74ABT845 Datasheet, PDF (5/7 Pages) NXP Semiconductors – 8-bit bus interface latch with set and reset 3-State

Philips Semiconductors
8-bit bus interface latch with set and reset
(3-State)
Product specification
74ABT845
AC CHARACTERISTICS
GND = 0V, t_R = t_F = 2.5ns, C_L = 50pF, R_L = 500Ω
SYMBOL
PARAMETER
WAVEFORM
t_PLH
Propagation delay
t_PHL
Dn to Qn
1
t_PLH
Propagation delay
t_PHL
LE to Qn
2
t_PLH
Propagation delay
t_PHL
PRE to Qn
1
t_PLH
Propagation delay
t_PHL
MR to Qn
1
t_PZH
Output enable time
4
t_PZL
OEn to Qn
5
t_PHZ
Output disable time
4
t_PLZ
OEn to Qn
5
LIMITS
T_amb = +25^oC
V_CC = +5.0V
Min
Typ
Max
1.0
3.9
5.4
2.2
5.4
6.8
2.0
5.1
6.6
2.8
6.4
7.9
2.2
4.9
6.6
3.0
5.3
6.8
2.4
4.9
6.4
3.1
5.9
7.3
1.0
3.8
5.4
2.0
4.7
6.1
1.9
4.6
6.2
2.2
4.7
6.4
T_amb = -40 to
+85^oC
V_CC = +5.0V ±0.5V
Min
Max
1.0
6.2
2.2
7.8
2.0
7.5
2.8
8.9
2.2
7.8
3.0
7.4
2.4
7.3
3.1
8.5
1.0
6.3
2.0
6.7
1.9
7.2
2.2
7.0
UNIT
ns
ns
ns
ns
ns
ns
AC SETUP REQUIREMENTS
GND = 0V, t_R = t_F = 2.5ns, C_L = 50pF, R_L = 500Ω
SYMBOL
PARAMETER
t_s(H)
t_s(L)
t_h(H)
t_h(L)
t_w(H)
t_w(L)
t_w(L)
t_rec
t_rec
Setup time, High or Low
Dn to LE
Hold time, High or Low
Dn to LE
LE pulse width, High
PRE pulse width, Low
MR pulse width, Low
PRE recovery time
MR recovery time
WAVEFORM
3
3
3
6
6
6
6
LIMITS
T_amb = +25^oC
V_CC = +5.0V
Min
Typ
T_amb = -40 to +85^oC
V_CC = +5.0V ±0.5V
Min
2.8
1.0
2.8
3.5
1.4
3.5
1.0
–1.2
1.0
1.0
–0.6
1.0
3.0
1.5
3.0
3.5
2.0
3.5
2.8
1.3
2.8
3.0
1.4
3.0
3.4
1.6
3.4
UNIT
ns
ns
ns
ns
ns
ns
ns
1995 Sep 06
5