N74F219AN 데이터 시트보기 (PDF) - Philips Electronics
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N74F219AN Datasheet PDF : 12 Pages
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Philips Semiconductors
64-bit TTL bipolar RAM, non-inverting (3-State)
Product specification
74F219A
AC WAVEFORMS FOR WRITE CYCLE
An
VM
tsu (H or L)
VM
th (H or L)
Dn
VM
tsu ( L)
CE
VM
tsu (H or L)
WE
VM
Qn
NOTE: For all waveforms, VM = 1.5V.
th ( L)
tw ( L)
tPHZ
VM
tPLZ
Hi–Z
VM
th (H or L)
VM
VM
VM
tPZH
VM
tPZL
Waveform 4. Write cycle
SP000313
TEST CIRCUIT AND WAVEFORM
VIN
PULSE
GENERATOR
VCC
VOUT
D.U.T.
NEGATIVE
PULSE
90%
tw
VM
10%
tTHL (tf )
VM
10%
tTLH (tr )
90%
AMP (V)
0V
RT
CL RL
Test Circuit for Totem-Pole Outputs
POSITIVE
PULSE
10%
tTLH (tr )
90%
VM
tw
tTHL (tf )
90%
VM
AMP (V)
10%
0V
DEFINITIONS:
RL = Load resistor;
see AC ELECTRICAL CHARACTERISTICS for value.
CL = Load capacitance includes jig and probe capacitance;
see AC ELECTRICAL CHARACTERISTICS for value.
RT = Termination resistance should be equal to ZOUT of
pulse generators.
Input Pulse Definition
family
74F
INPUT PULSE REQUIREMENTS
amplitude VM rep. rate
tw
tTLH
3.0V 1.5V 1MHz 500ns 2.5ns
tTHL
2.5ns
SF00006
1996 Jan 05
7
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