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PDF MSM6927 Data sheet ( Hoja de datos )
| Número de pieza | MSM6927 | |
| Descripción | (MSM6927 / MSM6947) 1200 bps Single Chip FSK MODEM | |
| Fabricantes | OKI Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MSM6927 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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E2A0011-16-X1
¡ Semiconmductor¡ Semiconductor
This versMioSnM: 6Ja9n2.71/9699847
Previous version: Nov. 1996
MSM6927t4/U6.c9o 471200 bps Single Chip FSK MODEM
SheeGENERAL DESCRIPTION
ataThe MSM6927 and the MSM6947 are OKI's 1200 bps single chip modem series which transmit
.Dand receive serial, binary data over a switched telephone network using frequency shift
keying(FSK).
ww mThe MSM6927 is compatible with ITU-T V.23 series data sets, while the MSM6947 is compatible
with Bell 202 series data sets.
w oThese devices provide all the necessary modulation, demodulation, and filtering required to
.cimplement a serial, asynchronous communication link.
OKI's single chip modem series is designed for users who are not telecommunication experts and
are easy to use cost effective alternative to standard discrete modem design.
UCMOS LSI technology provides the advantages of small size, low power, and increased
reliability.
t4The design of the integrated circuit assures compatibility with a broad base of installed low speed
modems and acoustic couplers. Applications include interactive terminals, desk top computers,
point of sale equipment, and credit verification systems.
eeFEATURES
h• Compatible with ITU-T V.23 (MSM6927)
S• Compatible with BELL 202 (MSM6947)
ta• CMOS silicon gate process
• Switched capacitor and advanced CMOS analog technology
• Data rate from 0 to 1200 bps
a• Half duplex (2-Wire)
• Receive squelch delay
.D• Selectable built-in timers and external delay timers possible
• All filtering, modulation, demodulation, and DTE interface on chip
• Crystal controlled oscillator on chip
w• TTL compatible digital interface
m• Low power dissipation: 90 mW Typ.
w o• Package options:
.c28-pin plastic DIP
(DIP28-P-600–2.54)
(Product name: MSM6927RS)
w U(Product name: MSM6947RS)
t444-pin plastic QFP (QFP44-P-910-0.80–K) (Product name: MSM6927GS-K)
e(Product name: MSM6947GS-K)
www.DataShe(QFP44-P-910-0.80–2K) (Product name: MSM6927GS-2K)
1/31
1 page  
¡ Semiconductor
PIN DESCRIPTIONS
Power
Name
DG
AG
VA
VD
Pin No.
I/O
RS GS-K
15 19 —
19 23 —
24 33 —
26 35 —
Description
Ground reference of VD (digital ground)
Ground reference of VA (digital ground)
Supply voltage (+12 V nominal)
Supply voltage (+5 V nominal)
MSM6927/6947
Clocks
Name
X1
X2
CLK
Pin No.
I/O
RS GS-K
Description
1 41 — Master clock timing is provided by either a series resonant crystal (3.579545 MHz
±0.01%) connected across X1 and X2, or by an external TTL/CMOS clock driving
2
42
—
X2 with AC coupling. In this latter case, X1 is left unconnected.
See Fig. 10.
3 43 O 873.9 Hz clock output. This clock is used to implement external delay circuits etc.
5/31
5 Page 
¡ Semiconductor
MSM6927/6947
ELECTRICAL CHARACTERISTICS
DC and Digital Interface Characteristics
(VA = 12 V ±10%, VD = 5 V ±5%, Ta = 0 to 70°C)
Parameter
Symbol
Condition
Min. Typ. Max. Unit
Power Supply Current
Input Leakage Currnet
Input Voltage
Output Voltage
IA
ID
IIL
*1
IIH
*1 VIL
VIH
*2 VOL
VOH
Ordinary
operation
VI = 0 V
VI = VD
—
—
IOL = 1.6 mA
IOH = 400 mA
—
—
–10
–10
0
2.2
0
0.8 ¥ VD
7.5
1.0
—
—
—
—
—
—
15.0
mA
2.0
10
mA
10
0.8
VD V
0.4
VD
*3
*1 LT, CC, RS1, RS2, XD, CD2, RD2, SQ, FT, TS1 (TS), TS2 (ATE)
*3
*2 CLK, CS, RD, CD1, CD2, RD1
*3 CD2 is I/O terminal.
11/31
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MSM6927.PDF ] | |
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