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SP505AB Datasheet, PDF (17/36 Pages) Sipex Corporation – WAN Multi-Mode Serial Transceiver | |||
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Pin 45 â RL(b) â Remote Loopback; analog
output, non-inverted; sourced from RL.
Pin 47 â RL(a) â Remote Loopback; analog
output inverted; sourced from RL.
Pin 49â LL(b) â Local Loopback; analog
output, non-inverted; sourced from LL.
Pin 51 â LL(a) â Local Loopback; analog
output, inverted; sourced from LL.
Pin 52 â RS(b) â Ready To Send; analog
output, non-inverted; sourced from RTS.
Pin 54 â RS(a) â Ready To Send; analog
output, inverted; sourced from RTS.
Pin 56 â TR(b) â Terminal Ready; analog
output, non-inverted; sourced from DTR.
Pin 58 â TR(a) â Terminal Ready; analog
output, inverted; sourced from DTR.
Pin 66 â CS(a)â Clear To Send; analog input,
inverted; source for CTS.
Pin 67 â CS(b)â Clear To Send; analog input,
non-inverted; source for CTS.
Pin 68 â DM(a)â Data Mode; analog input,
inverted; source for DSR.
Pin 69 â DM(b)â Data Mode; analog input,
non-inverted; source for DSR
Pin 78 â DSRâ Data Set Ready; TTL output;
sourced from DM(a), DM(b) inputs.
Pin 80 â CTSâ Clear To Send; TTL output;
sourced from CS(a) and CS(b) inputs.
Pin 7 â SCTEN â Enables SCT receiver;
active high; TTL input.
Pin 8 â LATCH â Latch control for decoder
bits (pins 9-12), active low. Logic high input
will make decoder transparent.
Pins 12â9 â DEC0 â DEC3 â Transmitter and
receiver decode register; configures transmitter
and receiver modes; TTL inputs.
Pin 18 â RLEN â Enables RL driver; active
low; TTL input.
Pin 23 â STEN â Enables ST driver; active
low; TTL input.
POWER SUPPLIES
Pins 25, 33, 41, 48, 55, 62, 73, 74 â VCC â +5V
input.
Pins 29, 34, 43, 46, 50, 53, 57, 60, 64, 72, 75 â
GND â Ground.
Pin 27 â VDD +10V Charge Pump Capacitor â
Connects from VDD to VCC. Suggested capaci-
tor size is 22µF, 16V.
Pin 32 â VSS â10V Charge Pump Capacitor â
Connects from ground to VSS. Suggested ca-
pacitor size is 22µF, 16V.
Pins 26 and 30 â C1+ and C1â
Capacitor â Connects from
â Charge
C1+ to C1â.
Pump
Sug-
gested capacitor size is 22µF, 16V.
Pins 28 and 31 â C2+ and C2â
Capacitor â Connects from
â Charge
C2+ to C2â.
Pump
Sug-
gested capacitor size is 22µF, 16V.
CONTROL REGISTERS
Pins 2 â SDEN â Enables TxD driver, active
low; TTL input.
Pins 3 â TREN â Enables DTR driver, active
low; TTL input.
Pins 4 â RSEN â Enables RTS driver, active
low; TTL input.
Pins 5 â LLEN â Enables LL driver, active
low; TTL input.
Pin 6 â TTEN â Enables TT driver, active
low; TTL input.
Rev. 7/9/03
SP505 MultiâMode Serial Transceiver
17
© Copyright 2003 Sipex Corporation
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