ZHCSR56 数据表 | 德州仪器 TI.com.cn

ZHCSR56G January 1994 – October 2022 SN65LBC179 , SN75LBC179

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5.5 Electrical Characteristics - Driver

over recommended operating conditions (unless otherwise noted)

PARAMETER		TEST CONDITIONS		MIN	TYP⁽¹⁾	MAX	UNIT
V_IK	Input clamp voltage	I_I= − 18 mA				−1.5	V
\|V_OD\|	Differential output voltage⁽²⁾	R_L = 54 Ω See Figure 6-1	SN65LBC179, SN65LBC179Q	1.1	2.2	5	V
		R_L = 54 Ω See Figure 6-1	SN75LBC179	1.5	2.2	5
		R_L = 60 Ω See Figure 6-2	SN65LBC179, SN65LBC179Q	1.1	2.2	5
		R_L = 60 Ω See Figure 6-2	SN75LBC179	1.5	2.2	5
Δ\|V_OD\|	Change in magnitude of differential output voltage⁽³⁾	See Figure 6-1 and Figure 6-2				±0.2	V
V_OC	Common-mode output voltage	R_L = 54 Ω	See Figure 6-1	1	2.5	3	V
Δ\|V_OC\|	Change in magnitude of common-mode output voltage⁽³⁾	R_L = 54 Ω	See Figure 6-1			±0.2	V
I_O	Output current with power off	V_CC = 0,	V_O = − 7 V to 12 V			±100	μA
I_IH	High-level input current	V_I = 2.4 V				−100	μA
I_IL	Low-level input current	V_I = 0.4 V				−100	μA
I_OS	Short-circuit output current	−7 V ≤ V_O ≤ 12 V				±250	mA
I_CC	Supply current	No load	SN65LBC179, SN75LBC179		4.2	5	mA
I_CC	Supply current	No load	SN65LBC179Q		4.2	7	mA

(1) All typical values are at V_CC = 5 V and T_A = 25°C.

(2) The minimum V_OD specification of the SN65179 may not fully comply with ANSI RS-485 at operating temperatures below 0°C. System designers should take the possibly lower output signal into account in determining the maximum signal transmission distance.

(3) Δ|V_OD| and Δ|V_OC| are the changes in the steady-state magnitude of V_{_OD} and V_OC, respectively, that occur when the input is changed from a high level to a low level.