VCC (Pins 1, 19/Pins 17, 36): Positive Supply for the
鍙冩暩(sh霉)璩囨枡
鍨嬭櫉锛� LTC2845CUHF#TR
寤犲晢锛� Linear Technology
鏂囦欢闋佹暩(sh霉)锛� 17/20闋�
鏂囦欢澶�?銆�?/td> 0K
鎻忚堪锛� IC TXRX 3.3V MULTIPROTOCOL 38QFN
妯欐簴鍖呰锛� 2,500
椤炲瀷锛� 鏀剁櫦(f膩)鍣�
椹呭嫊鍣�/鎺ユ敹鍣ㄦ暩(sh霉)锛� 5/5
瑕�(gu墨)绋嬶細 澶氬崝(xi茅)璀�
闆绘簮闆诲锛� 3.3V
瀹夎椤炲瀷锛� 琛ㄩ潰璨艰
灏佽/澶栨锛� 38-WFQFN 瑁搁湶鐒婄洡
渚涙噳鍟嗚ō鍌欏皝瑁濓細 38-QFN锛�5x7锛�
鍖呰锛� 甯跺嵎 (TR)
6
LTC2845
sn2845 2845fs
VCC (Pins 1, 19/Pins 17, 36): Positive Supply for the
Transceivers. Connect to VCC Pin 8 on LTC2846 or to 5V
supply. Connect a 1
F capacitor to ground.
VDD (Pin 2/Pin 37): Positive Supply Voltage for V.28.
Connect to VDD Pin 7 on LTC2846 or 8V supply. Connect
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 VIN when high impedance.
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 VIN.
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 VIN.
R4EN (Pin 16/Pin 14): TTL Level Enable Input. Logic high
enables Receiver 4. Pulls up to VIN.
R5 (Pin 17/Pin 15): CMOS Level Receiver 5 Output.
PIN FUNCTIONS
UU
U
D5 (Pin 18/Pin 16): TTL Level Driver 5 Input.
VIN (Pin 20/Pin 18): Positive Supply for the Receiver
Outputs. 3V
鈮� VIN 鈮� 3.6V. Connect a 1F capacitor to
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.
VEE (Pin 36/Pins 34, 35): Negative Supply Voltage. Con-
nect to VEE Pin 31 on LTC2846 or to 鈥�7V supply. Connect
a 1
F capacitor to ground.
EXPOSED Pad VEE (Pin 39): Must be Soldered to PCB.
(G-36/QFN-38 Packages)
鐩搁棞PDF璩囨枡
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鐩搁棞浠g悊鍟�/鎶€琛撳弮鏁�(sh霉)
鍙冩暩(sh霉)鎻忚堪
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