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HEF40373BT,652

P1-P3P4-P6P7-P9P10-P12P13-P15
HEF40373B
Octal transparent latch with 3-state outputs
Rev. 4 — 29 June 2018 Product data sheet
1 General description
The HEF40373B is an 8-bit transparent latch with 3-state buffered outputs. The output
stages have high current output capability suitable for driving highly capacitive loads.
The latch outputs follow the data inputs when the latch enable (E) is HIGH. When E is
LOW, the data that meets the set-up times is latched. The 3-state outputs are controlled
by the output enable input EO. A HIGH on EO causes the outputs to assume a high
impedance OFF-state. The device features hysteresis on the E input to improve noise
rejection. Schmitt-trigger action in the E input makes the circuit highly tolerant to slower
input rise and fall times.
2 Features and benefits
• Octal bus interface
• 3-state buffers
• Fully static operation
• 5 V, 10 V, and 15 V parametric ratings
• Standardized symmetrical output characteristics
• Specified from −40 °C to +85 °C
3 Ordering information
Table 1. Ordering information
PackageType number
Temperature range Name Description Version
HEF40373BT -40 °C to +85 °C SO20 plastic small outline package; 20 leads;
body width 7.5 mm
SOT163-1
Nexperia
HEF40373B
Octal transparent latch with 3-state outputs
4 Functional diagram
aaa-028685
3 2
D0
4 5
D1
7 6
D2
8 9
D3
13 12
D4
14 15
D5
17 16
D6
18 19
D7
O0
O1
O2
O3
O4
O5
O6
O7
11
E
1
EO
Figure 1. Logic symbol
aaa-028686
1
EN
3
7
8
13
14
17
18
1D
5
2
6
9
12
15
16
19
O1
O0
O2
O3
O4
O5
O6
O7
4
EO
11
C1E
D0
D2
D3
D4
D5
D6
D7
D1
Figure 2. IEC logic symbol
LATCH
1 TO 8
D0
3-STATE
OUTPUTS
D1
D2
D3
D4
D5
D6
D7
O0
O1
O2
O3
O4
O5
O6
O7
2
5
6
9
12
15
16
19
aaa-028687
E
EO
3
4
7
8
13
14
17
18
11
1
Figure 3. Functional diagram
001aae051
LE
QD
LE
LE
LE
Figure 4. Logic diagram (one latch)
QD
D0
O0
LATCH
1
LE
E
EO
LE
QD
D1
O1
LATCH
2
LE LE
QD
D2
O2
LATCH
3
LE LE
QD
D3
O3
LATCH
4
LE LE
QD
D4
O4
LATCH
5
LE LE
QD
D5
O5
LATCH
6
LE LE
QD
D6
O6
LATCH
7
LE LE
aaa-028688
QD
D7
O7
LATCH
8
LE LE
Figure 5. Logic diagram
HEF40373B All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2018. All rights reserved.
Product data sheet Rev. 4 — 29 June 2018
2 / 15
Nexperia
HEF40373B
Octal transparent latch with 3-state outputs
5 Pinning information
5.1 Pinning
HEF40373B
EO V
DD
O0 O7
D0 D7
D1 D6
O1 O6
O2 O5
D2 D5
D3 D4
O3 O4
V
SS
E
aaa-028689
1
2
3
4
5
6
7
8
9
10
12
11
14
13
16
15
18
17
20
19
Figure 6. Pin configuration for SO20
5.2 Pin description
Table 2. Pin description
Symbol Pin Description
EO 1 output enable input (active low)
E 11 latch enable input
D0, D1, D2, D3, D4, D5, D6, D7 3, 4, 7, 8, 13, 14, 17, 18 data inputs
O0, O1, O2, O3, O4, O5, O6, O7 2, 5, 6, 9, 12, 15, 16, 19 data outputs
V
SS
10 ground supply voltage
V
DD
20 supply voltage
HEF40373B All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2018. All rights reserved.
Product data sheet Rev. 4 — 29 June 2018
3 / 15
P1-P3P4-P6P7-P9P10-P12P13-P15

HEF40373BT,652

Mfr. #:
Buy HEF40373BT,652
Manufacturer:
Nexperia
Description:
Latches OCT TRANSP LATCH
Lifecycle:
New from this manufacturer.
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