74HC123AP-E Datasheet, PDF (6/11 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

HD74HC123A
Switching Characteristics (C_L = 50 pF, Input t_r = t_f = 6 ns)
Ta = 25°C
Ta = –40 to +85°C
Item
Symbol V_CC (V) Min Typ Max Min
Max Unit
Test Conditions
Propagation delay tPLH
time
2.0 — — 210 —
4.5 — 22 42
—
265 ns A, B or Clear to Q
53
6.0 — — 36
—
45
t_PHL
2.0 — — 240 —
4.5 — 23 48
—
300 ns A, B or Clear to Q
60
6.0 — — 41
—
51
t_PHL
2.0 — — 170 —
4.5 — 18 34
—
215 ns Clear to Q
43
6.0 — — 29
—
37
t_PLH
2.0 — — 180 —
4.5 — 16 36
—
225 ns Clear to Q
45
6.0 — — 31
—
38
Output rise/fall
t_TLH, t_THL 2.0
—
—
75
—
time
4.5 — 5 15
—
95 ns
19
6.0 — — 13
—
16
Pulse width
t_w
2.0 150 — — 190
— ns A, B, Clear
4.5 30 6 —
38
—
6.0 26 — —
33
—
Minimum output
t_wQ(min)
2.0
— 1.5 —
—
pulse width
4.5 — 450 —
—
— µs Cext = 28 pF Rext = 6 kΩ
— ns
Rext = 2 kΩ
6.0 — 380 —
—
—
Output pulse width t_wQ
4.5 — 1.0 —
—
Input capacitance Cin
—
— 5 10
—
— ms Cext = 0.1 µF, Rext = 10 kΩ
10 pF
Caution in use: In order to prevent any malfunctions due to noise, connect a high-frequency performance capacitor
between V_CC and GND, and keep the wiring between the External components and Cext, Rext/Cext
pins as short as possible.
Test Circuit
Measurement point
C_L*
Note: C_L includes the probe and fig capacitance.
Rev.2.00, Oct 11, 2005 page 4 of 8