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BUY SN74LS377DWR https://www.utsource.net/itm/p/826388.html
These monolithic, positive-edge-triggered flip-flops utilize TTL circuitry to implement D-type flip-flop logic with an enable input. The 'LS377, 'LS378, and 'LS379 devices are similar to 'LS273, 'LS174, and 'LS175, respectively, but feature a common enable instead of a common clear. Information at the D inputs meeting the setup time requirements is transferred to the Q outputs on the positive-going edge of the clock pulse if the enable input G is low. Clock triggering occurs at a particular voltage level and is not directly related to the transition time of the positive-going pulse. When the clock input is at either the high or low level, the D input signal has no effect at the output. The circuits are designed to prevent false clocking by transitions at the G input. These flip-flops are guaranteed to respond to clock frequencies ranging from 0 to 30 MHz while maximum clock frequency is typically 40 megahertz. Typical power dissipation is 10 milliwatts per flip-flop.

Below is the parameter table and instructions for the SN74LS377DWR, which is an 8-bit transparent latch with 3-state outputs.

SN74LS377DWR Parameter Table

Parameter	Symbol	Min	Typ	Max	Unit	Conditions
Supply Voltage	VCC	4.75	5.0	5.25	V
Input Voltage High	VIH	2.0		5.25	V
Input Voltage Low	VIL	0.0		0.8	V
Output Voltage High	VOH	2.4	3.5		V	IO = -4.0 mA
Output Voltage Low	VOL	0.0	0.4		V	IO = 16.0 mA
Input Current (High)	IIH		40		μA	VIN = VCC
Input Current (Low)	IIL		-1.6		μA	VIN = 0 V
Output Current (High)	IOH		-4.0		mA	VOUT = 2.4 V
Output Current (Low)	IOL		16.0		mA	VOUT = 0.4 V
Propagation Delay Time	tpd		15		ns	VCC = 5 V, TA = 25°C
Power Dissipation	PD			150	mW
Operating Temperature Range	TA	-40		85	°C
Storage Temperature Range	TSTG	-65		150	°C

Instructions for SN74LS377DWR

1. Power Supply:

   • Connect V_CC to +5V and GND to ground.
   • Ensure the power supply is stable and within the specified range (4.75V to 5.25V).

2. Input Signals:

   • Apply logic high (V_IH) or low (V_IL) signals to the data inputs (D0-D7).
   • The latch enable (LE) input controls when the data is latched. When LE is high, the data is transparent and follows the input. When LE is low, the data is latched.

3. Output Control:

   • The output enable (OE) input controls the state of the outputs. When OE is low, the outputs are active. When OE is high, the outputs are in a high-impedance state.
   • Ensure that OE is controlled properly to avoid bus contention issues.

4. Timing Considerations:

   • Pay attention to the propagation delay time (t_pd) to ensure proper timing in your circuit.
   • Use appropriate pull-up or pull-down resistors if necessary to stabilize input signals.

5. Thermal Management:

   • Ensure adequate heat dissipation if operating at the maximum power dissipation (P_D).
   • Keep the operating temperature within the specified range (-40°C to 85°C).

6. Storage and Handling:

   • Store the device in a dry, cool place within the storage temperature range (-65°C to 150°C).
   • Handle the device with care to avoid static damage. Use ESD protection measures.

7. Pin Configuration:

   • Refer to the datasheet for the specific pin configuration and layout of the SN74LS377DWR.

By following these parameters and instructions, you can effectively use the SN74LS377DWR in your digital circuits.

(For reference only)