AK2548 Просмотр технического описания (PDF) - Asahi Kasei Microdevices

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производитель

AK2548

7 channel E1 Transceiver

Asahi Kasei Microdevices 

ASAHI KASEI

[AK2548]

TRANSMITTER

Transmitter characteristics are guaranteed on the conditions as shown below.

VDD=3.3V±5%,VSS,GND=0V,Ta=-40~85ºC, MCLK frequency:2.048MHz±100ppm, 32.768MHz±100ppm

Parameter

Symbol Min Typ Max Units

Condition

Output Pulse Shape

G.703

Output Pulse Amplitude 75Ω

120Ω

Pulse Amplitude for a 75Ω

space

120Ω

Output Pulse Imbalance amplitudes

widths

2.14 2.37

2.7 3.0

-0.237

-0.3

-4

-4

2.60

3.3

0. 237

0.3

4

4

V0p Note 1

V0p

V0p Note 1

V0p

%

%

Output Jitter

20Hz-100kHz

0.05 UIpp

Return Loss

51kHz-102kHz

9

dB

102kHz-2.048MHz

15

dB

2.048MHz-3.072MHz

11

dB

Note1: Turns Ratio, DCR and external resistors are recommended value. (P27)

Pulse Mask Template (G.703)

V = 100%

269 ns

(244 + 25)

194 ns

(244 – 50)

Nominal pulse

50%

0%

244 ns

219 ns

(244 – 25)

488 ns

(244 + 244)

Note – V corresponds to the nominal peak value.

Mask of the pulse at the 2048 kbit/s interface

C0028-E-00

11

1999/9

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