ltc2845 Linear Technology Corporation, ltc2845 Datasheet - Page 6

• Manufacturer Part Number: ltc2845
• Description: 3.3v Software-selectable Mutiprotocol Transceiver
• Manufacturer: Linear Technology Corporation

PIN
LTC2845
V
Transceivers. Connect to V
supply. Connect a 1 F capacitor to ground.
V
Connect to V
a 1 F capacitor to ground.
D1 (Pin 3/Pin 38): TTL Level Driver 1 Input.
D2 (Pin 4/Pin 1): TTL Level Driver 2 Input.
D3 (Pin 5/Pin 2): TTL Level Driver 3 Input.
R1 (Pin 6/Pin 3): CMOS Level Receiver 1 Output. Receiver
outputs have a weak pull up to V
R2 (Pin 7/Pin 4): CMOS Level Receiver 2 Output.
R3 (Pin 8/Pin 5): CMOS Level Receiver 3 Output.
D4 (Pin 9/Pin 6): TTL Level Driver 4 Input.
R4 (Pin 10/Pin 7): CMOS Level Receiver 4 Output.
M0 (Pin 11/Pin 8): TTL Level Mode Select Input 0. Mode
select inputs pull up to V
M1 (Pin 12/Pin 9): TTL Level Mode Select Input 1.
M2 (Pin 13/Pin 10): TTL Level Mode Select Input 2.
DCE/DTE (Pin 14/Pin 12): TTL Level Mode Select Input.
Logic high enables Driver 3. Logic low enables Receiver 1.
D4ENB (Pin 15/Pin 13): TTL Level Enable Input. Logic low
enables Driver 4. Pulls up to V
R4EN (Pin 16/Pin 14): TTL Level Enable Input. Logic high
enables Receiver 4. Pulls up to V
R5 (Pin 17/Pin 15): CMOS Level Receiver 5 Output.
6
CC
DD
U
(Pins 1, 19/Pins 17, 36): Positive Supply for the
(Pin 2/Pin 37): Positive Supply Voltage for V.28.
FUNCTIONS
U
DD
Pin 7 on LTC2846 or 8V supply. Connect
U
IN
.
CC
(G-36/QFN-38 Packages)
Pin 8 on LTC2846 or to 5V
IN
IN
.
IN
when high impedance.
.
D5 (Pin 18/Pin 16): TTL Level Driver 5 Input.
V
Outputs. 3V
ground.
D5 A (Pin 21/Pin 19): Driver 5 Inverting Output.
R5 A (Pin 22/Pin 20): Receiver 5 Inverting Input.
R4 A (Pin 23/Pin 21): Receiver 4 Inverting Input.
D4 A (Pin 24/Pin 22): Driver 4 Inverting Input.
R3 B (Pin 25/Pin 23): Receiver 3 Noninverting Input.
R3 A (Pin 26/Pin 24): Receiver 3 Inverting Input.
R2 B (Pin 27/Pin 25): Receiver 2 Noninverting Input.
R2 A (Pin 28/Pin 26): Receiver 2 Inverting Input.
D3/R1 B (Pin 29/Pin 27): Receiver 1 Noninverting Input
and Driver 3 Noninverting Output.
D3/R1 A (Pin 30/Pin 28): Receiver 1 Inverting Input and
Driver 3 Inverting Output.
D2 B (Pin 31/Pin 29): Driver 2 Noninverting Output.
D2 A (Pin 32/Pin 30): Driver 2 Inverting Output.
D1 B (Pin 33/Pin 31): Driver 1 Noninverting Output.
D1 A (Pin 34/Pin 32): Driver 1 Inverting Output.
GND (Pin 35/Pin 33): Ground.
V
nect to V
a 1 F capacitor to ground.
EXPOSED Pad V
IN
EE
(Pin 36/Pins 34, 35): Negative Supply Voltage. Con-
(Pin 20/Pin 18): Positive Supply for the Receiver
EE
Pin 31 on LTC2846 or to –7V supply. Connect
V
EE
IN
(Pin 39): Must be Soldered to PCB.
3.6V. Connect a 1 F capacitor to
sn2845 2845fs