MT8920B Datasheet, PDF (22/24 Pages) Mitel Networks Corporation – ISO-CMOS ST-BUS™ FAMILY ST-BUS Parallel Access Circuit

MT8920B CMOS
AC Electrical Characteristics^† - ST-BUS Timing (see Figure 20)
(V_CC = 5.0V ± 5%, T_A = -40 to 85°C)
Characteristics
Sym Min Typ^‡ Max Units
Test Conditions
1 Clock C4i Period
t_CLK
244
ns
2 Clock C4i Period High
t_CH
70
122
ns
3 Clock C4i Period Low
t_CL
70 122
ns
4 C4i Rise Time
t_R
20
ns
5 C4i Fall Time
t_F
12
ns
6 Frame Pulse Setup Time
t_FPS 20
ns
7 Frame Pulse Hold Time
t_FPH 20
ns
8 STo0/1 Delay from C4i
t_SOD
100 ns Load B
9 STi0 Setup Time
t_STS 20
ns
10 STi0 Hold Time
t_STH 35
ns
† Timing is over recommended temperature & power supply voltages.
‡ Typical figures are at 25°C, V_DD=5V and are for design aid only: not guaranteed and not subject to production testing.
C4i
F0i
STo0
STo1
STi0
Bit Cell
t_FPS
t_CLK
t_FPH
t_SOD
t_CL
t_CH
t_R
t_F
t_STS
t_STH
Figure 20 - ST-BUS Timing Diagram
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