HD74BC245A Datasheet, PDF (5/8 Pages) Hitachi Semiconductor – Octal Bus Transceivers With 3 State Outputs

Switching Test Method (C_L = 50 pF)
Item
Propagation delay time
Output enable time
Output disable time
Input capacitanse
Output capacitance
Symbol
Ta = 25°C
V_CC = 5.0 V
Min
Max
t _PLH
3.0
6.0
t _PHL
3.0
6.0
t _PLH
3.0
6.0
t _PHL
3.0
6.0
t _ZH
3.0
9.0
t _ZL
3.0
9.0
t _ZH
3.0
9.0
t _ZL
3.0
9.0
t _HZ
3.0
8.0
t _LZ
3.0
8.0
t _HZ
3.0
8.0
t _LZ
3.0
8.0
C_IN
3.0(Typ)
C_I/O
15.0(Typ)
HD74BC245A
Ta = –40 to 85°C
V_CC = 5.0 V ±10%
Min
Max
3.0
7.0
3.0
7.0
3.0
7.0
3.0
7.0
3.0
11.0
3.0
11.0
3.0
11.0
3.0
11.0
3.0
10.0
3.0
10.0
3.0
10.0
3.0
10.0
—
—
Unit Test Conditions
ns An to Bn
ns Bn to An
ns G to Bn
ns G to An
ns G to Bn
ns G to An
pF V_IN = V_CC or GND
pF V_I/O = V_CC or GND
Test Circuit
VCC
Input
Pulse Generator
Zout = 50 Ω
VCC
G
S1
A1
Output
500 Ω
B1
C_L=
450 Ω
DiR
50 pF _{50 Ω Scope}
*4
OPEN
7V
Notes:
1. C_L includes probe and jig capacitance.
2. A2-B2, A3-B3, A4-B4, A5-B5, A6-B6, A7-B7, A8-B8 are identical to above load circuit.
3. S1: Input-Output change switch.
4. Open: t_PLH, t_PHL, t_ZH, t_HZ
7 V: t_ZL, t_LZ
5