GTL2000 Datasheet, PDF (2/6 Pages) NXP Semiconductors – 22-bit GTL processor voltage clamp

Philips Semiconductors
22-bit GTL processor voltage clamp
Product specification
GTL2000
FEATURES
• Direct interface with TTL level
• 6.5Ω ON-state connection between port S_n and D_n
DESCRIPTION
The GTL2000 provides twenty-two bits of high-speed voltage
clamps. The low ON-state resistance of the clamp allows
connections to be made with minimal propagation delay.
The device is organized as one 22-bit voltage clamp. When S or D
is low the clamp is in the ON–state and a low resistance connection
exists between the S and D ports. When S port and D port are high,
the clamp is in the OFF-state and a very high impedance exists
between the S and D ports. When the D port is high, the voltage on
the S port is clamped to the applied reference voltage on the GREF
port.
FUNCTION TABLE
G_REF
D_REF
S_REF4
Switch
Driven Output of
Input Driven Input
H
H
0V
off
X
X
H
H
V_TT
on
H
H
H
V_TT nearly off V_TT
L
L
V_TT
on
L
V_TT1
H²
L³
L
L
0 – V_TT
off
X
X
H = High voltage level
L = Low voltage level
X = Don’t Care
NOTES:
1. The output is not pulled up or pulled down.
2. The output is pulled up to V_CC through an external resistor.
3. The driven output can be S_n or D_n; the output of drivn input
follows the input low.
4. G_REF must be at least 1.5 V higher than S_REF for proper switch
operation.
PIN CONFIGURATION
GND 1
S_REF 2
S₁ 3
S₂ 4
S₃ 5
S₄ 6
S₅ 7
S₆ 8
S₇ 9
S_{8 10}
S₉ 11
S₁₀ 12
S₁₁ 13
S_{12 14}
S₁₃ 15
S₁₄ 16
S₁₅ 17
S₁₆ 18
S_{17 19}
S₁₈ 20
S₁₉ 21
S₂₀ 22
S₂₁ 23
S₂₂ 24
QUICK REFERENCE DATA
SYMBOL
PARAMETER
t_PLH
C_OFF
Propagation delay
Sn to Dn
Channel capacitance (OFF-state)
CONDITIONS
T_amb = 25°C; GND = 0V
V_DD1 = 3.3 V; V_DD2 = 2.5 V;
V_REF = 1.5 V; unloaded
V_S = 1.5 V
ORDERING INFORMATION
PACKAGES
48-Pin Plastic SSOP Type II
TEMPERATURE RANGE
0°C to +85°C
ORDER CODE
GTL2000 DL
48 ^GREF
47 DREF
46 D₁
45 D2
44 D₃
43 D₄
42 D₅
41 ^D6
40 D7
39 D8
38 D9
37 D₁₀
36 D₁₁
35 D12
34 D₁₃
33 D14
32 D₁₅
31 D₁₆
30 ^D17
29 D18
28 D19
27 D20
26 D21
25 ^D22
SA00521
TYPICAL
1.5
7.5
UNIT
ns
pF
DWG NUMBER
SOT370–1
2000 Jan 25
2
853-2154 23030