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| 74F8960 Datasheet, PDF (11/11 Pages) NXP Semiconductors – Octal latched bidirectional Futurebus transceivers 3-State open-collector | |||
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Philips Semiconductors FAST Products
Octal latched bidirectional Futurebus transceivers
(3-State + open-collector)
Product specification
74F8960/74F8961
AC WAVEFORMS
An, Bn, OEBn
VM
tPLH
VM
tPHL
An, Bn, OEBn
VM
tPHL
VM
tPLH
An, Bn
VM
VM
Waveform 1. Propagation delay for data to output
An, Bn
VM
VM
Waveform 2. Propagation delay for data to output
An
VM
VM
VM VM
th(L)
th(H)
ts(L)
ts(H)
LE
VM
VM
tw(L)
VM
Waveform 3. Data setup and hold times and LE pulse width
OEA
VM
VM
OEA
VM
VM
tPZH
tPHZ
VOH -0.3V
An
VM
0V
Waveform 4. 3âstate output enable time to high level
and output disable time from high level
tPZL
tPLZ
An
VM
VOL +0.3V
Waveform 5. 3-state output enable time to low level
and output disable time from low level
NOTES:
1. For all waveforms, VM = 1.5V.
2. The shaded areas indicate when the input is permitted to change for predictable output performance.
TEST CIRCUITS AND WAVEFORMS
SWITCH POSITION
TEST SWITCH
tPLZ, tPZL closed
VCC
All other open
VIN
VOUT
RL
PULSE
D.U.T.
GENERATOR
RT
CL RL
Test circuit for 3âstate outputs on A port
VCC
7.0V
7.0V
90%
NEGATIVE
PULSE
POSITIVE
PULSE
10%
tw
VM
10%
tTHL (tf )
VM
10%
tTLH (tr )
tTLH (tr )
90%
VM
tw
tTHL (tf )
90%
VM
Input pulse definition
90%
AMP (V)
Low V
AMP (V)
10%
Low V
VIN
VOUT
RU
PULSE
D.U.T.
GENERATOR
INPUT PULSE REQUIREMENTS
family
74F amplitude Low V VM rep. rate
tw
tTLH
tTHL
RT
CD
A port
B port
3.0V
3.0V
0.0V 1.5V
1.0V 1.5V
1MHz
1MHz
Test circuit for outputs on B port
DEFINITIONS:
RL =
CL =
RU =
CD =
RT =
Load resistor; see AC electrical characteristics for value.
Load capacitance includes jig and probe capacitance; see AC electrical characteristics for value.
Pull up resistor; see AC electrical characteristics for value.
Load capacitance includes jig and probe capacitance; see AC electrical characteristics for value.
Termination resistance should be equal to ZOUT of pulse generators.
500ns 2.5ns 2.5ns
500ns 4.0ns 4.0ns
December 19, 1990
11
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