CD54AC245_08 Datasheet, PDF (7/16 Pages) Texas Instruments – Octal-Bus Transceiver, Three-State, Non-Inverting

CD54/74AC245, CD54/74ACT245
t_f = 3ns
OUTPUTS
DISABLED
OUTPUT:
LOW TO OFF
TO LOW
OUTPUT:
HIGH TO OFF
TO HIGH
t_PLZ
t_PHZ
OUTPUTS
ENABLED
t_r = 3ns
t_PZL
t_PZH
OUTPUTS
DISABLED
INPUT LEVEL
90%
V_S
10%
GND
V_S
0.2 V_{CC VOL (≠ VCC)}
0.8 V_CC
V_S
OUTPUTS
ENABLED
OTHER
INPUTS
TIED HIGH
OR LOW
OUTPUT
DISABLE
DUT WITH
THREE-
STATE
OUTPUT
GND (t_PHZ, t_PZH)
OPEN (t_PHL, t_PLH)
R_L
500Ω
2 V_CC (t_PLZ, t_PZL)
(OPEN DRAIN)
OUT
C_L
50pF
R_L
500Ω
(NOTE 14)
NOTE:
14. For AC Series only: When V_CC = 1.5V, R_L = 1kΩ.
FIGURE 2. THREE-STATE PROPAGATION DELAY TIMES AND TEST CIRCUIT
INPUT
LEVEL
An
GND
t_PLH
Bn
t_r = 3ns
t_f = 3ns
90%
V_S
10%
t_PHL
V_S
FIGURE 3. PROPAGATION DELAY TIMES
OUTPUT
DUT
R_L (NOTE)
500Ω
OUTPUT
LOAD
C_L
50pF
NOTE: For AC Series Only: When V_CC = 1.5V, R_L = 1kΩ.
AC
ACT
Input Level
Input Switching Voltage, V_S
Output Switching Voltage, V_S
V_CC
0.5 V_CC
0.5 V_CC
3V
1.5V
0.5 V_CC
FIGURE 4. PROPAGATION DELAY TIMES
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