MX909A データシートの表示（PDF） - MX-COM Inc
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MX909A Datasheet PDF : 38 Pages
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GMSK Modem Data Pump
Page 33 of 37
MX909A PRELIMINARY INFORMATION
6.1.3 Operating Characteristics
For the following conditions unless otherwise specified:
Xtal Frequency = 4.096MHz, Bit Rate = 8k bits/sec, Noise Bandwidth = Bit Rate,
VDD = 5.0V @ TAMB = 25°C
DC Parameters
IDD (not powersaved) (VDD = 3.3V)
IDD (powersaved) (VDD = 3.3V)
IDD (not powersaved)
IDD (powersaved)
AC Parameters
Tx Output
TXOUT Impedance (not powersaved)
TXOUT Impedance (powersaved)
Signal Level
Tx Data Delay
Rx Input
RXIN Impedance (at 100Hz)
RXIN Amp Voltage Gain (input = 1mVRMS at 100Hz)
Input Signal Level
Rx Data Delay
Xtal/Clock Input
'High' Pulse Width
'Low' Pulse Width
Input Impedance (at 100Hz)
Gain (input = 1 mVRMS at 100Hz)
µC Interface
Input Logic "1" Level
Input Logic "0" Level
Input Leakage Current (VIN = 0 to VDD)
Input Capacitance
Output Logic "1" Level (lOH = 120µA)
Output Logic "0" Level (lOL = 360µA)
'Off' State Leakage Current (VOUT = VDD)
Notes
1
1
1
1
2
2
3
4
5
6
7
7
8, 9
8, 9
8, 9
8, 9
9
9,10
10
Min.
0.9
10.0
0.7
40
40
10.0
20
70%
5.0
90%
Typ. Max.
2.2 3.3
0.4 0.6
3
4.5
0.9 1.4
1.0 2.5
300
1.0 1.1
4
6
500
1.0 1.3
3.5
30%
5.0
10.0
10%
10
Units
mA
mA
mA
mA
kΩ
kΩ
VP-P
bits
MΩ
V/V
VP-P
bits
ns
ns
MΩ
dB
VDD
VDD
µA
pF
VDD
VDD
µA
6.1.3.1 Operating Characteristics Notes:
1. Not including any current drawn from the modem pins by external circuitry.
2. Small signal impedance
3. For "1111000011110000..." bit sequence (output level is proportional to VDD).
4. Measured between issuing first task after idle and the center of the first bit at TXOUT see Figure 7)
5. For optimum performance, measured at RXAMPOUT pin, for a "...11110000..." bit sequence
6. Measured between center of last bit of an Rx single byte or Frame Sync at RXIN and an IRQ
the host µC.
interrupt to
7. Timing for an external input to the CLOCK/XTAL pin.
8. WR , RD , CS , A0 and A1 pins.
9. D0 - D7 pins.
10. IRQ pin.
¤2001 MX-COM, Inc.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480134.005
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.
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