74ACT1284TTR STMicroelectronics, 74ACT1284TTR Datasheet - Page 5

• Manufacturer Part Number: 74ACT1284TTR
• Description: IC TXRX IEEE 1284 HS 20-TSSOP
• Manufacturer: STMicroelectronics
• Series: 74ACTr

Specifications of 74ACT1284TTR

• Logic Type: IEEE STD 1284 Translation Transceiver
• Supply Voltage: 4.5 V ~ 5.5 V
• Number Of Bits: 4
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TEST CIRCUIT
C
R
Figure 1 : Propagation Delay Time
t
t
t
t
t
t
PHL
PLH
PHL
r
EN
DIS
L
T
, t
= 50 pF or equivalent (includes jig and probe capacitance)
= Z
f
(HD to B1-B7) R
(A1-A7 to B1-B7) R
, t
(HD to B1-B7) R
(A1-A7 to B1-B7) R
(A1-A7 to B1-B7) R
OUT
PLH
of pulse generator (typically 50 )
(B1-B4 to A1-A4) R
L
L
= 62
= 62
L
L
L
= 500
= 62
= 62 (see waveform 1)
R
(see waveform 3)
L
1
= 500
= 33 (see waveform 3)
R
(see waveform 1)
1
= 33
TEST
(see waveform 2)
see waveform 1)
CLOSED
CLOSED
CLOSED
CLOSED
OPEN
OPEN
S1
GND
GND
GND
GND
V
V
S2
CC
CC
74ACT1284
GND
GND
GND
GND
V
V
S2
CC
CC
5/11