HD74LS190 Datasheet, PDF (7/11 Pages) Hitachi Semiconductor – Synchronous Up/Down Decade Counters(single clock line)

HD74LS190
Testing Method
Test Circuit
4.5V
P.G.
Zout = 50Ω
Input
V_CC
Output
Ripple
Clock
Enable
Down/Up
Clock
Max/Min
A
B
QA
C
D
QB
Load
QC
Output
Output
Output
Output
Output
Load circuit 1
RL
CL
Same as Load Circuit 1.
Same as Load Circuit 1.
Same as Load Circuit 1.
Same as Load Circuit 1.
QD
Same as Load Circuit 1.
Notes: 1. C_L includes probe and jig capacitance.
2. All diodes are 1S2074(H).
Waveforms 1
Data Input
t_TLH
10%
90%
1.3V
t_su
t_THL
3V
90%
1.3V
10%
0V
t_su
Load Input
90%
1.3V
10%
3V
90%
1.3V
10%
0V
t_TLH
Output Q
t_TLH
V_OH
V_OL
Note: Input pulse: t_TLH, t_THL ≤ 10 ns, PRR = 1 MHz, duty cycle ≤ 50%
Rev.3.00, Jul.15.2005, page 7 of 10