The SP319 is a single-chip, +5V-only serial transceiver from Sipex that supports the signals needed for a full V.35 interface. It provides 3 drivers and 3 receivers for V.35 clock and data signals, and 4 drivers and 4 receivers for RS-232 (V.28) control line signals. A Sipex patented charge pump allows +5V-only low power operation, and no external V.35 termination resistors are required. The device is supplied in 80-pin MQFP surface mount packaging and is pin compatible with the SP320.
The datasheet gives absolute maximum ratings, electrical specifications for the V.35 and RS-232 drivers and receivers, timing test circuits and package dimensions. A theory of operation section describes the V.35 drivers and receivers, the RS-232 drivers and receivers, and the four-phase charge pump, which uses four external capacitors to produce a symmetrical ±10V supply. V.35 drivers and receivers operate up to 10Mbps and the RS-232 drivers and receivers are specified to 120kbps.
| V.35 Drivers/Receivers | 3 drivers, 3 receivers |
|---|---|
| RS-232 (V.28) Drivers/Receivers | 4 drivers, 4 receivers |
| Supply | +5V-only, single supply |
| Maximum V.35 Data Rate | 10 Mbps |
| Maximum RS-232 Data Rate | 120 kbps |
| V.35 Receiver Sensitivity | ±300 mV |
| Charge Pump Output | Symmetrical ±10V |
| Package | 80-pin MQFP |
| Pin Compatibility | Pin compatible with SP320 |
All V.35 drivers and receivers operate up to 10Mbps.
No. The datasheet states that no external V.35 termination resistors are required, and termination can also be disabled.
It operates from a single +5V supply using a Sipex patented charge pump.
It is offered in 80-pin MQFP surface mount packaging.