Philips Semiconductors
Product specification
8-bit bus interface latch with set and reset
(3-State)
74ABT845
FEATURES
• High speed parallel latches
DESCRIPTION
The 74ABT845 consists of eight D-type latches with 3-State outputs.
In addition to the LE, OE, MR and PRE pins, the 74ABT845 has two
additional OE pins, making a total of three Output Enable (OE0,
OE1, OE2) pins. The multiple Output enables allow multiuser control
of the interface, e.g., CS, DMA, and RD/WR.
• Ideal where high speed, light loading, or increased fan-in are
required with MOS microprocessors
• Broadside pinout
• Output capability: +64mA/–32mA
• Power-up 3-State
• Power-up reset
• Latch-up protection exceeds 500mA per Jedec Std 17
• ESD protection exceeds 2000 V per MIL STD 883 Method 3015
and 200 V per Machine Model
QUICK REFERENCE DATA
CONDITIONS
= 25°C; GND = 0V
SYMBOL
PARAMETER
TYPICAL
UNIT
T
amb
t
t
Propagation delay
Dn to Qn
PLH
PHL
C = 50pF; V = 5V
5.4
4
ns
pF
pF
nA
L
CC
C
Input capacitance
V = 0V or V
I CC
IN
Outputs disabled;
= 0V or V
C
Output capacitance
Total supply current
7
OUT
CCZ
V
O
CC
I
Outputs disabled; V = 5.5V
500
CC
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE OUTSIDE NORTH AMERICA
NORTH AMERICA
74ABT845 N
DWG NUMBER
SOT222-1
24-Pin Plastic DIP
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
74ABT845 N
74ABT845 D
74ABT845 DB
74ABT845 PW
24-Pin plastic SO
74ABT845 D
SOT137-1
24-Pin Plastic SSOP Type II
24-Pin Plastic TSSOP Type I
74ABT845 DB
74ABT845PW DH
SOT340-1
SOT355-1
PIN CONFIGURATION
PIN DESCRIPTION
PIN NUMBER
SYMBOL
FUNCTION
Output enable inputs
(active-Low)
1, 2, 23
OE0 – OE2
D0-D7
24
OE0
OE1
D0
1
2
3
4
5
6
7
8
9
V
CC
23 OE2
22 Q0
21 Q1
20 Q2
19 Q3
18 Q4
17 Q5
16 Q6
3, 4, 5, 6,
7, 8, 9, 10
Data inputs
D1
22, 21, 20, 19,18,
17, 16, 15
Q0-Q7
MR
Data outputs
D2
11
13
Master reset input (active-Low)
D3
Latch enable input
(active-High)
D4
LE
D5
14
12
24
PRE
GND
Preset input (active-Low)
Ground (0V)
D6
D7 10
MR 11
15
14
13
Q7
V
CC
Positive supply voltage
PRE
LE
GND 12
TOP VIEW
SA00258
1
1995 Sep 06
853-1703 15702