SP504MCM View Datasheet(PDF) - Exar Corporation

Part Name

Description

Manufacturer

SP504MCM

WAN Multi-Mode Serial Transceiver

Exar Corporation 

Pin 40 — IC(b)— Incoming Call; analog

input,non-inverted; source for RI.

Pin 45 — RL(b) — Remote Loopback; analog

output, non-inverted; sourced from RL.

Pin 47 — RL(a) — Remote Loopback; analog

output inverted; sourced from RL.

Pin 49— LL(b) — Local Loopback; analog

output, non-inverted; sourced from LL.

Pin 51 — LL(a) — Local Loopback; analog

output, inverted; sourced from LL.

Pin 52 — RS(b) — Ready To Send; analog

output, non-inverted; sourced from RTS.

Pin 54 — RS(a) — Ready To Send; analog

output, inverted; sourced from RTS.

Pin 56 — TR(b) — Terminal Ready; analog

output, non-inverted; sourced from DTR.

Pin 58 — TR(a) — Terminal Ready; analog

output, inverted; sourced from DTR.

Pin 66 — CS(a)— Clear To Send; analog

input, inverted; source for CTS.

Pin 67 — CS(b)— Clear To Send; analog

input, non-inverted; source for CTS.

Pin 68 — DM(a)— Data Mode; analog input,

inverted; source for DSR.

Pin 69 — DM(b)— Data Mode; analog input,

non-inverted; source for DSR

Pin 78 — DSR— Data Set Ready; TTL output;

sourced from DM(a), DM(b) inputs.

Pin 80 — CTS— Clear To Send; TTL output;

sourced from CS(a) and CS(b) inputs.

Pins 12–9 — TDEC0 – TDEC3 — Transmit-

ter decode register; configures transmitter

modes; TTL inputs.

Pin 23 — STEN — Enables ST driver; active

low; TTL input.

POWER SUPPLIES

Pins 25, 33, 41, 48, 55, 62, 73, 74 — VCC

— +5V input.

Pins 29, 34, 43, 46, 50, 53, 57, 60, 64, 72,

75 — GND — Ground.

Pin 27 — VDD +10V Charge Pump Capacitor

— Connects from VDD to VCC. Suggested

capacitor size is 22µF, 16V.

Pin 32 — VSS –10V Charge Pump Capacitor

— Connects from ground to VSS. Suggested

capacitor size is 22µF, 16V.

Pins 26 and 30

Pump Capacitor

—

—

CCo1+nnaencdtsCfr1o– m—C1C+ thoaCrg1–e.

Suggested capacitor size is 22µF, 16V.

Pins 28 and 31

Pump Capacitor

—

—

CCo2+nnaencdtsCfr2o– m—C2C+ thoaCrg2–e.

Suggested capacitor size is 22µF, 16V.

NOTE: NC pins should be left floating; in-

ternal signals may be present.

CONTROL REGISTERS

Pins 2–5 — RDEC0 – RDEC3 — Receiver

decode register; configures receiver modes;

TTL inputs.

Pin 6 — TTEN — Enables TT driver, active

low; TTL input.

Pin 7 — SCTEN — Enables SCT receiver;

active high; TTL input.

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com

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SP504_102_121708

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