TC74VCX16841FT
2001-10-17
1
TOSHI BA CMO S Dig ita l Int egrat ed Circ uit Silicon Monolit h ic
TC74VCX16841FT
Low-Voltage 20-Bit D-Type Latch with 3.6-V Tolerant Inputs and Outputs
The TC74VCX16841FT is a high-performance CMOS 20-bit
D-type latch. Designed for use in 1.8-V, 2.5-V or 3.3-V systems, it
achieves high-speed operation while maintaining the CMOS low
power dissipation.
It is also designed with overvoltage tolerant inputs and outputs
up to 3.6 V.
The TC74VCX16841FT can be used as two 10-bit latches or one
20-bit latch. The 20 latches are transparent D-type latches. The
device has noninverting data (D) inputs and provides true data at
its outputs. While the latch-enable (1LE or 2LE) input is high,
the Q outputs of the corresponding 1 0-bit latch follow the D
inputs. When LE is taken low, the Q outputs are latched at the
levels set up at the D inputs. When the OE in put is high, the
outputs are in a high-impedance state. This device is designed to be used with 3-state memory address drivers, etc.
All inputs are equipped with protection circuits against static discharge.
Features
• Low-volt ag e oper ation: VCC = 1.8 to 3.6 V
• High-s peed oper at i on: tpd = 3.0 ns (max) (VCC = 3.0 to 3.6 V)
: tpd = 3.4 ns (max) (VCC = 2.3 to 2.7 V)
: tpd = 6.8 ns (max) (VCC = 1.8 V)
• Output curre nt : IOH/IOL = ±24 mA (min) (VCC = 3.0 V)
: IOH/IOL = ±18 mA (min) (VCC = 2.3 V)
: IOH/IOL = ±6 mA (min) (VCC = 1.8 V)
• Latch-up performance: ±300 mA
• ESD performance : Machine model > ±200 V
: Human body model > ±2000 V
• Package: TSSOP (thin shrink small outline package)
• 3.6-V tolerant function and power-down protection provided on all inputs and outputs
Weight: 0.25 g (typ.)
TC74VCX16841FT
2001-10-17
2
Pin Assignment (top view) IEC Logic Symbol
1
28
29
55
1D1
52
49
51
47
48
44
45
1D3
1D5
1D4
1D6
2D3
2D2
43
40
41
38
2D4
2D7
2D6
2D8
EN2
EN4
5
8
10
1Q3
1Q5
1Q7
3
6
9
1Q2
1Q4
1Q6
15
17
20
23
2Q1
2Q3
2Q5
2Q7
13
16
19
21
1Q9
2Q2
2Q4
2Q6
12 1Q8
C3
36
37
34
33
2D5
1D10
1D8
1D7
1D9
54
1D2
42
2D1
2 1Q1
14 1Q10
OE1
2D9
2D10
31
30
1D 2
24 2Q8
26 2Q9
27 2Q10
56 C1 1LE
2LE
2OE
3D 4
1LE
48
1D1
1D2
GND
47
46
45
44
43
42
OE1 1
2
3
4
5
6
7
GND
1Q3
1Q4
VCC
1Q5
1Q6
1D3
8
9
10
1D5
1D6
1Q7
41
40
39
1D4
VCC
1D7
1Q2
GND
38
1D8
1D9
1D10
37
36
35
34
33
32
GND 11
12
13
14
15
16
17
1Q10
2Q1
2Q2
2Q3
GND
2Q4
2D1
18
19
20
GND
2D4
2Q5
31
30
29
2D2
2D3
2D5
1Q8
1Q9
21
2Q6
VCC
2Q7
22
23
24
VCC
2D7
2Q8
2D6
2D8
25GND
262Q9
272Q10
28
OE2
GND
2D9
2D10
2LE
56
55
54
53
52
51
50
49
1Q1
TC74VCX16841FT
2001-10-17
3
Truth Table (each 10-bit latch)
Input
OE LE D
Output
Q
L H H H
L H L L
L L X Qn
H X X Z
X: Don’t care
Z: High impedance
Qn: Q outputs are latched at the time when the LE input is taken to a low logic level.
System Diagram
28
1
1LE
1Q1
1D1
1Q2
1D2
1Q3
1D3
1Q4
1D4
1Q5
1D5
1Q6
1D6
1Q7
1D7
1Q8
1D8
1Q9
1D9
1Q10
1D10
1OE
D
Q
LE
D
Q
LE
D
Q
LE
D
Q
LE
D
Q
LE
D
Q
LE
D
Q
LE
D
Q
LE
D
Q
LE
D
Q
LE
2LE
2Q1
2D1
2Q2
2D2
2Q3
2D3
2Q4
2D4
2Q5
2D5
2Q6
2D6
2Q7
2D7
2Q8
2D8
2Q9
2D9
2Q10
2D10
2OE
D
Q
LE
D
Q
LE
D
Q
LE
D
Q
LE
D
Q
LE
D
Q
LE
D
Q
LE
D
Q
LE
D
Q
LE
D
Q
LE
55 54 52 51 49 48 47 45 44 43
2 3 5 6 8 9
10 12 13 14
42 41 40 38 37 36 34 33 31 30
15 16 17 19 20 21 23 24 26 27
56
29
TC74VCX16841FT
2001-10-17
4
Maximum Ratings
Characteristics Symbol Rating Unit
Power supply volt age VCC −0.5 to 4.6 V
DC input volt age VIN −0.5 to 4.6 V
−0.5 to 4.6 (Note 1)
DC output voltage VOUT −0.5 to VCC + 0.5
(Note 2)
V
Input diode current IIK −50 mA
Output diode current IOK ±50 (Note 3) mA
DC output current IOUT ±50 mA
Power dissipation PD 400 mW
DC VCC/ground current per supply pin ICC/IGND ±100 mA
Storage temperature Tstg −65 to 150 °C
Note 1: OFF state
Note 2: High or low state. IOUT absolute maximum rating must be observed.
Note 3: VOUT < GND, VOUT > VCC
Recommended Operating Range
Characteristics Symbol Rating Unit
1.8 to 3.6
Power supply volt age VCC 1.2 to 3.6 (Note 4) V
Input volt age VIN −0.3 to 3.6 V
0 to 3.6 (Note 5)
Output voltage VOUT 0 to VCC (Note 6) V
±24 (Note 7)
±18 (Note 8)
Output current IOH/IOL
±6 (Note 9)
mA
Operating temperature Topr −40 to 85 ° C
Input rise and fall time dt/dv 0 to 10 (Note 10) ns/V
Note 4: Data retention only
Note 5: OFF state
Note 6: High or low state
Note 7: VCC = 3.0 to 3.6 V
Note 8: VCC = 2.3 to 2.7 V
Note 9: VCC = 1.8 V
Note 10: VIN = 0.8 to 2.0 V, VCC = 3.0 V
TC74VCX16841FT
2001-10-17
5
Electrical Characteristics
DC Characteristics (Ta =
==
= −
−−
−40 to 85°C, 2.7 V <
<<
< VCC
<
<<
<
=
==
=3.6 V)
Characteristics Symbol Test Condition VCC (V) Min Max Unit
H-level VIH 2.7 to 3.6 2.0
Input volt age L-level VIL 2. 7 t o 3.6 0.8 V
IOH = −100 µA 2.7 to 3.6 VCC
− 0.2
IOH = −12 mA 2.7 2.2
IOH = −18 mA 3.0 2.4
H-level VOH VIN = VIH or VIL
IOH = −24 mA 3.0 2.2
IOL = 100 µA 2.7 to 3.6 0.2
IOL = 12 mA 2.7 0.4
IOL = 18 mA 3.0 0.4
Output voltage
L-level VOL V
IN = VIH or VIL
IOL = 24 mA 3.0 0.55
V
Input leakage current IIN VIN = 0 to 3.6 V 2.7 to 3.6 ±5.0 µA
3-state output OFF state current IOZ VIN = VIH or VIL
VOUT = 0 to 3.6 V 2.7 to 3.6 ±10.0 µA
Power-off leakage current IOFF V
IN, VOUT = 0 to 3.6 V 0 10.0 µA
VIN = VCC or GND 2.7 to 3.6 20.0
Quiescent supply current ICC VCC
<
=(VIN, VOUT)
<
=3.6 V 2.7 to 3.6 ±20.0
Increas e in ICC per input ∆ICC V
IH = VCC − 0. 6 V 2.7 to 3.6 750
µA
DC Characteristics (Ta =
==
= −
−−
−40 to 85°C, 2.3 V
<
<<
<
=
==
=VCC
<
<<
<
=
==
=2.7 V)
Characteristics Symbol Test Condition VCC (V) Min Max Unit
H-level VIH 2.3 to 2.7 1.6
Input volt age L-level VIL 2. 3 t o 2.7 0.7 V
IOH = −100 µA 2.3 to 2.7 VCC
− 0.2
IOH = −6 mA 2.3 2.0
IOH = −12 mA 2.3 1.8
H-level VOH VIN = VIH or VIL
IOH = −18 mA 2.3 1.7
IOL = 100 µA 2.3 to 2.7 0.2
IOL = 12 mA 2.3 0.4
Output voltage
L-level VOL V
IN = VIH or VIL
IOL = 18 mA 2.3 0.6
V
Input leakage current IIN VIN = 0 to 3.6 V 2.3 to 2.7 ±5.0 µA
3-state output OFF state current IOZ VIN = VIH or VIL
VOUT = 0 to 3.6 V 2.3 to 2.7 ±10.0 µA
Power-off leakage current IOFF V
IN, VOUT = 0 to 3.6 V 0 10.0 µA
VIN = VCC or GND 2.3 to 2.7 20.0
Quiescent supply current ICC VCC
<
=(VIN, VOUT)
<
=3.6 V 2.3 to 2.7 ±20.0 µA
TC74VCX16841FT
2001-10-17
6
DC Characteristics (Ta =
==
= −
−−
−40 to 85°C, 1.8 V
<
<<
<
=
==
=VCC <
<<
< 2.3 V)
Characteristics Symbol Test Condition VCC (V) Min Max Unit
H-level VIH 1.8 to 2.3 0.7 ×
VCC
Input volt age L-level VIL 1. 8 t o 2.3 0.2 ×
VCC
V
IOH = −100 µA 1.8
VCC
− 0.2
H-level VOH VIN = VIH or VIL IOH = −6 mA 1.8 1.4
IOL = 100 µA 1.8 0.2
Output voltage
L-level VOL V
IN = VIH or VIL IOL = 6 mA 1.8 0.3
V
Input leakage current IIN VIN = 0 to 3.6 V 1.8 ±5.0 µA
3-state output OFF state current IOZ VIN = VIH or VIL
VOUT = 0 to 3.6 V 1.8 ±10.0 µA
Power-off leakage current IOFF V
IN, VOUT = 0 to 3.6 V 0 10.0 µA
VIN = VCC or GND 1.8 20.0
Quiescent supply current ICC VCC
<
=(VIN, VOUT)
<
=3.6 V 1.8 ±20.0 µA
TC74VCX16841FT
2001-10-17
7
AC Characteristics (Ta =
==
= −
−−
−40 to 85°C, input: tr =
==
= tf =
==
= 2.0 ns, C L =
==
= 30 pF, RL =
==
= 500 Ω
ΩΩ
Ω)
Characteristics Symbol Test Condition VCC (V) Min Max Unit
1.8 1.5 6.8
2.5 ± 0.2 1.0 3.4
Propagation delay time
(D-Q)
tpLH
tpHL Figure 1, Figure 2
3.3 ± 0.3 0.8 3.0
ns
1.8 1.5 8.8
2.5 ± 0.2 1.0 4.4
Propagation delay time
(LE-Q)
tpLH
tpHL Figure 1, Figure 2
3.3 ± 0.3 0.8 3.5
ns
1.8 1.5 9.8
2.5 ± 0.2 1.0 4.9
3-state output enable tim e tpZL
tpZH Figure 1, Figure 3
3.3 ± 0.3 0.8 3.8
ns
1.8 1.5 7.6
2.5 ± 0.2 1.0 4.2
3-state output disable tim e tpLZ
tpHZ Figure 1, Figure 3
3.3 ± 0.3 0.8 3.7
ns
1.8 4.0
2.5 ± 0.2 1.5
Minimum pulse width
(LE) tW (H) Figure 1, Figure 2
3.3 ± 0.3 1.5
ns
1.8 2.5
2.5 ± 0.2 1.5
Mini mu m se tu p time ts Figure 1, Figure 2
3.3 ± 0.3 1.5
ns
1.8 1.0
2.5 ± 0.2 1.0
Minimum hold time th Figure 1, Figure 2
3.3 ± 0.3 1.0
ns
1.8 0.5
2.5 ± 0.2 0.5
Output to output skew tosLH
tosHL (Note 11)
3.3 ± 0.3 0.5
ns
For CL = 50 pF, add approximately 300 ps to the AC maximum specification.
Note 11: Parameter guaranteed by design.
(tosLH = |tpLHm − tpLHn|, tosHL = |tpHLm − tpHLn|)
TC74VCX16841FT
2001-10-17
8
Dynamic Switching Characteristics
(Ta =
==
= 25°C, input: tr =
==
= tf =
==
= 2.0 ns, C L =
==
= 30 pF, RL =
==
= 500 Ω
ΩΩ
Ω)
Characteristics Symbol Test Condition VCC (V) Typ. Unit
VIH = 1.8 V, VIL = 0 V (Note 12) 1.8 0.25
VIH = 2.5 V, VIL = 0 V (Note 12) 2.5 0.6
Quiet output maximum
dynamic VOL VOLP
VIH = 3.3 V, VIL = 0 V (Note 12) 3.3 0.8
V
VIH = 1.8 V, VIL = 0 V (Note 12) 1.8 −0.25
VIH = 2.5 V, VIL = 0 V (Note 12) 2.5 −0.6
Quiet output minimum
dynamic VOL V
OLV
VIH = 3.3 V, VIL = 0 V (Note 12) 3.3 −0.8
V
VIH = 1.8 V, VIL = 0 V (Note 12) 1.8 1.5
VIH = 2.5 V, VIL = 0 V (Note 12) 2.5 1.9
Quiet output minimum
dynamic VOH V
OHV
VIH = 3.3 V, VIL = 0 V (Note 12) 3.3 2.2
V
Note 12: Parameter guaranteed by design.
Capacitive Characteristics (Ta =
==
= 25°C)
Characteristics Symbol Test Condition VCC (V) Typ. Unit
Input capacitance CIN 1.8, 2.5, 3.3 6 pF
Output capacitance COUT 1.8, 2.5, 3.3 7 pF
Power dissipation capac itance CPD f
IN = 10 MHz (Note 13) 1.8, 2.5, 3.3 20 pF
Note 13: CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating
current consumption without load.
Average operating current can be obtained by the equation:
I
CC (opr) = CPD･VCC･fIN + ICC/20 (per bit)
TC74VCX16841FT
2001-10-17
9
AC Test Circuit
AC Waveform
Figure 1
Parameter Switch
tpLH, tpHL Open
tpLZ, tpZL 6.0 V @VCC = 3.3 ± 0.3 V
VCC × 2 @V CC = 2.5 ± 0.2 V
@VCC = 1.8 V
tpHZ, tpZH GND
6.0 V or VCC × 2
Open
GND
Switch
Output Measure
CL = 30 pF
RL = 500 Ω
RL RL
CL
Figure 2 tpLH, tpHL, tw, ts, th
th (L) ts (L)
10%
90% VM
VIH
GND
VIH
GND
VOH
VOL
ts (H) th (H)
tf 2.0 ns tr 2.0 ns
90%
VM
10% VM
VM
tpHL t
pLH
VM
tw (H)
tpLH t
pHL
VM
Input
(LE)
Input
(D)
Output
(Q)
tr 2.0 ns tf 2.0 ns
TC74VCX16841FT
2001-10-17
10
VCC
Symbol 3.3 ± 0.3 V 2.5 ± 0.2 V 1.8 V
VIH 2.7 V VCC V
CC
VM 1.5 V VCC/2 VCC/2
VX V
OL + 0.3 V V OL + 0.15 V VOL + 0.15 V
VY V
OH − 0.3 V VOH − 0.15 V VOH − 0.15 V
Figure 3 tpLZ, tpHZ, tpZL, tpZH
90%
10%
VOL
3.0 V or VCC
GND
VIH
VM
tpHZ t
pZH
tr 2.0 ns
VM
GND
VOH
Outputs
enabled
VM
tpLZ tpZL
VY
Outputs
disabled
Outputs
enabled
Output Enable
Control ( OE )
Output (Q)
Low to Off to Low
Output (Q)
High to Off to High
VX
tf 2.0 ns
TC74VCX16841FT
2001-10-17
11
Package Dimensions
Weight: 0.25 g (typ.)
TC74VCX16841FT
2001-10-17
12
• TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor
devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical
stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of
safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of
such TOSHIBA products could cause loss of human life, bodily injury or damage to property.
In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as
set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and
conditions set forth in the “Handling Guide for Semiconductor Devices,” or “TOSHIBA Semiconductor Reliability
Handbook” etc. .
• The TOSHIBA products listed in this document are intended for usage in general electronics applications
(computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances,
etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires
extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or
bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or
spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments,
medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this
document shall be made at the customer’s own risk.
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responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other
rights of the third parties which may result from its use. No license is granted by implication or otherwise under
any intellectual property or other rights of TOSHIBA CORPORATION or others.
• The information contained herein is subject to change without notice.
000707EB
A
RESTRICTIONS O N PRODUCT USE
