Toshiba B-EV4 Series Manual page 17

2. ELECTRONICS SPECIFICATIONS
DC/DC Converter (U22, 23):
Eternet Transceiver (U8):
Regulator (U24, U33):
Stepping Motor Driver (U18, U19): Type: PBL3717
Serial Interface Controller (U12):
Reset detect circuit (U25):
Type: TS34063
It generates the voltages (+5V, +3.3V) from the power supply voltage
(AC adapter).
+5V and +3.3V are used as the operating voltage for each circuit.
Type: DM9161
This IC is used for controlling the Ethernet (10BASET/10BASETX).
Type: TS68N28CX5, TS9007DCX
It generates the voltages (+1.8) from the DC/DC converter voltage
(+3.3V).
This IC is used for controlling the Stepping Motor.
Type: SP3232ECY
This IC is used for controlling the Serial Interface (RS-232C).
Type: TS358
This IC is single supply dual operation amplifiers.
It detects the voltage depression from +24V and +3.3V and outputs the
Power Down signal to the CPU.
2-4
EO18-33025
2.3 Description of the Main PC Board