74HC7245 Datasheet, PDF (4/7 Pages) NXP Semiconductors – Octal bus Schmitt-trigger transceiver; 3-state

Philips Semiconductors
Octal bus Schmitt-trigger transceiver;
3-state
Product specification
74HC/HCT7245
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: bus driver
I_CC category: MSI
TRANSFER CHARACTERISTICS FOR 74HC
Voltages are referred to GND (ground = 0 V)
T_amb (°C)
TEST CONDITIONS
SYMBOL PARAMETER
74HC
+25
−40 to +85
−40 to +125
UNIT
V_CC
(V)
WAVEFORMS
min. typ. max. min. max. min. max.
V_T+
positive-going threshold
1.50
1.50
3.15
3.15
4.20
4.20
1.50 V
3.15
4.20
2.0 Figs. 4 and 5
4.5
6.0
V_T−
negative-going threshold 0.30
1.35
1.80
0.30
0.30
V 2.0 Figs. 4 and 5
1.35
1.35
4.5
1.80
1.80
6.0
V_H
hysteresis (V_T+ − V_T−) 0.1 0.2
0.25 0.4
0.3 0.5
0.1
0.25
0.3
0.1
V 2.0 Figs. 4 and 5
0.25
4.5
0.3
6.0
AC CHARACTERISTICS FOR 74HC
GND = 0 V; t_r = t_f = 6 ns; C_L = 50 pF
T_amb (°C)
TEST CONDITIONS
SYMBOL PARAMETER
74HC
+25
−40 to +85
−40 to +125
UNIT
V_CC
(V)
WAVEFORMS
min. typ. max. min. max. min. max.
t_PHL/ t_PLH
propagation delay
A_n to B_n;
B_n to A_n
33 100
125
150 ns 2.0 Fig.7
12 20
25
30
4.5
10 17
21
26
6.0
t_PZH/ t_PZL 3-state output enable time
47 160
200
240 ns 2.0 Fig.7
OE to A_n;
17 32
40
48
4.5
OE to B_n
14 27
34
41
6.0
t_PHZ/ t_PLZ 3-state output disable time
52 160
200
240 ns 2.0 Fig.7
OE to A_n;
19 32
40
48
4.5
OE to B_n
16 27
34
41
6.0
t_THL/ t_TLH output transition time
14 60
75
90 ns 2.0 Fig.7
5 12
15
18
4.5
4 10
13
15
6.0
December 1990
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