fx604 Consumer Microcircuits Limited, fx604 Datasheet - Page 15

• Manufacturer Part Number: fx604
• Description: V23 Compatible Modem
• Manufacturer: Consumer Microcircuits Limited

V.23 Compatible Modem
Data and Mode Timing
Input Amplifier
XTAL/CLOCK Input
Notes:
1996 Consumer Microcircuits Limited
Rx Data Delay (RXIN to RXD)
Tx Data Delay (TXD to TXOP)
Mode ZP to Tx or Rx
Mode Tx1200 to Rx1200
Mode Rx1200 to Tx1200
Impedance (RXIN Pin)
Voltage Gain
'High' Pulse Width
'Low' Pulse Width
1. At 25 C, not including any current drawn from the FX604 pins by external circuitry other than
2. TXD, RXEQ and CLK inputs at V
3. Measured at the Rx Input Amplifier output (pin RXFB) for 1300Hz and V
4. Flat noise in 300-3400Hz band.
5. Relative to 775mVrms at V
6. Open loop, small signal low frequency measurements.
7. Timing for an external input to the XTAL/CLOCK pin.
8. Assuming data retiming is not enabled.
9. Delay from mode change to reliable data at TXOP or RXD pins.
X1, C1 and C2.
The internal threshold levels are proportional to V
different signal level ranges the voltage gain of the Rx Input Amplifier should be adjusted by
selecting the appropriate external components as described in section 1.6.1
DD
= 5.0V for load resistances greater than 40k .
SS
, M0 and M1 inputs at V
15
Notes
8
8
9
9
9
6
6
7
7
DD
10.0
Min.
100
100
-
-
-
-
-
-
. To cater for other supply voltages or
DD
Typ.
2.55
.
500
0.1
-
-
-
-
-
-
DD
Max.
4.0
0.2
20
= 5.0V.
-
-
-
-
-
-
Units
D/604/3
M
V/V
ms
ms
ms
ms
ms
FX604
ns
ns