STLC5465B STMicroelectronics, STLC5465B Datasheet - Page 67

• Manufacturer Part Number: STLC5465B
• Description: Telecom ICs Multi-HDLC Sw Matrix
• Manufacturer: STMicroelectronics
• Type: Telecom IC - Variousr

Specifications of STLC5465B

• Operating Supply Voltage: 4.75 V to 5.25 V
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Package / Case: PQFP-160
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

VII - MICROPROCESSOR TIMING (continued)
VII.8 - Token Ring Timing
Figure 56 : Token Ring
VII.9 - Master Clock Timing
Figure 57 : Master Clock
Crystal parameters:
a) frequency
b) Mode
c) Resonance
d) Load Capacity
in accordance with 2 capacitors (47 pF each of
them) the first capacitor is soldered nearest pin 2
(XTAL1) and nearest the ground, the second ca-
pacitor is soldered nearest pin 3 (XTAL2) and
nearest the ground.
e) Serial resistor
Symbol
Symbol
1/f
tH
t
tL
t
a
f
S
H
f
f : Masterclock frequency
Delay between Masterclock Rising Edge and Edges of TRO Pulse
delivered by the MHDLC (10pF)
Set-up Time TRI/Masterclock Masterclock Falling Edge
Hold Time TRI/Masterclock Falling Edge
Masterclock Frequency
Masterclock Period
Masterclock High
Masterclock Low
MASTER CLOCK
(applied to XTAL1 Pin)
MASTER CLOCK
(applied to XTAL1 Pin)
TRO
TRI
f (typically 32768.00 kHz)
fundamental
40 Ohms max
parallel
Cl= 30pF
Parameter
Parameter
a
1/f
t
H
To reduce the drive level, the Crystal parameters
can be:
a) frequency
b) Mode
c) Resonance
d) Load Capacity
in accordance with 2 capacitors (33 pF each of
them)
e) Serial resistor
N.B It is not necessary to add an external bias
resistor between XTAL1 pin and XTAL2 pin. This
resistor is inside the circuit.
a
1/f
V
t
V
L
t
S
DD
DD
= 5V
= 3.3V
Min.
Min.
30.3
30
12
12
5
5
t
H
f (typically 32768.00 kHz)
fundamental
parallel
Cl = 20pF
40 Ohms max
32.768
32.768
Typ.
Typ.
30.5
Max.
Max.
STLC5465B
33.3
25
30
33
0
Unit
MHz
Unit
MHz
67/101
ns
ns
ns
ns
ns
ns
ns