ZHCSPB2J November 1998 – November 2021 CD54HC138 , CD54HC238 , CD54HCT138 , CD54HCT238 , CD74HC138 , CD74HC238 , CD74HCT138 , CD74HCT238
PRODUCTION DATA
- 1 特性
- 2 说明
- 3 Revision History
- 4 Pin Configuration and Functions
- 5 Specifications
- 6 Parameter Measurement Information
- 7 Detailed Description
- 8 Power Supply Recommendations
- 9 Layout
- 10Device and Documentation Support
- 11Mechanical, Packaging, and Orderable Information
封装选项
请参考 PDF 数据表获取器件具体的封装图。
机械数据 (封装 | 引脚)
- PW|16
- NS|16
- N|16
- D|16
散热焊盘机械数据 (封装 | 引脚)
订购信息
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 Ω, 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 Push-Pull
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 6-3 Voltage Waveforms, Input
and Output Transition Times for Standard CMOS Inputs
(1) The greater between
tPLH and tPHL is the same as
tpd.
Figure 6-4 Voltage Waveforms,
Propagation Delays for TTL-Compatible Inputs