74HC2G14 Datasheet, PDF (11/17 Pages) NXP Semiconductors – Inverting Schmitt-triggers

Philips Semiconductors
Inverting Schmitt-triggers
AC WAVEFORMS
Preliminary specification
74HC2G14; 74HCT2G14
handbook, halfpag^Ve_I
nA input
GND
VOH
nY output
VOL
VM
t _PHL
VM
t _THL
VM
VM
10%
t _PLH
90%
t _TLH
MNA722
For HC2G: V_M = 50%; V_I = GND to V_CC.
For HCT2G: V_M = 1.3 V; V_I = GND to 3.0 V.
Fig.12 The input (nA) to output (nY) propagation delays and output transition times.
handbook, full pagewidth
VCC
VI
PULSE
GENERATOR
VO
D.U.T.
RT
S1
RL =
1 kΩ
VCC
open
GND
CL =
50 pF
MNA742
TEST
t_PLH/t_PHL
t_PLZ/t_PZL
t_PHZ/t_PZH
S₁
open
V_CC
GND
2003 May 1
Definitions for test circuit:
C_L = load capacitance including jig and probe capacitance (see “AC characteristics”).
R_T = termination resistance should be equal to the output impedance Z_o of the pulse generator.
Fig.13 Load circuitry for switching times.
11