CH224ATF Ver la hoja de datos (PDF) - Cermetek Microelectronics
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Fabricante
CH224ATF Datasheet PDF : 13 Pages
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Cermetek Microelectronics, Inc.
CH224ATF Complete 2400 bps Modem Module
GND
DCDIND
RXIND
DTRIND
SPKR
TXIND
GND
OG
OG
OG
O(DF)
OG
Table 9. Signal Designations (Continuation).
Ground
LED drivers are open-drain inverter-driven (74HCT05) lines with 1.5K ½,
1/10W pull-up resistors on-board.
DCD LED indicator. Active high DCD status.
RXD LED indicator. Active high RXD status.
DTR LED indicator. Active high DTR status.
Speaker Analog Output. The SPKR output reflects the received analog input
signal. The SPKR is controlled by the ATMn command.
SKR is tied directly to SPKR pin of the data pump.
TXD LED indicator. Active high TXD status.
Parameter
Input High Voltage
Type IA
Type IC
Type IH
Input Low Voltage
Type IA and IC
Input Low Voltage
Type IF
Input Leakage Current
IA and IC
Output High Voltage
Type OA
Type OD
Type OG
Table 10. Digital Interface Characteristics
Symbol
Min.
Typ.
Max.
VIH
2.0
-
VCC
3.5
-
VCC
-30
-
30
VIL
-0.3
-
0.8
VIL
-
38
-
IIN
+10
-
-
VOH
2.4
-
-
-
-
VCC
-
-
VCC
Output Low Voltage
VOL
Type OA
Type OB
Type OD
Type OG
Three –State (Off)
ITS
+25
Current
Notes:
1. Test Conditions: VCC = 5V + 5%, TA = 0°C to 70°C (unless otherwise stated.)
Output loads: 50 pF + one TTL.
2. AC Vrms voltage between Tip and Ring, using the on-boatd modular DAA.
SPKR
Name
O (DF)
Table 11. Analog Characteristics
Type
Characteristic
Minimum Load
Maximum Capacitive
Load
Output Impedance
Output Voltage
D.C Offset
Units
Vdc
Vdc
Vrms
µAdc
Vdc
Vdc
µAdc
Test Conditions
Note 2
VIN=0 to VCC
ILOAD = 100µA
ILOAD = 0 mA
ILOAD = 0 mA
ILOAD = 1.6 mA
ILOAD = 0.8 mA
ILOAD = 15 mA
ILOAD = 8 mA
VIN=0.8 V to 4.5V
Value
300Ω
0.01µF
10Ω
2.5 + 1.6V
< 20 mV
2001 Cermetek Microelectronics, Inc.
Page 9
Document No. 607-0005 Revision B1 (05/02)
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