HD74HC688 Datasheet, PDF (4/8 Pages) Hitachi Semiconductor – 8-bit Magnitude Comparator

HD74HC688
Recommended Operating Conditions
Item
Symbol
Ratings
Supply voltage
V_CC
2 to 6
Input / Output voltage
V_IN, V_OUT
0 to V_CC
Operating temperature
Input rise / fall time^*1
Ta
–40 to 85
t_r, t_f
0 to 1000
0 to 500
0 to 400
Notes: 1. This item guarantees maximum limit when one input switches.
Waveform: Refer to test circuit of switching characteristics.
Unit
V
V
°C
ns
Conditions
V_CC = 2.0 V
V_CC = 4.5 V
V_CC = 6.0 V
Electrical Characteristics
Item
Input voltage
Output voltage
Input current
Quiescent supply
current
Symbol
V_IH
V_IL
V_OH
V_OL
Iin
I_CC
V_CC (V)
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
4.5
6.0
2.0
4.5
6.0
4.5
6.0
6.0
6.0
Ta = 25°C
Min Typ Max
1.5 — —
3.15 — —
4.2 — —
— — 0.5
— — 1.35
— — 1.8
1.9 2.0 —
4.4 4.5 —
5.9 6.0 —
4.18 — —
5.68 — —
— 0.0 0.1
— 0.0 0.1
— 0.0 0.1
— — 0.26
— — 0.26
— — ±0.1
— — 4.0
Ta = –40 to+85°C
Min Max
1.5
—
3.15
—
4.2
—
—
0.5
—
1.35
—
1.8
1.9
—
4.4
—
5.9
—
4.13
—
5.63
—
—
0.1
—
0.1
—
0.1
—
0.33
—
0.33
—
±1.0
—
40
Unit
Test Conditions
V
V
V Vin = V_IH or V_IL I_OH = –20 µA
I_OH = –4 mA
I_OH = –5.2 mA
V Vin = V_IH or V_IL I_OL = 20 µA
I_OL = 4 mA
I_OL = 5.2 mA
µA Vin = V_CC or GND
µA Vin = V_CC or GND, Iout = 0 µA
Switching Characteristics
Item
Symbol V_CC (V)
Propagation delay time t_PLH
2.0
t_PHL
4.5
6.0
t_PLH
2.0
t_PHL
4.5
6.0
Output rise/fall time
t_TLH
2.0
t_THL
4.5
6.0
Input capacitance
Cin
—
Ta = 25°C
Min Typ Max
— — 210
— 17 42
— — 36
— — 120
—
9
24
— — 20
— — 75
—
5
15
— — 13
—
5
10
Ta = –40 to +85°C
Min
Max
—
265
—
53
—
45
—
150
—
30
—
26
—
95
—
19
—
16
—
10
(C_L = 50 pF, Input t_r = t_f = 6 ns)
Unit
Test Conditions
ns P or Q to output
ns Enable to P=Q
ns
pF
Rev.2.00, Mar 30, 2006 page 4 of 7