
M0 (Pin 11): TTL Level Mode Select Input 0 with Pull-Up
to V
M1 (Pin 12): TTL Level Mode Select Input 1 with Pull-Up
to V
M2 (Pin 13): TTL Level Mode Select Input 2 with Pull-Up
to V
DCE/DTE (Pin 14): TTL Level Mode Select Input with
Pull-Up to V
TEST CIRCUITS
CC
CC
DD
DD
U
CC
CC
CC
(Pin 1): Positive Supply for the Transceivers. 4.75V
(Pin 2): Positive Supply Voltage for V.28. Connect to
Pin 3 on LTC1543 or 8V supply. Connect a 1 F
5.25V. Connect a 1 F capacitor to ground.
.
.
.
U
CC
.
Figure 1. V.11 Driver Test Circuit
A
B
U
V
OD
R
50
R
50
L
L
V
OC
1544 F01
INVERT (Pin 15): TTL Level Mode Select Input with Pull-
Up to V
D4/R4 A (Pin 16): Receiver 4 Inverting Input and Driver 4
Output.
R3 B (Pin 17): Receiver 3 Noninverting Input.
R3 A (Pin 18): Receiver 3 Inverting Input.
R2 B (Pin 19): Receiver 2 Noninverting Input.
R2 A (Pin 20): Receiver 2 Inverting Input.
D3/R1 B (Pin 21): Receiver 1 Noninverting Input and
Driver 3 Noninverting Output.
D3/R1 A (Pin 22): Receiver 1 Inverting Input and Driver 3
Inverting Output.
D2 B (Pin 23): Driver 2 Noninverting Output.
D2 A (Pin 24): Driver 2 Inverting Output.
D1 B (Pin 25): Driver 1 Noninverting Output.
D1 A (Pin 26): Driver 1 Inverting Output.
GND (Pin 27): Ground.
V
26 on LTC1543 or to – 8V supply. Connect a 1 F capacitor
to ground.
EE
(Pin 28): Negative Supply Voltage. Connect to V
CC
Figure 2. V.11 Driver/Receiver AC Test Circuit
.
B
A
R
100
L
C
100pF
C
100pF
L
L
B
A
LTC1544
R
15pF
1544 F02
EE
5
Pin