TCA9617B Datasheet, PDF (6/24 Pages) Texas Instruments – Level-Translating FM+ I2C Bus Repeater

TCA9617B
SCPS259A – DECEMBER 2014 – REVISED DECEMBER 2014
www.ti.com
7.6 Timing Requirements
V_CCA = 0.8 V to 5.5 V, V_CCB = 2.2 V to 5.5 V, GND = 0 V, T_A = –40°C to 85°C (unless otherwise noted)^(1)(2)(3)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
TEST CONDITIONS
MIN TYP MAX UNIT
SDAB, SCLB SDAA, SCLA
42
55 90
t_PLH
Propagation delay
t_PHL
Propagation delay
SDAA, SCLA
SDAB, SCLB
SDAA, SCLA
SDAB, SCLB
SDAA, SCLA
SDAB, SCLB
V_CCB ≤ 3 V
V_CCB > 3 V
61
88 137 ns
61
94 250
69
93 144
ns
68
90 140
t_TLH ⁽⁴⁾
Transition
time
B side
A side
30%
70%
88
ns
37
t_THL
t_su,en
Transition
time
B side
A side
70%
Setup time, EN high before Start condition⁽⁵⁾
30%
5.40 6.41 13.8
ns
1.40 4.71 11.3
100
ns
(1) Times are specified with loads of 240 Ω ±1% and 400 pF ±10% on B-side and 240 Ω ±1% and 200 pF ±10% on A-side. Different load
resistance and capacitance alter the rise time, thereby changing the propagation delay and transition times.
(2) Times are specified with A-side signals pulled up to V_CCA and B-side signals pulled up to V_CCB.
(3) Typical values were measured with V_CCA = 0.9 V and V_CCB = 2.5 V at T_A = 25°C, unless otherwise noted.
(4) T_TLH is determined by the pull-up resistance and load capacitance.
(5) EN should change state only when the global bus and the repeater port are in an idle state.
7.7 Typical Characteristics
TA = 85 C
TA = 25 C
T_A = -40 C
TA = -40 C
TA = 25 C
T_A = 85 C
V_CCA = 0.9 V
Port A IOL (mA)
V_CCB = 2.2 V
Figure 1. Port A V_OL vs I_OL
V_CCA = 0.9 V
Port B IOL (mA)
V_CCB = 2.2 V
Figure 2. Port B V_OL vs I_OL
6
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