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SP505_00_08308

The SP505 is a monolithic device that supports eight (8) popular serial interface standards for DTE

to DCE connectivity. The SP505 is fabricated using a low power BiCMOS process technology, and

incorporates a Sipex patented (5,306,954) charge pump allowing +5V only operation. Seven (7)

drivers and seven (7) receivers can be configured via software for any of the above interface modes

at any time. The SP505 requires no additional external components for compliant operation for all

of the eight (8) modes of operation. All necessary termination is integrated within the SP505 and is

switchable when V.35 drivers, V.35 receivers, and V. receivers are used. The SP505 can operate

as either a DTE or DCE.

Additional features with the SP505 include internal loopback that can be initiated in either single-ended

or differential modes. While in loopback mode, driver outputs are internally connected to receiver

inputs creating an internal signal path convenient for diagnostic testing. This eliminates the need for

an external loopback plug. The SP505 also includes a latch enable pin with the driver and receiver

address decoder. Tri-state ability for the driver and receiver outputs is controlled by supplying a 4-bit

word into the address decoder. Seven (7) drivers and one () receiver in the SP505 include separate

enable pins for added convenience. The SP505 is ideal for WAN serial ports in networking equipment

such as routers, switches, DSU/CSU's, and other access devices.

SP505

WAN Multi-Mode Serial Transceiver

DESCRIPTION

• +5V Only Operation

• Seven (7) Drivers and Seven (7) Receivers

• Driver and Receiver Tri-state Control

• Internal Transceiver Termination Resistors for

V. and V.35 Protocols

• Loopback Self-Test Mode

• Software Selectable Protocol Selection

• Interface Modes Supported:

• Improved ESD Tolerance for Analog I/Os

• High Differential Transmission Rates

• Compliant to NET/2 and TBR2 Physical Layer

Requirements

(TUV Test Report NET2/0520/98)

(TUV Test Report CTR2/0520/98)

EIA-530

WAN

V.35

RxD 1

SDEN2

TREN3

RSEN4

LLEN 5

TTEN 6

SCTEN7

LATCH 8

DEC

DEC

DEC

DEC

DTR 13

TxD 14

TxC 15

RTS 16

RL 17

RLEN 18

DCD 19

RxC 20

60 GND

59 SD(b)

58 TR(a)

57 GND

56 TR(b)

55 VCC

54 RS(a)

53 GND

52 RS(b)

51 LL(a)

50 GND

49 LL(b)

48 VCC

47 RL(a)

46 GND

45 RL(b)

44 ST(b)

43 GND

42 ST(a)

41 VCC

SP505