TCA9517 Datasheet, PDF (6/18 Pages) Texas Instruments – LEVEL-TRANSLATING I2C BUS REPEATER

TCA9517
SCPS242 – DECEMBER 2012
I²C INTERFACE TIMING REQUIREMENTS
V_CCB = 2.7 V to 5.5 V, GND = 0 V, T_A = –40°C to 85°C (unless otherwise noted)⁽¹⁾⁽²⁾
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
TEST CONDITIONS
t_PLZ Propagation delay
SDAB, SCLB⁽⁴⁾
(see Figure 5)
SDAA, SCLA⁽⁵⁾
(see Figure 4)
SDAA, SCLA⁽⁴⁾
(see Figure 5)
SDAB, SCLB⁽⁵⁾
(see Figure 4)
t_PZL Propagation delay
SDAB, SCLB
SDAA, SCLA⁽⁵⁾
(see Figure 4)
SDAA, SCLA
SDAB, SCLB⁽⁵⁾
(see Figure 4)
V_CCA ≤ 2.7 V
(see Figure 3)
V_CCA ≥ 3 V
(see Figure 3)
B side to A side
t_TLH Transition time
80%
20%
V_CCA ≤ 2.7 V
(see Figure 4)
V_CCA ≥ 3 V
(see Figure 4)
A side to B side
(see Figure 3)
B side to A side
t_THL Transition time
80%
20%
V_CCA ≤ 2.7 V
(see Figure 4)
V_CCA ≥ 3 V
(see Figure 4)
A side to B side
(see Figure 3)
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MIN TYP⁽³⁾ MAX UNIT
80
141 250
ns
25
74 110
30
76⁽⁶⁾ 110
10
86 230 ns
60
107 230
10
12 15
40
42 45 ns
110
125 140
1
52⁽⁶⁾ 105
20
67 175 ns
30
48 90
(1) Times are specified with loads of 1.35-kΩ pullup resistance and 50-pF load capacitance on the B side and 167-Ω pullup and 57-pF load
capacitance on the A side. Different load resistance and capacitance alter the RC time constant, thereby changing the propagation delay
and transition times.
(2) Pullup voltages are V_CCA on the A side and V_CCB on the B side.
(3) Typical values were measured with V_CCA = V_CCB = 3.3 V at T_A = 25°C, unless otherwise noted.
(4) The t_PLH delay data from B to A side is measured at 0.4 V on the B side to 0.5 V_CCA on the A side when V_CCA is less than 2 V, and
1.5 V on the A side if V_CCA is greater than 2 V.
(5) The proportional delay data from A to B side is measured at 0.3 V_CCA on the A side to 1.5 V on the B side.
(6) Typical value measured with V_CCA = 2.7 V at T_A = 25°C
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