MT88E39AS1 Datasheet MT88E39ASR1, MT88E39AS1 | P7-P9

MT88E39 Data Sheet

Zarlink Semiconductor Inc.

Figure 6 - Application Circuit

IN+

IN-

Ref

OSC1

OSC2

MODE

PWDN

DATA

DCLK

MT88E39

CAP

Vdd

= To microcontroller

= From microcontroller

100 nF

TIP

RING

Vdd

R10

464 K

200 K

330 nF

100 nF

Vdd

10 nF

Motorola

4N25

10%

1N5231B

10%

Xtal

To microcontroller

(Ring Detect)

Vdd

20%

(FSK interface mode 0 selected)

250 V

50 V

Note:

*1 R8 and R9 not required when FSK interface mode 1 is selected.

Unless stated otherwise, resistors are 1%, 0.1 Watt; capacitors are 5%, 6.3 V

D1, D2, D3, D4 = diodes, 1N4003 or 1N4148 or equivalent

D5, D6, D7, D8 = bridge rectifier diodes, 1N914

Xtal = 3.579545 MHz, +/-0.2%

R8 = R9 = 100 K, 20%

R10 = 12K1, 1W5, 5%, Fusible resistor

R2 = R4 = 34 K

For 1000 Vrms, 60 Hz isolation from Tip to Earth and Ring to Earth:

R1 = R3 = 430 K, 0.5 W, 5%, 475 V minimum. e.g., IRC Type GS-3

C1 = C2 = 2 n2, 1332 V minimum

If the 1000Vrms is met by other means, then this circuit has to meet FCC part 68 Type B Ringing:

R1 = R3 = 432 K, 0.1 W, 1%, 56 V minimum

C1 = C2 = 2n2, 212V minimum

Example of component values for Vdd = 5 V +/- 10%

For Bellcore applications, set input gain = 0 dB: For ETSI applications, set input gain = -2.5 dB:

R5 = 53K6 R5 = 53K6

R6 = 60K4 R6 = 63K4

R7 = 464K R7 = 348K

Example of component values for Vdd = 3 V +/- 10%

For Bellcore applications, set input gain = -3 dB: For ETSI applications, set input gain = -5.5 dB:

R5 = 44K2 R5 = 44K2

R6 = 51K1 R6 = 53K6

R7 = 332K R7 = 249K

MT88E39 Data Sheet

Zarlink Semiconductor Inc.

Note:

*1: Recommended by TIA/EIA-716. Bellcore has agreed to the values and will incorporate them into its future standards.

*2: ETS 300 778-1 (On-hook) Sep 97, ETS 300 778-2 (Off-hook) Jan 97.

*3: dBm = Decibels above or below a reference power of 1 mW into 600 ohms. 0 dBm = 0.7746 Vrms.

*4: dBV = Decibels above or below a reference voltage of 1 Vrms. 0 dBV = 1 Vrms.

*5: On-hook signal range. The Off-hook signal levels are inside this range: -30.78 to -7.78 dBm.

Figure 7 - Application Circuit (multiple interrupt source)

Parameter North America: Bellcore

Europe: ETSI

Mark (logical 1) frequency 1200 Hz +/- 1% 1300 Hz +/- 1.5%

Space (logical 0) frequency 2200 Hz +/- 1% 2100 Hz +/- 1.5%

Received signal level -36.20 to -4.23 dBm

(12 to 476 mVrms)

-33.78 to -5.78 dBm

(-36 to -8 dBV

)

Reject signal level -48.23 dBm (3 mVrms)

(VMWI only)

-47.78 dBm (-50 dBV)

Transmission rate 1200 baud +/- 1% 1200 baud +/- 1%

Twist -6 to +10 dB -6 to +6 dB

Signal to noise ratio Single tone (f):

-18 dB (f<=60 Hz)

-12 dB (60<f<=120 Hz)

-6 dB (120<f<=200 Hz)

+25 dB (200<f<3200 Hz)

+6 dB (f>=3200 Hz)

>= 25 db

(300 to 3400 Hz)

MT88E39 FSK input gain

for Vdd = 5 V +/-10%

0dB -2.5dB

Table 1 - FSK signal characteristics specified by some standard bodies

Interrupt Source 1

Interrupt Source 2

MT88E39

Vdd

*R2 can be omitted if mode 1 is selected

R2 *

Vdd

INT (input)

Microcontroller

Input Port Bit

R1 can be opened and

D1 shorted if the

microcontroller does not

read the INT1

pin.

INT1

(open drain)

INT2

(CMOS)

(Mode 0: Open Drain)

(Mode 1: CMOS

MT88E39 Data Sheet

Zarlink Semiconductor Inc.

* Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied.

† DC Electrical Characteristics are over recommended operating conditions unless otherwise stated.

* Typical figures are at 25°C and are for design aid only.

Note 1: PWDN = Vdd. FSK input = 0 mVrms. Digital inputs at either Vdd or Vss. No current drawn from output pins.

Note 2: PWDN = Vss. FSK input = 0 mVrms. With no current drawn from Vref, OSC2 and all digital pins.

Absolute Maximum Ratings* - Voltages are with respect to V

unless otherwise stated.

Parameter Symbol Min. Max. Units

1 DC Power Supply Voltage V

to V

-0.3 6 V

2 Voltage on any pin V

-0.3 V

+0.3 V

3 Current at any pin (except V

and V

I/O

±10 mA

4 Storage Temperature T

-65 +150 °C

5 Package Power Dissipation P

500 mW

Recommended Operating Conditions

- Voltages are with respect to ground (V

) unless otherwise stated.

Characteristics Sym. Min. Typ. Max. Units Test Conditions

1 DC Power Supply Voltage V

2.7 5.5 V

2 Clock Frequency f

OSC

3.579545 MHz

3 Tolerance on Clock Frequency ∆fc ±0.2 %

4 Operating Temperature -40 +85 °C

DC Electrical Characteristics

†

Characteristics Sym. Min. Typ.* Max. Units

Test

Conditions

Standby Supply Current I

DDQ

0.1 15 µA Notes* 1

2 Operating Supply Current

= 3.0 V, 25

= 5.0 V, 25

1.2

1.9

2.0

3.0

Notes* 2

DR,

DATA,

DCLK

Sink Current I

2.5 mA V

= 0.1 V

4 Source current

DATA

DCLK (in mode 0)

, CD (in mode 1)

0.8 mA V

= 0.9 V

DR, CD

Output hi-Z current

(in mode 0)

10 µAV

to V

PWDN,

DCLK

(in mode

Schmitt Input High Threshold

Schmitt Input Low Threshold

T+

T-

0.48*V

0.28*V

0.68*V

0.48*V

7 Schmitt Hysteresis V

HYS

0.2 V

MODE

CMOS Input High Voltage

CMOS Input Low Voltage

0.7*V

0.3*V

PWDN,

DCLK,

MODE

Input Current I

10 µAV

≤ V

VRef

Output Voltage V

Ref

0.5*V

- 0.1 0.5*V

+ 0.1 V No Load

11 Output Resistance R

Ref

2kΩ

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P16

MT88E39AS1

Mfr. #:

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Telecom Interface ICs Pb Free CNIC 1.1

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MT88E39AS1

MT88E39AS1

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