ZHCSPU7G November 1998 – October 2022 CD54HC240 , CD54HC244 , CD54HCT240 , CD54HCT241 , CD54HCT244 , CD74HC240 , CD74HC241 , CD74HC244 , CD74HCT240 , CD74HCT241 , CD74HCT244
PRODUCTION DATA
- 1 特性
- 2 說明
- 3 Revision History
- 4 Pin Configuration and Functions
-
5 Specifications
- 5.1 Absolute Maximum Ratings (1)
- 5.2 Recommended Operating Conditions
- 5.3 Thermal Information
- 5.4 Electrical Characteristics '240
- 5.5 Electrical Characteristics '241
- 5.6 Electrical Characteristics '244
- 5.7 Switching Characteristics '240
- 5.8 Switching Characteristics '241
- 5.9 Switching Characteristics '244
- 6 Parameter Measurement Information
- 7 Detailed Description
- 8 Power Supply Recommendations
- 9 Layout
- 10Device and Documentation Support
- 11Mechanical, Packaging, and Orderable Information
6 Parameter Measurement Information
Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 ?, tt < 6 ns.
For clock inputs, fmax is measured when the input duty cycle is 50%.
The outputs are measured one at a time with one input transition per measurement.
(1) CL includes probe
and test-fixture capacitance.
Figure 6-1 Load Circuit for 3-State
Outputs
(1) The
greater between tPLH and tPHL is the same as
tpd.
Figure 6-2 Voltage Waveforms,
Propagation Delays for Standard CMOS Inputs
(1) The greater between
tr and tf is the same as tt.
Figure 6-4 Voltage Waveforms, Input
and Output Transition Times for Standard CMOS Inputs
(1) S1 = CLOSED; S2 =
OPEN.
(2) S1 = OPEN; s2 =
CLOSED.
(3) tPLZ and
tPHZ are the same as tdis.
(4) tPZL and
tPZH are the same as ten.
Figure 6-3 Voltage Waveforms,
Standard CMOS Inputs Propagation Delays
(1) The greater between
tPLH and tPHL is the same as
tpd.
Figure 6-5 Voltage Waveforms,
Propagation Delays for TTL-Compatible Inputs
(1) tPLZ and
tPHZ are the same as tdis.
(2) tPZL and
tPZH are the same as ten.
Figure 6-6 Voltage Waveforms,
TTL-Compatible CMOS Inputs Propagation Delays