HD74BC245A Datasheet, PDF (5/9 Pages) Hitachi Semiconductor – Octal Bus Transceivers With 3 State Outputs

HD74BC245A
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
Rev.4.00, Jul.16.2004, page 5 of 8