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PDF ( 数据手册 , 数据表 ) M-8888

零件编号 M-8888
描述 DTMF Transceiver
制造商 Clare Inc.
LOGO Clare  Inc. LOGO 


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M-8888 数据手册, 描述, 功能
Features
· Advanced CMOS technology for low power con-
sumption and increased noise immunity
· Complete DTMF transmitter/receiver in a single
chip
Standard 8051, 8086/8 microprocessor port
· Central office quality and performance
· Adjustable guard time
· Automatic tone burst mode
· Call progress mode
· Single +5 Volt power supply
· 20-pin DIP and SOIC packages
· 2 MHz microprocessor port operation
·· Inexpensive 3.58 MHz crystal
Applications
Paging systems
· Repeater systems/mobile radio
· Interconnect dialers
· PBX systems
· Computer systems
· Fax machines
· Pay telephone
·· Credit card verification
M-8888
DTMF Transceiver
Description
The M-8888 is a complete DTMF Transmitter
Receiver that features adjustable guard time, auto-
matic tone burst mode, call progress mode, and a fully
compatible 8051, 8086/8 microprocessor interface.
The receiver portion is based on the industry standard
M-8870 DTMF Receiver, while the transmitter uses a
switched-capacitor digital-to-analog converter for low-
distortion, highly accurate DTMF signaling. Tone
bursts can be transmitted with precise timing by mak-
ing use of the automatic tone burst mode. To analyze
call progress tones, a call progress filter can be select-
ed by an external microprocessor.
Ordering Information
Part #
Description
M-8888-01P
20-pin plastic DIP
M-8888-01SM 20-pin plastic SOIC
M-8888-01T
20-pin plastic SOIC,Tape and Reel
Pin Connections
Block Diagram
DS-M8888-R1
www.clare.com
1







M-8888 pdf, 数据表
M-8888
Absolute Maximum Ratings
Parameter Symbol
Value
Power supply voltage
(VDD - VSS)
VDD
+ 6.0 V max
Voltage on any pin Vdc VSS -0.3 V to VDD + 0.3V
Current on any pin
IDD
10 mA max
Operating temperature TA
-40°C to +85°C
Storage temperature
TS
-65°C to +150°C
Note: Exceeding these ratings may cause permanent damage. Functional operation under these
conditions is not implied.
Absolute Maximum Ratings are stress ratings. Stresses in
excess of these ratings can cause permanent damage to
the device. Functional operation of the device at these or
any other conditions beyond those indicated in the opera-
tional sections of this data sheet is not implied. Exposure of
the device to the absolute maximum ratings for an extend-
ed period may degrade the device and effect its reliability.
DC Characteristics
Parameter
Symbol
Min
Typ*
Operating supply voltage
Operating supply current
Power consumption
Inputs
VDD 4.75
IDD -
PO -
5.0
10
50
High-level input voltage, OSC1
Low-level input voltage, OSC1
Input impedance (@ 1 KHz), IN+, IN-
Steering threshold voltage
Outputs
VIHO 3.5
VILO -
RIN -
VTSt 2.2
-
-
10
2.3
High-level output voltage (no load), OSC2
Low-level output voltage (no load), OSC2
Output leakage current (VOH = 2.4V), IRQ
VREF output voltage (no load)
VREF output resistance
Data Bus
VOHO
VOLO
IOZ
VREF
ROR
VDD - 0.1V
-
-
2.4
-
-
-
1.0
-
-
Low-level input voltage
High-level input voltage
Low-level output voltage (IOL = 1.6 mA)
High-level output voltage (IOH = 400 µA)
Input leakage current (VIN = 0.4 to 2.4 V)
VIL
VIH
VOL
VOH
IIZ
-
2.0
-
2.4
-
-
-
-
-
-
All voltages referenced to VSS unless otherwise noted. VDD = 5.0 V ± 5%; fC = 3.579545 MHz; TA = -40°C to +85°C unless otherwise noted.
*Typical values are for use as design aids only, and are not guaranteed or subject to production testing.
Max
5.25
15
78.75
-
1.5
-
2.5
-
0.1
10.0
2.7
1.0
0.8
-
0.4
-
10.0
Units
V
mA
mW
V
V
M
V
V
V
µA
V
k
V
V
V
V
µA
8
www.clare.com
Rev. 1














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