TUSB2E221 datasheet(18/65 Pages) TI

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6.7 Timing Requirements

MIN

NOM

MAX

UNIT

I/O TIMING

t_GPIO_PW

Minimum GPIO pulse width for INT event

µs

RESET TIMING

t_VDD1V8_RA

Ramp time for VDD1V8 to reach minimum 1.62V

t_VDD3V3_RA

Ramp time for VDD3V3 to reach minimum 3.0V

t_su_CROSS Setup time for CROSS sampled at the deassertion of RESETB

t_hd_CROSS Hold time for CROSS sampled at the deassertion of RESETB

t_aRESETB

Duration for RESETB to be asserted low to complete reset while powered

µs

t_RH_READY

Time for device to be ready to accept RAP and I2C requests and eUSB2

interface to be ready after RESETB is deasserted or (VDD1V8 and

VDD3V3) reach minimum recommended voltages, whichever is later

t_RS_READY

Time for device to be ready to accept RAP and I2C requests and eUSB2

interface to be ready after soft reset through I2C

350

µs

REPEATER TIMING

TJ1E

Total additive jitter for eUSB2 to USB 2.0 (output jitter - input jitter) of

repeater when one of the two repeater is disabled. (must also include all

complete SOP bits and measured with eUSB2 TX rise/fall time skew and

intra-pair prop delay skew, refer to VCM_RX_AC) [RX EQ disabled, TX PE

disabled, VOD nominal setting and no input or output channel]. Egress

setup diagram

TJ1I

Total additive jitter for USB to eUSB2 (output jitter - input jitter) of repeater

when one of the two repeater is disabled. [RX EQ disabled, TX PE

disabled, VOD nominal setting and no input or output channel]. Ingress

setup diagram

TJ2E

Total additive jitter for eUSB2 to USB (output jitter - input jitter) of repeater

when both repeaters are active. [RX EQ disabled, TX PE disabled, VOD

nominal setting and no input or output channel]

TJ2I

Total additive jitter for USB to eUSB2 (output jitter - input jitter) of repeater

when both repeaters are active. [RX EQ disabled, TX PE disabled, VOD

nominal setting and no input or output channel]

Te_to_U_DJ1

eUSB2 to USB 2.0 repeater FS jitter to next transition (Per eUSB2 spec 1.1

Table 7-13 Note 1 & 2 condition for Supply and GND delta (1))

–6.0

+6.0

TU_to_e_DJ1

USB 2.0 to eUSB2 repeater FS jitter to next transition (Per eUSB2 spec 1.1

Table 7-13 Note1 & 2 condition for Supply and GND delta (1))

–3.0

+3.0

TDJ2_e2U

Repeater FS paired transition jitter in eUSB2 to USB 2.0 direction (Relaxed

relative to THDJ2 defined by USB 2.0 +/-1ns)

–1.5

+1.5

TDJ2_U2e

Repeater FS paired transition jitter in USB 2.0 to eUSB2 direction (Relaxed

relative to THDJ2 defined by USB 2.0 +/-1ns)

–1.5

+1.5

MODE TIMING

TMODE_SWI

TCH

Time needed to change mode from UART bypass mode to and from USB

mode

µs

TUART_STAR

Time needed to start transmitting UART data after entering UART bypass

mode

I2C (FM+)

tSU_STA

Start setup time, SCL (Tr=72ns to 120ns), SDA (Tf=6.5ns to 81.5ns), 1MHz

FM+

260

tSU_STO

Stop setup time, SCL (Tr=72ns to 120ns), SDA (Tf=6.5ns to 81.5ns), 1MHz

FM+

260

tHD_STA

Start hold time, SCL (Tr=72ns to 120ns), SDA (Tf=6.5ns to 81.5ns), 1MHz

FM+

260

TUSB2E221

SNLS757B – JUNE 2024 – REVISED NOVEMBER 2024

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