MH89761 Datasheet, PDF (1/6 Pages) Mitel Networks Corporation – T1 Transmit Equalizer Advance Information

MH89761
®
T1 Transmit Equalizer
Advance Information
Features
• Compatible with the MH89760B
• Transmit equalizer and 6dB loop around circuit
• 6dB pad for easier loopback testing
• Programmable for varying degrees of
equalization
Description
The MH89761 is a programmable transmit equalizer
for use with a T1 line interface, specifically the
MH89760B. The MH89761 contains a three setting
transmit equalizer, and a 6 dB pad for external loop
around. The input and output impedance of the
circuit is 100Ω. The device is fabricated in thick film
hybrid technology and is 2 inches high by 0.5 inches
wide. The MH89761 is designed to drive 22 gauge
twisted pair from the multiplex equipment to the
crossconnect point. Figure 1 shows how the
MH89761 is connected to the transmit side of a T1
interface.
ISSUE 4
Pin Connections
TL 1
TL 2
TI 3
Ri 4
RL 5
RL 6
TxT 7
EIT 8
EA 9
L1 10
EB 11
EC 12
L2 13
RCHT 14
RCLT 15
TxR 16
EIR 17
SW 18
RCHR 19
RCLR 20
May 1995
Ordering Information -40°C to 85°C
MH89761
20 Pin SIP Hybrid
MH89760B
TR1
OUTA
• +12V
L2 1:
• ••
R1
OUTB
C2
1:
:0.5
L1
S1
S2
C1
••
•
S3
• S4
S5
•
S6
S7
RxT
RxR
TR2
1:
1:
1:
Figure 1 - Connection Diagram
MH89761
EIT
TxT
EIR
TxR
EA
EB
EC
SW
RCLT
RCHT
RCLR
RCHR
Ti
TL
Ri
RL
R1 = 150Ω
C1 = .01µF
C2 = .47µF
L1 = 33µH
L2 = 33µH
•
•
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