STCD1020 Datasheet, PDF (16/40 Pages) STMicroelectronics – Multi-channel clock distribution circuit

DC and AC parameters
STCD1020, STCD1030, STCD1040
Table 7.
Symbol
DC and AC characteristics (1.8 V supply)
Parameter
Condition⁽¹⁾
Min Typ Max Unit
P_N Additive phase noise⁽³⁾⁽⁸⁾
at 1 kHz offset
at 10 kHz offset
at 100 kHz offset
-135
-145
-150
dBc/
Hz
t_RECB
Buffer recovery time from off to
on
STCD10x0 active
20
μs
t_RECC
STCD10x0 active recovery time
from standby to active
50
μs
C_L Capacitive load for each channel
10
20 pF
R_L Resistive load for each channel
10
kΩ
1. Valid for ambient operating temperature: T_A = -40°C to 85°C; V_CC = 1.65 V to 2.75 V; typical T_A = 25°C; Load
capacitance = 10 pF (except where noted).
2. Clock input voltage level should not exceed supply rails.
3. Simulated and determined via design and NOT 100% tested.
4. The quiescent current is measured when the enable pins are active, but without input master clock signal (fmclk = 0 Hz).
5. The active current is dependent on the master clock input Vpp and frequency and the capacitive load condition. The
typical test condition is 26 MHz sine wave with 1 Vpp master clock input, C_L = 10 pF.
6. The rise time is measured when clock edge transfers from 10% V_CC to 90% V_CC. The fall time is measured when clock
edge transfers from 90% V_CC to 10% V_CC.
7. Other test results are under test condition V_ENH = 1.8 V and V_ENL = 0 V.
8. Guaranteed with the supply noise of 30 μ Vrms from 300 Hz to 50 kHz.
Table 8. Operating and AC measurement conditions (2.8 V supply)
Parameter
Condition
Unit
V_CC supply
2.5 to 3.6
V
Output clock voltage (CLK1…CLK4)
0 to V_CC
V
Device enable voltage (EN1…EN4)
0 to V_CC
V
Ambient operating temperature (T_A)
-40 to +85
°C
Table 9.
Symbol
DC and AC characteristics (2.8 V supply)
Parameter
Condition⁽¹⁾
f_MCLK
V_CC
Vin
Vout
Master clock (eg. from VCTCXO)
Supply voltage
Input clock voltage level⁽²⁾
Output gain level⁽³⁾
I_Q
Quiescent current⁽⁴⁾
Sine wave/square wave
C_L = 10 pF
2 buffers version
3 buffers version
4 buffers version
Min
Typ Max Unit
10
26
52 MHz
2.5
2.8 3.6 V
0.75
1
Vpp
-1.5
-0.5
dB
1.7 2.6
2.2 3.3 mA
2.8
4
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