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ZHCSMX2B June 2007 – July 2021 TRS3221E

PRODUCTION DATA

8.4 Device Functional Modes

Table 8-1 Driver

INPUTS⁽¹⁾				OUTPUT	DRIVER STATUS
DIN	FORCEON	FORCEOFF	VALID RIN RS-232 LEVEL	DOUT	DRIVER STATUS
X	X	L	X	Z	Powered off
L	H	H	X	H	Normal operation with automatic power down disabled
H	H	H	X	L	Normal operation with automatic power down disabled
L	L	H	Yes	H	Normal operation with automatic power down enabled
H	L	H	Yes	L	Normal operation with automatic power down enabled
L	L	H	No	Z	Powered off by automatic power-down feature
H	L	H	No	Z	Powered off by automatic power-down feature

(1) H = high level, L = low level, X = irrelevant, Z = high impedance, Yes = |RIN| > 2.7 V, No = |RIN| < 0.3 V

Table 8-2 Receiver

(1) H = high level, L = low level, X = irrelevant, Z = high impedance (off), Open = input disconnected or connected driver off

Table 8-3 INVALID

(1) H = high level, L = low level, X = irrelevant, Z = high impedance (off), Open = input disconnected or connected driver off

Figure 8-1 Logic Diagram