请参考 PDF 数据表获取器件具体的封装图。
LSF 系列包含双向电压电平转换器,该转换器可在 0.8V 至 4.5V (Vref_A) 和 1.8V 至 5.5V (Vref_B) 电压范围内运行。该范围支持在 0.8V 和 5.0V 之间进行双向电压转换,无需在漏极开路或推挽应用中使用方向端子。对于采用 15pF 电容器和 165Ω 上拉电阻器的漏极开路系统,LSF 系列支持传输速度大于 100MHz 的电平转换应用。
当 An 或 Bn 端口为低电平时,此开关处于接通状态,而且 An 和 Bn 端口之间存在低电阻连接。开关的低 Ron 可实现具有超小传播延迟和信号失真的连接。A 端或 B 端的电压将限制为 Vref_A,且可上拉至 Vref_A 到 5V 之间的任何电压水平。利用此功能,可在无需方向控制的情况下,在用户选择的较高和较低电压之间实现无缝转换。
器件型号 | 封装 | 封装尺寸(标称值) |
---|---|---|
LSF0204x | TSSOP (14) | 5.00mm × 4.40mm |
UQFN (12) | 2.00mm × 1.70mm | |
VQFN (14) | 3.50mm × 3.50mm | |
DSBGA (12) | 1.90mm × 1.40mm |
Changes from Revision G (November 2019) to Revision H (April 2021)
Changes from Revision F (January 2019) to Revision G (November 2019)
Changes from Revision E (December 2018) to Revision F (January 2019)
Changes from Revision D (December 2015) to Revision E (December 2018)
Changes from Revision C (August 2015) to Revision D (December 2015)
Changes from Revision B (April 2015) to Revision C (August 2015)
Changes from Revision A (December 2014) to Revision B (April 2015)
每个通道的电源电压 (Vpu#) 可以用上拉电阻器单独进行设置。例如,CH1 可用于上行转换模式 (1.2V ↔ 3.3V),CH2 可用于下行转换模式 (2.5V ↔ 1.8V)。
当 EN 为高电平时,转换器开关打开,并且 An I/O 分别连接至 Bn I/O,从而实现端口间的双向数据流。当 EN 为低电平时,转换器开关关闭,端口之间呈高阻抗状态。EN 输入电路被设计成由 Vref_A 供电。EN 必须为低电平,从而确保上电或断电期间的高阻抗状态。
器件型号 | EN | An | Bn | 说明 |
---|---|---|---|---|
LSF0204D | H | 将所有数据引脚置于三态模式(高阻态) | 将所有数据引脚置于三态模式(高阻态) | 三态输出模式启用 (低电平有效;以 Vref_A 为基准) |
LSF0204D | L | 输入或输出 | 输入或输出 | |
LSF0204 | H | 输入或输出 | 输入或输出 | 三态输出模式启用 (高电平有效,以 Vref_A 为基准) |
LSF0204 | L | 将所有数据引脚置于三态模式(高阻态) | 将所有数据引脚置于三态模式(高阻态) |
PIN | TYPE(1) | DESCRIPTION | ||||
---|---|---|---|---|---|---|
NAME | NO. | |||||
PW, RGY | RUT | YZP | ||||
Vref_A | 1 | 1 | B2 | — | Reference supply voltage; see Application and Implementation section | |
A1 | 2 | 2 | A3 | I/O | Input/output 1. | |
A2 | 3 | 3 | B3 | I/O | Input/output 2. | |
A3 | 4 | 4 | C3 | I/O | Input/output 3. | |
A4 | 5 | 5 | D3 | I/O | Input/output 4. | |
NC | 6 | – | — | — | No connection. Not internally connected. | |
GND | 7 | 6 | D2 | — | Ground | |
EN | 8 | 12 | C2 | I | Switch enable input; LSF0204: EN is high-active; LSF0204D: EN is low-active | |
NC | 9 | – | — | — | No connection. Not internally connected. | |
B4 | 10 | 7 | D1 | I/O | Input/output 4. | |
B3 | 11 | 8 | C1 | I/O | Input/output 3. | |
B2 | 12 | 9 | B1 | I/O | Input/output 2. | |
B1 | 13 | 10 | A1 | I/O | Input/output 1. | |
Vref_B | 14 | 11 | A2 | — | Reference supply voltage; see Application and Implementation section |
MIN | MAX | UNIT | |||
---|---|---|---|---|---|
VI | Input voltage (2) | –0.5 | 7 | V | |
VI/O | Input/output voltage (2) | –0.5 | 7 | V | |
Continuous channel current | 128 | mA | |||
IIK | Input clamp current | VI < 0 | –50 | mA | |
TJ | Junction temperature | 150 | °C | ||
Tstg | Storage temperature | –65 | 150 | °C |
VALUE | UNIT | |||
---|---|---|---|---|
V(ESD) | Electrostatic discharge | Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) | ±2000 | V |
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) | ±1000 |
MIN | MAX | UNIT | ||
---|---|---|---|---|
VI/O | Input/output voltage | 0 | 5.5 | V |
Vref_A/B/EN | Reference voltage | 0 | 5.5 | V |
IPASS | Pass transistor current | 64 | mA | |
TA | Operating free-air temperature | –40 | 125 | °C |
THERMAL METRIC(1) | LSF0204 | UNIT | ||||
---|---|---|---|---|---|---|
RGY (VQFN) | RUT (UQFN) | PW (TSSOP) | YZP (DSBGA) | |||
14 PINS | 12 PINS | 14 PINS | 12 BALLS | |||
RθJA | Junction-to-ambient thermal resistance | 83.2 | 195.8 | 157.9 | 83.7 | °C |
RθJC(top) | Junction-to-case (top) thermal resistance | 98.2 | 98.7 | 82.3 | 0.6 | °C |
RθJB | Junction-to-board thermal resistance | 59.2 | 122.6 | 100.0 | 23.7 | °C |
ψJT | Junction-to-top characterization parameter | 17.4 | 6.2 | 22.9 | 0.4 | °C |
ψJB | Junction-to-board characterization parameter | 59.4 | 122.6 | 99.0 | 23.7 | °C |
RθJC(bot) | Junction-to-case (bottom) thermal resistance | 38.7 | N/A | N/A | N/A | °C |
PARAMETER | TEST CONDITIONS | MIN | TYP(1) | MAX | UNIT | |||
---|---|---|---|---|---|---|---|---|
VIK | II = -18 mA, VEN = 0 | –1.2 | V | |||||
IIH | VI = 5 V, VEN = 0 | 5.0 | µA | |||||
ICCBA | Leakage from Vref_B to Vref_A | Vref_B = 3.3 V, Vref_A = 1.8 V, VEN = Vref_A IO = 0, VI = 3.3 V or GND | 3.5 | µA | ||||
ICCA + ICCB(4) | Total Current through GND | Vref_B = 3.3 V, Vref_A = 1.8 V, VEN = Vref_A IO = 0, VI = 3.3 V or GND | 0.2 | µA | ||||
IIN | Control pin current | Vref_B = 5.5 V, Vref_A = 4.5 V, VEN = 0 to Vref_A IO = 0 | ±1 | µA | ||||
Ioff | Power Off Leakage Current | Vref_B = Vref_A = 0 V, VEN = GND IO = 0, VI = 5 V or GND | ±1 | µA | ||||
CI(ref_A/B/EN) | VI = 3 V or 0 | 7 | pF | |||||
Cio(off) | VO = 3 V or 0, VEN = 0 | 5.0 | 6.0 | pF | ||||
Cio(on) | VO = 3 V or 0, VEN = Vref_A | 10.5 | 13 | pF | ||||
(3)VIH (EN pin) | High-level input voltage | Vref_A = 1.5 V to 4.5 V | 0.7×Vref_A | V | ||||
VIL (EN pin) | Low-level input voltage | Vref_A = 1.5 V to 4.5 V | 0.3×Vref_A | V | ||||
VIH (EN pin) | High-level input voltage | Vref_A= 1.0 V to 1.5 V | 0.8×Vref_A | V | ||||
VIL (EN pin) | Low-level input voltage | Vref_A = 1.0 V to 1.5 V | 0.3×Vref_A | V | ||||
∆t/∆v (EN pin) | Input transition rise or fall rate for EN pin | 10 | ns/V | |||||
ron (2) | VI = 0, IO = 64 mA | Vref_A = VEN = 3.3 V; Vref_B = 5 V | 3 | Ω | ||||
Vref_A = VEN = 1.8 V; Vref_B = 5 V | 4 | |||||||
VI = 0, IO = 32 mA | Vref_A = VEN = 1.0 V; Vref_B = 5 V | 9 | Ω | |||||
Vref_A = VEN = 1.8 V; Vref_B = 5 V | 4 | |||||||
VI = 0, IO = 32 mA , Vref_A = VEN = 2.5 V; Vref_B = 5 V | 10 | Ω | ||||||
VI = 1.8 V, IO = 15 mA, Vref_A = VEN = 3.3 V; Vref_B = 5 V | 5 | Ω | ||||||
VI = 1.0 V, IO = 10 mA, Vref_A = VEN = 1.8 V; Vref_B = 3.3 V | 8 | Ω | ||||||
VI = 0 V, IO = 10 mA, Vref_A = VEN = 1.0 V; Vref_B = 3.3 V | 6 | Ω | ||||||
VI = 0 V, IO = 10 mA, Vref_A = VEN = 1.0 V; Vref_B = 1.8 V | 6 | Ω |
PARAMETER | FROM (INPUT) | TO (OUTPUT) | CL = 50 pF | CL = 30 pF | CL = 15 pF | UNIT | |||
---|---|---|---|---|---|---|---|---|---|
TYP | MAX | TYP | MAX | TYP | MAX | ||||
tPLH | A or B | B or A | 0.7 | 5.49 | 0.5 | 5.29 | 0.3 | 5.19 | ns |
tPHL | 0.9 | 4.9 | 0.7 | 4.7 | 0.5 | 4.5 | ns | ||
tPLZ | 13 | 18 | 12 | 16.5 | 11 | 15 | ns | ||
tPZL | 33 | 45 | 30 | 40 | 23 | 37 | ns | ||
fMAX | 50 | 100 | 100 | MHz |
PARAMETER | FROM (INPUT) | TO (OUTPUT) | CL = 50 pF | CL = 30 pF | CL = 15 pF | UNIT | |||
---|---|---|---|---|---|---|---|---|---|
TYP | MAX | TYP | MAX | TYP | MAX | ||||
tPLH | A or B | B or A | 0.8 | 4.1 | 0.5 | 3.9 | 0.3 | 3.8 | ns |
tPHL | 0.9 | 4.7 | 0.7 | 4.5 | 0.6 | 4.3 | ns | ||
fMAX | 50 | 100 | 100 | MHz |
PARAMETER | FROM (INPUT) | TO (OUTPUT) | CL = 50 pF | CL = 30 pF | CL = 15 pF | UNIT | |||
---|---|---|---|---|---|---|---|---|---|
TYP | MAX | TYP | MAX | TYP | MAX | ||||
tPLH | A or B | B or A | 0.6 | 5.7 | 0.4 | 5.3 | 0.2 | 5.13 | ns |
tPHL | 1.3 | 6.7 | 1 | 6.4 | 0.7 | 5.3 | ns | ||
tPLZ | 13 | 18 | 12 | 16.5 | 11 | 15 | ns | ||
tPZL | 33 | 45 | 30 | 40 | 23 | 37 | ns | ||
fMAX | 50 | 100 | 100 | MHz |
PARAMETER | FROM (INPUT) | TO (OUTPUT) | CL = 50 pF | CL = 30 pF | CL = 15 pF | UNIT | |||
---|---|---|---|---|---|---|---|---|---|
TYP | MAX | TYP | MAX | TYP | MAX | ||||
tPLH | A or B | B or A | 0.65 | 7.25 | 0.4 | 7.05 | 0.2 | 6.85 | ns |
tPHL | 1.6 | 7.03 | 1.3 | 6.5 | 1 | 5.4 | ns | ||
fMAX | 50 | 100 | 100 | MHz |