E2U0010-28-81
¡ Semiconductor
MSM6996H/6996V/6997H/6997V/6998/6999
¡ Semiconductor
Single Chip CODEC
This version: Aug. 1998
MSM6996H/6996V/6997H/6997V/6998/6999
Previous version: Nov. 1996
GENERAL DESCRIPTION
The MSM6996H/MSM6996V/MSM6997H/MSM6997V/MSM6998/MSM6999 are a single-channel
CODEC CMOS ICs containing filters for A/D and D/A converting of the voice signal ranging from
300 Hz to 3400 Hz.
FEATURES
• Compliance with ITU-T companding Law
MSM6996H/MSM6996V/MSM6998 :
A-law
MSM6997H/MSM6997V/MSM6999 :
m-law
• Capable of independent operation of transmission and reception
• Transmission clock in the range of 64 kHz to 2048 kHz
• Adjustable transmit gain
• 600
W
drive for analog output
MSM6996H/MSM6996V/MSM6997H/MSM6997V single end drive
MSM6998/MSM6999 Push-pull drive
• Built-in analog loop back fanction
MSM6996V/MSM6997V
• Built-in reference voltage source
• Low Power Dissipation (60 mW to 70 mW Typ.)
• Package options :
16-pin plastic DIP (DIP16-P-300-2.54) (Product name : MSM6996HRS/MSM6997HRS)
(Product name : MSM6996VRS/MSM6997VRS)
(Product name : MSM6998RS/MSM6999RS)
16-pin cer DIP (DIP16-G-300-2.54-1)
(Product name : MSM6996HAS/MSM6997HAS)
(Product name : MSM6996VAS/MSM6997VAS)
(Product name : MSM6998AS/MSM6999AS)
24-pin plastic SOP (SOP24-P-430-1.27-K) (Product name : MSM6996HGS-K/MSM6997HGS-K)
(Product name : MSM6996VGS-K/MSM6997VGS-K)
(Product name : MSM6998GS-K/MSM6999GS-K)
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¡ Semiconductor
MSM6996H/6996V/6997H/6997V/6998/6999
BLOCK DIAGRAM
MSM6996H/V
MSM6997H/V
AIN+
AIN–
GSX
V
DD
V
SS
AG
DG
*2
TMC
+
–
SAMPLE
Pre Filter
5th
LPF
3rd
HPF
Auto
Zero
Voltage
REF.
COMP
Transmit
PLL
XSYNC
C Ladder
SAR
Transmit
Controller
XCLOCK
PCMOUT
*1
PDN/BS
PCMIN
RCLOCK
RSYNC
T.PWD
R.PWD
C Ladder
–
+
Receive
Controller
Receive
PLL
AOUT
5th
LPF
*
1 BS : Only MSM6997H/V
*
2 Only MSM6996V, MSM6997V
MSM6998, MSM6999
AIN+
AIN–
GSX
V
DD
V
SS
AG
DG
AOUT–
+
–
+
–
SAMPLE
5th
LPF
3rd
HPF
Auto
Zero
Pre Filter
COMP
Transmit
PLL
XSYNC
Voltage
REF.
C Ladder
SAR
Transmit
Controller
XCLOCK
PCMOUT
*3
PDN/BS
PCMIN
RCLOCK
RSYNC
T.PWD
R.PWD
R
5th
LPF
C Ladder
R
AOUT+
–
+
Receive
Controller
Receive
PLL
*
3 BS : Only MSM6999
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¡ Semiconductor
MSM6996H/6996V/6997H/6997V/6998/6999
PIN CONFIGURATION (TOP VIEW)
AIN+ 1
AIN– 2
GSX 3
AG 4
AOUT 5
NC 6
V
DD
7
PCMIN 8
16 V
SS
15 PCMOUT
14 PDN/BS
13 DG
12 XSYNC
11 RSYNC
10 XCLOCK
AIN+ 1
AIN– 2
GSX 3
AG 4
AOUT 5
TMC 6
V
DD
7
16 V
SS
15 PCMOUT
14 PDN/BS
13 DG
12 XSYNC
11 RSYNC
10 XCLOCK
AIN+ 1
AIN– 2
GSX 3
AG 4
AOUT+ 5
AOUT– 6
V
DD
7
16 V
SS
15 PCMOUT
14 PDN/BS
13 DG
12 XSYNC
11 RSYNC
10 XCLOCK
9 RCLOCK
9 RCLOCK PCMIN 8
9 RCLOCK PCMIN 8
NC : No connect pin
16-Pin Plastic DIP
MSM6996HRS
MSM6997HRS
16-Pin Plastic DIP
MSM6996VRS
MSM6997VRS
16-Pin Plastic DIP
MSM6998RS
MSM6999RS
AIN+ 1
AIN– 2
GSX 3
AG 4
AOUT 5
NC 6
V
DD
7
PCMIN 8
16 V
SS
15 PCMOUT
14 PDN/BS
13 DG
12 XSYNC
11 RSYNC
10 XCLOCK
AIN+ 1
AIN– 2
GSX 3
AG 4
AOUT 5
TMC 6
V
DD
7
16 V
SS
15 PCMOUT
14 PDN/BS
13 DG
12 XSYNC
11 RSYNC
10 XCLOCK
AIN+ 1
AIN– 2
GSX 3
AG 4
AOUT+ 5
AOUT– 6
V
DD
7
16 V
SS
15 PCMOUT
14 PDN/BS
13 DG
12 XSYNC
11 RSYNC
10 XCLOCK
9 RCLOCK
9 RCLOCK PCMIN 8
9 RCLOCK PCMIN 8
NC : No connect pin
16-Pin Cer DIP
MSM6996HAS
MSM6997HAS
16-Pin Cer DIP
MSM6996VAS
MSM6997VAS
16-Pin Cer DIP
MSM6998AS
MSM6999AS
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¡ Semiconductor
MSM6996H/6996V/6997H/6997V/6998/6999
AIN+ 1
AIN– 2
GSX 3
AG 4
AG 5
NC 6
NC 7
AOUT 8
NC 9
NC 10
V
DD
11
PCMIN 12
24 V
SS
23 PCMOUT
22 PDN/BS
21 DG
20 NC
19 NC
18 NC
17 NC
16 XSYNC
15 RSYNC
14 XCLOCK
13 RCLOCK
AIN+ 1
AIN– 2
GSX 3
AG 4
AG 5
NC 6
NC 7
AOUT 8
NC 9
TMC 10
V
DD
11
PCMIN 12
24 V
SS
23 PCMOUT
22 PDN/BS
21 DG
20 NC
19 NC
18 NC
17 NC
16 XSYNC
15 RSYNC
14 XCLOCK
13 RCLOCK
NC : No connect pin
24-Pin Plastic SOP
MSM6996HGS-K
MSM6997HGS-K
NC : No connect pin
24-Pin Plastic SOP
MSM6996VGS-K
MSM6997VGS-K
AIN+ 1
AIN– 2
GSX 3
AG 4
AG 5
NC 6
NC 7
AOUT+ 8
NC 9
AOUT– 10
V
DD
11
PCMIN 12
24 V
SS
23 PCMOUT
22 PDN/BS
21 DG
20 NC
19 NC
18 NC
17 NC
16 XSYNC
15 RSYNC
14 XCLOCK
13 RCLOCK
NC : No connect pin
24-Pin Plastic SOP
MSM6998GS-K
MSM6999GS-K
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¡ Semiconductor
MSM6996H/6996V/6997H/6997V/6998/6999
PIN AND FUNCTIONAL DESCRIPTIONS
AIN+, AIN–, GSX
These three pins are used for the transmit level adjustment.
AIN+ is a non-inverting analog input pin which is connected to the non-inverting input of a transmit
amplifier.
AIN– is an inverting analog input pin which is connected to the inverting input of the transmit
amplifier.
GSX is a transmit amplifier output pin.
Adjustment can be done by following method.
Analog
Input
C1
R1
R2
AIN+
+
AIN–
GSX
–
RC
Active
Filter
R3
AG
Gain = 1 +
R2
R3
< 10
Notes: 1. R
2
+ R
3
> 10 kW
2. When the DC off-set voltage of analog input is more than 20 mV, C1 and R1 should
provide for DC blocking.
In this case, cut-off frequency of HPF, composed by R
1
and C
1
, should be less than 30 Hz.
3. R
1
should be less than 20 kW
AG
AG is an analog ground.
AG is connected to the analog system ground.
AOUT
AOUT is the analog signal output pin for the MSM6996H/V and MSM6997H/V.
The output voltage range is 5 V
PP
. This output can drive the 600
W
resistor.
AOUT+, AOUT–
Analog output for the MSM6998 and MSM6999.
The output signal amplitudes are 5 V
PP
. The AOUT– output is inverted to the AOUT+ output. These
outputs can drive a 600
W
impedance.
V
DD
V
DD
is the positive power supply.
The voltage supplied to this pin should be +5 V
±5%.
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