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SDLS153A January 1981 – January 2016 SN74LS292 , SN74LS294

PRODUCTION DATA.

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N|16
- MPDI002C

散热焊盘机械数据 (封装 | 引脚)

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6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)⁽¹⁾

		MIN	MAX	UNIT
V_CC⁽²⁾	Supply voltage		7	V
	Input voltage		7	V
T_J	Junction temperature		150	°C
T_stg	Storage temperature	–65	150	°C

(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

(2) Voltage values are with respect to network ground terminal.

6.2 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)

			MIN	NOM	MAX	UNIT
V_CC	Supply voltage		4.75	5	5.25	V
V_IH	High-level input voltage		2			V
V_IL	Low-level input voltage				0.8	V
I_OH	High-level output current (Q only)				–1.2	mA
I_OL	Low-level output current (Q only)				24	mA
f_clock	Clock frequency		0		30	MHz
t_w	Duration of clock input pulse		16			ns
t_w	Duration of clear pulse	SN74LS292	55			ns
t_w	Duration of clear pulse	SN74LS294	35			ns
t_su	Clear inactive-state set-up time		15			ns
T_A	Operating free-air temperature		0		70	°C

6.3 Thermal Information

THERMAL METRIC⁽¹⁾		SN74LS292	UNIT
		N (PDIP)
		16 PINS
R_θJA	Junction-to-ambient thermal resistance	36.8	°C/W
R_θJC(top)	Junction-to-case (top) thermal resistance	22.2	°C/W
R_θJB	Junction-to-board thermal resistance	17.0	°C/W
ψ_JT	Junction-to-top characterization parameter	7.0	°C/W
ψ_JB	Junction-to-board characterization parameter	16.8	°C/W

(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953.

6.4 Electrical Characteristics

over operating free-air temperature range (unless otherwise noted)

PARAMETER		TEST CONDITIONS⁽¹⁾		MIN	TYP⁽²⁾	MAX	UNIT
V_IK		V_CC = MIN, I_I = –18 mA				–1.5	V
V_OH	Q	V_CC = MIN, V_IH = 2 V, I_OH = –1.2 mA, V_IL = MAX		2.4	3.4		V
V_OL	Q	V_CC = MIN, V_IH = 2 V, V_IL = MAX	I_OL = 12 mA		0.25	0.4	V
	Q		I_OL = 24 mA		0.35	0.5
	TP⁽³⁾		I_OL = 0.5 mA		0.25	0.4
I_I		V_CC = MAX, V_I = 7 V				0.1	mA
I_IH		V_CC = MAX, V_I = 2.7 V				20	mA
I_IL	CLK1, CLK2	V_CC = MAX, V_I = 0.4 V				–0.8	mA
I_IL	All others	V_CC = MAX, V_I = 0.4 V				–0.4	mA
I_OS⁽⁴⁾	Q	V_CC = MAX		–30		–130	mA
I_CC	SN74LS292	V_CC = MAX, all inputs grounded, all outputs open			40	75	mA
I_CC	SN74LS294	V_CC = MAX, all inputs grounded, all outputs open			30	50	mA

(1) For conditions shown as MIN or MAX, use the appropriate value specified under Recommended Operating Conditions.

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

(3) The TP output or outputs are not intended to drive external loads, but are solely provided for test points.

(4) The duration of the short-circuit should not exceed one second.

6.5 Switching Characteristics

V_CC = 5 V, T_A = 25°C, R_L = 667 Ω, C_L = 45 pF (see Figure 1)

PARAMETER	TEST CONDITIONS		MIN	TYP	MAX	UNIT
f_max	From CLK1 or 2		30	50		MHz
t_PLH	From CLK1 or 2, to Q; Modulo set at 2², A through # = LLLHL (xxxxLS292), A through D = LLHL (xxxxLS294)			55	90	ns
t_PHL	From CLK1 or 2, to Q; Modulo set at 2², A through # = LLLHL (xxxxLS292), A through D = LLHL (xxxxLS294)			80	120	ns
	From CLR, to Q	SN74LS292		85	130
	From CLR, to Q	SN74LS294		35	65

SN74LS292 SN74LS294 switching_loads_SDLS153.gif

Figure 1. Switching Loads

SN74LS292 SN74LS294 timing_diagram_SDLS153.gif

Figure 2. Timing Diagram

6.6 Typical Characteristics

Figure 3. V_OL vs I_OL